ERRATA: 32:16 The 'ntp authenticate' command isn't needed to enable NTP authentication. It is only needed when using 'ntp passive', 'ntp broadcast client' or 'ntp multicast client' - all beyond the scope of the CCNA exam. Check out www.cisco.com/c/en/us/td/docs/ios-xml/ios/bsm/command/bsm-cr-book/bsm-cr-n1.html#wp2231112076 for more information. To be fair, lots of other Cisco documentation and CCNA study materials state that this command is necessary, but that seems to be a misunderstanding. Try it out on some Cisco routers and you'll see it's not necessary!
Hello Jeremy and anyone finding this course helpful. I passed my CCNA last night and I can say that this course helped more than any other resource. For those preparing, who have taken CompTIA, this is far different than them. I had 86 questions and 4 labs, you can only move forward in the test, no flagging for review, no going back to change an answer so be prepared for that. I commented on the NTP video because 3 of my 4 questions had NTP setup with peers and clients. Two had setting up SSH connections. One was all VLANS and trunking. I got none on OSPF or STP which is where I spent the majority of my practice after reading about others experiences. I also used Boson practice tests. I also had quite a few regular questions on Wireless LAN setup and SDN. SDN was actually my strongest category which was strange since in Boson tests, Security was always my strongest, in the exam it was my weakest. Either way, thanks Jeremy! These are the best video resources and I commend you for taking the time to create these and all the resources and labs and provide them for free.
Congrats on getting your CCNA! That's a major achievement, well done - I'm sure you studied a lot! And thanks so much for the generous tip; I really appreciate it :)
That's insane that you didn't get any STP or OSPF labs!!!! My first attempt, I couldn't even count how many questions I got about OSPF and IPv6, my two weakest categories back then. It appears everyone's exams can vary wildly and that you really have to be prepared for anything and everything.
whoever's studying and has come across this video on NTP... don't sleep on it! I was super confident on my ccna exam but I skipped over NTP during my studies because I felt it wasn't a huge topic to go into... i got like 5 questions that were related to NTP and I'm pretty sure I bomb'd them all. I got a 823 because of it and just missed the exam by 2 points LOL. I'll get it next time.... !!!
@@DaddyDagoth I dont think we need to know about the manual configuration.. the exam topics clearly states we need to be able to configure and verify NTP operating in client and server mode.. This definitely shouldnt be a 40 min video
@@DaddyDagoth It is a very important security, performance and auditing feature. Lots of hackers attempt to screw up the timers and date/time stamps so you cannot see what was done in logs. Furthermore, having accurate and verified time stamps will increase the performance of the network. NTP is super super important. Learn thoroughly.
Being your channel members for years, I now can finally say i passes my CCNA exam last week !!! thank you so much Jeremy for providing this complete course as I wouldn't have made it without your effort To those who are preparing CCNA, just wanna share with you guys that the exam would contain 2-3 lab question which need you to do some hands on configuration, mine was involving in OSPF, ether channel and NTP and of course they carry huge portion of the marks so be prepare if you wanna score well : )
Welcome to Jeremy's IT Lab, today we'll learn about Jeremy's country of origin & Country of residency. Jeremy was born in Canada, but this is an old technology and nobody uses it, Jeremy moved to Japan because their network is much faster.
As a long time network admin, time synchronization is critical to a healthy network across all devices! Others have thought of skipping this topic. I would suggest giving this video the time it deserves! (pun intended!).
At this point i am just overwhelmed. I feel like the amount of information stored in my brain will flood out just like a switch floods out unknown unicast frames. So many mac addresses to remember and so many commands that are, is it just because I have not started my revision ( as i plan to finish the series first and then revise myself by using boson and revise the topics whose answer I fail to answer correctly. Ps I USE THE ANKI FLASH CARDS but at this point i think theres so much to remember and also 20 more videos info, commands, concepts.
