Really easy to understand, clear and not at all boring, just watching them all again before i start trying a few labs. probably not all the info you need to pass ccna but it definitly gives you a clear basis and understanding to work on, BUT ITS FREEEEEEEE!!!!!! thanks guys keep at it!
Such a kind guy. Explain everything clear i understood everything and wrote it on a paper to save it in my brain. Only watching videos won't really help on understanding.
A small tip: did you notice how your background (a radial gradient) looks like a bunch of circles in different colors, even though that's not how you intended it to look? I've also had that problem and there's a way to fix that. The phenomenon is called "banding". If you open or recreate the background in a graphics program like Photoshop, Affinity Designer or the Gimp, you can add a bit noise to break up the effect.
1:24 little error at this point " this means it can't receive data and receive data at the same time" you meant "send and receive" i suppose. Also, love the short informative vids! I am doing my revision after completing the course and it feels relaxing to just sit through these and do nothing else :P
Hello I am thrown off by the terms, do you define a router as different then a modem