hahahhahahha like a switch flood out unicast frame, my brother that comment made me chuckle. Kinda in the same position, but I will continue watching and labbing.. targeting it in november, come on man, were all gonna make it
I know this was a year ago, but for anyone else reading this, remember that your brain is capable of storing and automating so many more things than you would think. I used to think the exact same thing this guy did. Think about how many different words you know, the random facts you know about a video game or tv show or something, people from decades ago you still might remember, all of that literally gets stored in your brain and we can still recall it years and years later. Your brain is not something that gets worse with use, it's actually more like a knife that gets rusted when you don't use it, and sharpened when you do. The more you use it and commit short term memory to your long term memory, the better it gets at doing it and the more you're actually able to learn and remember. Think of your brain like a hard drive that actually increases in size when you use it. This isn't even me just saying stuff to make you feel better, it's all very well studied. Trust your brain, get a bunch of reps in and go over this stuff multiple times (Do labs, flash cards, practice tests, read books/watch other videos as well if you need in addition to these, watch these ones back over, etc) and it will stick. Just takes time and practice and consistency.
Great video and one thing I would like to add is NTP dependency on L4 protocol and port. NTP uses UDP port 123 as both source and destination ports. It’s a fancy port number and easy to remember.
Thank you so much Jeremy, your videos are always the best, may God give you the strength to keep on supporting us with your super informative resources.👏👏
Thank you Jeremy, your lessons are very simple and very productive, they helps me very much. I am going to pass exam after a month and it breaks my heart that i can not complete whole course :(
Thank you Jeremy for uploading all of your videos. I watch them all. I am confident understanding related to networking. However I'm working on Fiber Optic System. More power to you Sir!
Finally finished this topic as well. most difficult thing about this topic is packet tracer don't have some of the commands. So, I had to practice on Cisco CML.😀
Thanks, Jeremy another great learning video! You and David Bombal are my inspiration to keep learning in regards to networking. I'm looking forward to your next video any hint? 😊✌
Unfortunately many commands aren’t available in packet tracer, but it’s good enough for the CCNA. Definitely look into other options for further study after the CCNA though.
Many thanks for the videos. how many additional videos do you plan to make ? i finished one different course which also helped much. I thought i can finish your videos earlier but it seems that you continue to help people in an understandable way and will not finish in short term.. Keep going..:) . I also recommend every lecturers to use touchscreen PC or a tablet to take not on the videos capturing screen. Upon saving pictures, it is easy to repeat . With doing so, i finished my 100+ videos in 15 days when repeating.. i also started your videos with same tactic. I recommend Epic Pen application to note on the screen...You also need a good smart pen to use on the PC screen. Good luck to all learners...
How many videos do you plan this Course to have ? How complete is it now ? Also, thank you so much for making the effort of publishing this amount of knowledge for free!
How is one suppose to memorize the overall Cisco commands for this 200-301???? The way the exam has been re-structure makes me think they trying to hinder people (mainly ones without any experience) from being successful on the exams. Good think we have Jeremy to guide us through.
The previous version actually required more knowledge of configurations/commands! This new version adds more theoretical stuff (although you do of course still need to know lots of configurations!)
In the Anki Flashcards for this episode, there is a question about how to configure daylight saving time, and the answer says that start and end requires "day, weekday, month and time", but I believe it should be "week (first, last, number), weekday, month and time". Can you please check? Wouldn't like to mess that up on the exam... ;-)
For your final example : why it is not D ? ntp server {address | hostname}: NTP client/server mode-the device acts as both client and server. First, it acts as an NTP client, to synchronize time with a server. Once synchronized, the device can then act as an NTP server, to supply time to other NTP clients.
Are you asking about the Boson example? 'NTP SERVER x.x.x.x' configures the device to synchronize its time to the server specified in the command. This is static client mode. After synchronizing to that server it CAN be a server for other NTP clients, but in this case A is definitely the more correct answer.
Thank you Jeremy. You're great as usual. I am starting to be worried about CCNA the amount of information to know is huge, and I am not being dramatic! The default stratum of ntp master is 7 or 8, this is something that I didn't understood. I've google It and I more confused I found this : "Default stratum level of router’s internal clock is 7"
When you use the 'ntp master' command, the router's NTP stratum level will be 8. It is syncing to itself (its internal clock), so in that case you can say the internal clock's stratum is 7.
Hello Jeremy, I would like to ask something about NTP. How can Routers, which are layer 3 devices, can communicate to a layer 7 level protocols? I am a bit confused about this. Maybe i misssed something. Your course is great. It is the reason i started learning networking. Thanks
I think im kind of retarded but I'll give this question a crack lmfao. Routers just forward packets to the destination it needs to reach via a next hop address if it has. I don't think it cares about communicating with anyhting beyond its layer as layer 7 is purely created by hosts that need whatever is going on over their lol. The routers job is just to make sure stuff is getting where it needs to be.
@@JeremysITLab Thanks for the series. I’m on day 45 now and feel confident that I have the minimum knowledge to pass the exam. I’ll finish out the series before testing and supplement as needed, but I can’t begin to express how valuable this [free] course has been.
I live in a country that has daylight savings, and I have no idea when it begins and ends exactly because every clock in my home does it on its own. I had to look it up lol
Thanks for the video and hardwork!!! Quick question. After tackling the ccna, what would you recommend next? I see videos where the devnet cert should be knocked out next, while others consider going straight for the ccnp, or even cloud certs.
It seems Packet Tracer does not allow for the configuration of Day Light Savings, nor does it allow for the clock update-calendar and clcok read-calendar commands
Thank you Jeremy Sir 🙏 Instead of using 127.127.1.1 address for master clock. Can we specify any other loopback address to use as it's NTP master clock.
Hi Jeremy, I would like to ask something, when we use ntp master command, the router will sync to its internal clock, the "internal" in this scenario means software clock or hardware calendar? thanks in advance
#Configuration *Global Configuration* *ntp server* _ip-address_ _[prefer]_ : Configures a Cisco device to synchronize its clock with a specific Network Time Protocol (NTP) server. The "ip-address" parameter is the IP address of the NTP server. The optional "prefer" keyword is used to indicate that this NTP server should be the primary source of time for the device. *ntp peer* _ip-address_ : Configures a Cisco device to synchronize its clock with a specific NTP peer. The "ip-address" parameter is the IP address of the NTP peer. *ntp update-calendar* : Updates the device's calendar with the current time obtained from the NTP server or peer. *ntp master* _[stratum]_ : Configures a Cisco device as an NTP master. The optional "stratum" parameter is used to specify the stratum level of the device. The lower the stratum level, the more accurate the time source. *ntp source* _interface_ : Specifies the interface from which the device should obtain its time source. #Show *Privileged EXEC* *show ntp associations* : Displays information about the NTP associations on a Cisco device. This includes the status of the associations, the IP address of the server or peer, and the stratum level. *show ntp status* : Displays the current status of the NTP service on a Cisco device. This includes the current time, the time source, and the stratum level. #Authentication *Global Configuration* *ntp authenticate* : Enables NTP authentication on a Cisco device. *ntp authentication-key* _key-number_ *md5* _key_ : Configures an NTP authentication key on a Cisco device. The "key-number" parameter is the number assigned to the key, "md5" specifies the type of key (MD5) and "key" is the key value. *ntp trusted-key* _key-number_ : Specifies the NTP authentication key that the device should use. *ntp server* _ip-address_ *key* _key-number_ : Configures a Cisco device to synchronize its clock with a specific NTP server and specify the key for authentication. *ntp peer* _ip-address_ *key* _key-number_ : Configures a Cisco device to synchronize its clock with a specific NTP peer and specify the key for authentication. #Clock *Global Configuration* *clock summer-time* _zone_ { _date month year hh:mm date month year hh:mm_ | *recurring* _week day month hh:mm week day month hh:mm_ } _[offset]_ : Configure system to switch to automatically daylight saving time. Offset is the number of minutes to add during the summer time. Enter dates in ascending order. *clock timezone* _zone hours-offset [minutes-offset]_ : To set the time zone for display.
At 12:42, shouldn't it be R1(config)# clock summer-time name recurring start end [offset] instead of R1(config)# clock summer-time recurring name start end [offset] ?
Maybe it could be that he got a networking job like IT manager in Japan, so he would've moved to Japan. Also, I don't think he's gonna reply to your comment, because whenever I see most recent comments like before days or weeks, they ask a lots of question. There wasn't even one reply. He only replied to the super thanks comment. So I dont think he's gonna reply. But let's see.
For the NTP key-number does it have to match on both client and server? Obviously, the key itself has to be the same but can the numbers be different per machine?
ERRATA:
32:16 The 'ntp authenticate' command isn't needed to enable NTP authentication. It is only needed when using 'ntp passive', 'ntp broadcast client' or 'ntp multicast client' - all beyond the scope of the CCNA exam. Check out www.cisco.com/c/en/us/td/docs/ios-xml/ios/bsm/command/bsm-cr-book/bsm-cr-n1.html#wp2231112076 for more information.
To be fair, lots of other Cisco documentation and CCNA study materials state that this command is necessary, but that seems to be a misunderstanding. Try it out on some Cisco routers and you'll see it's not necessary!
Hello Jeremy and anyone finding this course helpful. I passed my CCNA last night and I can say that this course helped more than any other resource. For those preparing, who have taken CompTIA, this is far different than them. I had 86 questions and 4 labs, you can only move forward in the test, no flagging for review, no going back to change an answer so be prepared for that. I commented on the NTP video because 3 of my 4 questions had NTP setup with peers and clients. Two had setting up SSH connections. One was all VLANS and trunking. I got none on OSPF or STP which is where I spent the majority of my practice after reading about others experiences. I also used Boson practice tests. I also had quite a few regular questions on Wireless LAN setup and SDN. SDN was actually my strongest category which was strange since in Boson tests, Security was always my strongest, in the exam it was my weakest. Either way, thanks Jeremy! These are the best video resources and I commend you for taking the time to create these and all the resources and labs and provide them for free.
Congrats on getting your CCNA! That's a major achievement, well done - I'm sure you studied a lot! And thanks so much for the generous tip; I really appreciate it :)
Congrats
Congratulations. Thanks a lot for information. it is interesting that you got none of OSPF or STP labs.
That's insane that you didn't get any STP or OSPF labs!!!! My first attempt, I couldn't even count how many questions I got about OSPF and IPv6, my two weakest categories back then. It appears everyone's exams can vary wildly and that you really have to be prepared for anything and everything.
whoever's studying and has come across this video on NTP... don't sleep on it! I was super confident on my ccna exam but I skipped over NTP during my studies because I felt it wasn't a huge topic to go into... i got like 5 questions that were related to NTP and I'm pretty sure I bomb'd them all. I got a 823 because of it and just missed the exam by 2 points LOL. I'll get it next time.... !!!
lol thanks for the comment. I was thinking of skipping this video. Good luck on your next one!
That's insanely stupid, failing a ccna because you don't care about setting canadian timezones
@@sunburst8810 For real man wtf, this seems like such a trivial dumb topic that is at the same time needlessly complicated. FFS
@@DaddyDagoth I dont think we need to know about the manual configuration.. the exam topics clearly states we need to be able to configure and verify NTP operating in client and server mode.. This definitely shouldnt be a 40 min video
@@DaddyDagoth It is a very important security, performance and auditing feature. Lots of hackers attempt to screw up the timers and date/time stamps so you cannot see what was done in logs. Furthermore, having accurate and verified time stamps will increase the performance of the network. NTP is super super important. Learn thoroughly.
Being your channel members for years, I now can finally say i passes my CCNA exam last week !!!
thank you so much Jeremy for providing this complete course as I wouldn't have made it without your effort
To those who are preparing CCNA, just wanna share with you guys that the exam would contain 2-3 lab question which need you to do some hands on configuration, mine was involving in OSPF, ether channel and NTP and of course they carry huge portion of the marks so be prepare if you wanna score well : )
Jeremy your course was instrumental in helping me pass my CCNA today! got a score of 895 first try!
Awesome, so glad to hear that! 895 is a great score 👍
What other study materials did you use to cover other topics? My exam in is on 20th feb and I have very limited time to cover up and do exam practice.
@@neevpatel9926 How was your exam? I hope everything went well.
@@gee40trots I passed the exam with over 900 marks
@@neevpatel9926 wow that's a huge cut congratulations 👏👏👏👏
Welcome to Jeremy's IT Lab, today we'll learn about Jeremy's country of origin & Country of residency. Jeremy was born in Canada, but this is an old technology and nobody uses it, Jeremy moved to Japan because their network is much faster.
the mystic Jeremy Lore E X P A N D S
As a long time network admin, time synchronization is critical to a healthy network across all devices! Others have thought of skipping this topic. I would suggest giving this video the time it deserves! (pun intended!).
Thank you for the great series! Passed my CCNA three days ago
Awesome! Congrats Keyshawn! From experience I know the CCNA is a tough exam to pass
What materials did you use? Please help
At this point i am just overwhelmed. I feel like the amount of information stored in my brain will flood out just like a switch floods out unknown unicast frames. So many mac addresses to remember and so many commands that are, is it just because I have not started my revision ( as i plan to finish the series first and then revise myself by using boson and revise the topics whose answer I fail to answer correctly. Ps I USE THE ANKI FLASH CARDS but at this point i think theres so much to remember and also 20 more videos info, commands, concepts.
So how did it go?
hahahhahahha like a switch flood out unicast frame, my brother that comment made me chuckle.
Kinda in the same position, but I will continue watching and labbing.. targeting it in november, come on man, were all gonna make it
I know this was a year ago, but for anyone else reading this, remember that your brain is capable of storing and automating so many more things than you would think. I used to think the exact same thing this guy did.
Think about how many different words you know, the random facts you know about a video game or tv show or something, people from decades ago you still might remember, all of that literally gets stored in your brain and we can still recall it years and years later. Your brain is not something that gets worse with use, it's actually more like a knife that gets rusted when you don't use it, and sharpened when you do. The more you use it and commit short term memory to your long term memory, the better it gets at doing it and the more you're actually able to learn and remember. Think of your brain like a hard drive that actually increases in size when you use it. This isn't even me just saying stuff to make you feel better, it's all very well studied. Trust your brain, get a bunch of reps in and go over this stuff multiple times (Do labs, flash cards, practice tests, read books/watch other videos as well if you need in addition to these, watch these ones back over, etc) and it will stick. Just takes time and practice and consistency.
@@gorilla30100 nice comment, motivated me, thx
Great video and one thing I would like to add is NTP dependency on L4 protocol and port. NTP uses UDP port 123 as both source and destination ports. It’s a fancy port number and easy to remember.
Thank you so much Jeremy, your videos are always the best, may God give you the strength to keep on supporting us with your super informative resources.👏👏
I love you, Jeremy, you are the greatest and the most helpful and generous person that I ever met, my life will change because of you !
Many thanks Jeremy. Your lectures have helped me alot to understand networking. God bless you
Thank you! Glad to hear that :)
Thank you Jeremy, your lessons are very simple and very productive, they helps me very much. I am going to pass exam after a month and it breaks my heart that i can not complete whole course :(
I hope you'll follow along even after you pass ;)
Please never give up on these
Don't worry, I won't! :)
Thank you Jeremy for uploading all of your videos. I watch them all. I am confident understanding related to networking. However I'm working on Fiber Optic System. More power to you Sir!
Thanks for watching, Wilfred!
Ahh one more video before I go take the test! Thanks Jeremy! Wish me luck!
Good luck! What day is your exam?
Finally finished this topic as well. most difficult thing about this topic is packet tracer don't have some of the commands. So, I had to practice on Cisco CML.😀
Thanks, Jeremy another great learning video! You and David Bombal are my inspiration to keep learning in regards to networking. I'm looking forward to your next video any hint? 😊✌
Next video will be the lab for this video, so NTP again!
Waiting for your other IP services topics. Glad i found this channel
Gonna cover them all over the next few months 👍
Thanks Jeremy you have no idea how much i look forward to tuesdays
Haha glad to hear that
Default stratum level of router's internal clock is 7
Simply amazing. Thank you Jeremy!
Thanks, Piotr :)
Thank you for video. Thank you Jeremy, from Lima Perú.
Thanks for watching :)
i think there is a typing mistake at 33:41, bottom line ntp peering configured for R2 , it should be R3. Correct me if iam wrong. :)
Awesome series! Thanks Jeremy!
You're early this week ! thank you my man !
Only a couple hours ;)
Hello Jeremy , great video channel , thank you Jeremy for all your efforts to deliver such great content !
Thanks Samir :)
Thanks for the video Jeremy! Really appreciate it
Thanks for watching :)
Hi Jeremy. Please check your "clock summer-time" flash card. I believe it has the 'name' and 'recurring' keyword/option reversed
thank you so much.i learned lot of facts from this video
thanks Jeremy for the high value lecture.
As always great stuff!! thank you!!
I think part of it a little bit out of scope but it's really hard to know.
Which parts?
I agree, it's hard to determine from '4.2 Configure and verify NTP operating in a client and server mode' exactly what is included.
greetings jermey, keep up the great work
Thank you! :)
Thank you so much Jeremy ...
Thanks for watching :)
Thank you Jeremy for all those videos
Sometimes it is annoying, some commands you teach or illustrate during lecturing are not in packet tracer.
Unfortunately many commands aren’t available in packet tracer, but it’s good enough for the CCNA. Definitely look into other options for further study after the CCNA though.
Thank you for the Video lessons.
Ty jfoe your hard work. I really love your course...
Thank you :)
Many thanks for the videos.
how many additional videos do you plan to make ?
i finished one different course which also helped much. I thought i can finish your videos earlier but it seems that you continue to help people in an understandable way and will not finish in short term.. Keep going..:) .
I also recommend every lecturers to use touchscreen PC or a tablet to take not on the videos capturing screen. Upon saving pictures, it is easy to repeat . With doing so, i finished my 100+ videos in 15 days when repeating.. i also started your videos with same tactic. I recommend Epic Pen application to note on the screen...You also need a good smart pen to use on the PC screen. Good luck to all learners...
The course is about 70% complete
Thank you Jeremy :-)
Thanks for watching :)
How many videos do you plan this Course to have ? How complete is it now ? Also, thank you so much for making the effort of publishing this amount of knowledge for free!
The course is about 70% complete. It'll be finished this year, but I'm not sure exactly when.
How is one suppose to memorize the overall Cisco commands for this 200-301???? The way the exam has been re-structure makes me think they trying to hinder people (mainly ones without any experience) from being successful on the exams. Good think we have Jeremy to guide us through.
The previous version actually required more knowledge of configurations/commands! This new version adds more theoretical stuff (although you do of course still need to know lots of configurations!)
Thank you for this video!
Thanks Miguel :)
In the Anki Flashcards for this episode, there is a question about how to configure daylight saving time, and the answer says that start and end requires "day, weekday, month and time", but I believe it should be "week (first, last, number), weekday, month and time". Can you please check? Wouldn't like to mess that up on the exam... ;-)
You're right, fixed it! Thanks :)
more information as i expected
@JeremysITLab I'm confused on the quiz 3 , normally the answer should be D because the default stratum is 7 when we configure the ntp master
Hi sir/ you're all vedio is a great and all time chife and best / l like this your ,/i am a biginer ccna student
Thanks for watching :)
as always a great lesson, plenty of thanks
Thank you :)
Thanks a lot, God bless you!
Thanks for watching :)
Thanks Jeremy!
I think the
clock summer-time recurring name start end [offset] at 12:48 should be
clock summer-time name recurring start end [offset]
You live in Japan? Wow !! Hello neighbor! Must be a trip working as a network engineer here.
Thanks Jeremy.
Thanks, Stephen :)
For your final example : why it is not D ?
ntp server {address | hostname}: NTP client/server mode-the device acts as both client
and server. First, it acts as an NTP client, to synchronize time with a server. Once synchronized,
the device can then act as an NTP server, to supply time to other NTP clients.
Are you asking about the Boson example? 'NTP SERVER x.x.x.x' configures the device to synchronize its time to the server specified in the command. This is static client mode.
After synchronizing to that server it CAN be a server for other NTP clients, but in this case A is definitely the more correct answer.
@@JeremysITLab Thank you for the explanation
Thank you Jeremy. You're great as usual. I am starting to be worried about CCNA the amount of information to know is huge, and I am not being dramatic!
The default stratum of ntp master is 7 or 8, this is something that I didn't understood. I've google It and I more confused I found this : "Default stratum level of router’s internal clock is 7"
When you use the 'ntp master' command, the router's NTP stratum level will be 8. It is syncing to itself (its internal clock), so in that case you can say the internal clock's stratum is 7.
leaving comment for utoob algorythm
Much appreciated ;)
Thanks so much!
Thanks for watching :)
Thanks
please tell us the resources from which u prepare those lectures,
any References or books
thanks in advance
I already know the topics, so I mostly use documentation from the IEEE/IETF + Cisco documentation to make sure the details are correct.
Thanks for the video
Thanks for all your comments :)
Thank you Jeremy, will you cover CCNP course after this?
Probably, but I'm not 100% decided
Hello Jeremy, I would like to ask something about NTP. How can Routers, which are layer 3 devices, can communicate to a layer 7 level protocols? I am a bit confused about this. Maybe i misssed something.
Your course is great. It is the reason i started learning networking. Thanks
I think im kind of retarded but I'll give this question a crack lmfao. Routers just forward packets to the destination it needs to reach via a next hop address if it has. I don't think it cares about communicating with anyhting beyond its layer as layer 7 is purely created by hosts that need whatever is going on over their lol. The routers job is just to make sure stuff is getting where it needs to be.
16:30 The clocks in GPS satellites are atomic clocks
indeed they are
@@JeremysITLab Thanks for the series. I’m on day 45 now and feel confident that I have the minimum knowledge to pass the exam. I’ll finish out the series before testing and supplement as needed, but I can’t begin to express how valuable this [free] course has been.
I didn't really understand Quiz 3: Why did we select 9 instead of 8?
I live in a country that has daylight savings, and I have no idea when it begins and ends exactly because every clock in my home does it on its own. I had to look it up lol
Sir please make a video on how to configure a router from first
I explain how to configure routers in other videos
Thanks for the video and hardwork!!! Quick question. After tackling the ccna, what would you recommend next? I see videos where the devnet cert should be knocked out next, while others consider going straight for the ccnp, or even cloud certs.
CCNP, in my opinion. Depends on what kind of job you want, though.
Now Jeremy, I wouldn't say that loopback address and loopback interface are "totally" different....
@12:43 in the last should "name" & "recurring" be swapped 🤔
For the clock summer-time command does the name go before or after 'recurring'? You mentioned both at 12:36 and then in the listed commands at 12:45
@33:10 it should be R3 in the last line, shouldn't? 🤔
thanks Jeremy ,,KE
Thanks for watching :)
Brilliant.
u used bosom and CCNA Gold Bootcamp: for the ccna ? whats at this time the best choice ?
Waiting for QoS
Great video. Is it possible to set up NTP in fortigate firewall pointing out to data center controller?
heavy topic
It seems Packet Tracer does not allow for the configuration of Day Light Savings, nor does it allow for the clock update-calendar and clcok read-calendar commands
Thank you Jeremy Sir 🙏 Instead of using 127.127.1.1 address for master clock. Can we specify any other loopback address to use as it's NTP master clock.
Your answer is at 37:05 ;)
@@JeremysITLab Thank you sir🙏
Dear how many video still left to complete CCNA course and what is the second play list of practical are all same for the new CCNA course.
The course is about 70% complete. The second playlist was made for the previous version of the CCNA exam, but most of the videos are still relevant.
@@JeremysITLab thank u for providing information sir.
calendar is wrong: clock update -calendar
clock wrong: clock read-calendar
is ntp concept important for firewall or network security engineer...?
Yes! All devices should have accurate time and NTP can be a vulnerability, so security engineers should know it well.
On a Cisco WS-C3850-24P i don't have the "show calendar" option. Why is that?
How many days do you plan this series to have when complete?
Not 100% sure, but probably around 55.
Hi Jeremy, I would like to ask something, when we use ntp master command, the router will sync to its internal clock, the "internal" in this scenario means software clock or hardware calendar? thanks in advance
It'll sync to the software clock in this case
@@JeremysITLab thanks
#Configuration *Global Configuration*
*ntp server* _ip-address_ _[prefer]_ : Configures a Cisco device to synchronize its clock with a specific Network Time Protocol (NTP) server. The "ip-address" parameter is the IP address of the NTP server. The optional "prefer" keyword is used to indicate that this NTP server should be the primary source of time for the device.
*ntp peer* _ip-address_ : Configures a Cisco device to synchronize its clock with a specific NTP peer. The "ip-address" parameter is the IP address of the NTP peer.
*ntp update-calendar* : Updates the device's calendar with the current time obtained from the NTP server or peer.
*ntp master* _[stratum]_ : Configures a Cisco device as an NTP master. The optional "stratum" parameter is used to specify the stratum level of the device. The lower the stratum level, the more accurate the time source.
*ntp source* _interface_ : Specifies the interface from which the device should obtain its time source.
#Show *Privileged EXEC*
*show ntp associations* : Displays information about the NTP associations on a Cisco device. This includes the status of the associations, the IP address of the server or peer, and the stratum level.
*show ntp status* : Displays the current status of the NTP service on a Cisco device. This includes the current time, the time source, and the stratum level.
#Authentication *Global Configuration*
*ntp authenticate* : Enables NTP authentication on a Cisco device.
*ntp authentication-key* _key-number_ *md5* _key_ : Configures an NTP authentication key on a Cisco device. The "key-number" parameter is the number assigned to the key, "md5" specifies the type of key (MD5) and "key" is the key value.
*ntp trusted-key* _key-number_ : Specifies the NTP authentication key that the device should use.
*ntp server* _ip-address_ *key* _key-number_ : Configures a Cisco device to synchronize its clock with a specific NTP server and specify the key for authentication.
*ntp peer* _ip-address_ *key* _key-number_ : Configures a Cisco device to synchronize its clock with a specific NTP peer and specify the key for authentication.
#Clock *Global Configuration*
*clock summer-time* _zone_ { _date month year hh:mm date month year hh:mm_ | *recurring* _week day month hh:mm week day month hh:mm_ } _[offset]_ : Configure system to switch to automatically daylight saving time. Offset is the number of minutes to add during the summer time. Enter dates in ascending order.
*clock timezone* _zone hours-offset [minutes-offset]_ : To set the time zone for display.
Hello Jeremy,
I have question,
What is NTP Mode 6 Vulnerability and how can we solve it?
Uff!!! This video has a lot of info 😶🌫
Hello there!! I was wondering when this course would be completed or how many days are there in total? thanks
The course is about 70% complete. It will be finished this year.
tysm
13:05 NTP starts
Hhmm. I didn't understand why quiz 3 is A right answer =( I thought is C. Because NTP master equal 8 which we see in command line.
Hi jeremy i am asking can we get the slides that you explain from it will be very helpful
At 12:42, shouldn't it be R1(config)# clock summer-time name recurring start end [offset]
instead of
R1(config)# clock summer-time recurring name start end [offset]
?
Until it was said, I thought JST might be "Jeremy Standard Time". :D
Brother. If you feel comfortable can you tell me why you're living in Japan. While Canada is good country. Please please please I want to know.
Maybe it could be that he got a networking job like IT manager in Japan, so he would've moved to Japan. Also, I don't think he's gonna reply to your comment, because whenever I see most recent comments like before days or weeks, they ask a lots of question. There wasn't even one reply. He only replied to the super thanks comment. So I dont think he's gonna reply. But let's see.
Well done
Thank you!
The most boring part of the whole CCNA. Hopefully your video makes it stick in my head
Haha I actually like NTP!
For the NTP key-number does it have to match on both client and server? Obviously, the key itself has to be the same but can the numbers be different per machine?
Yeah I'm pretty sure they have to match too...try it out in packet tracer!
@@JeremysITLab yup they have to match on both client and server, thanks for making me try myself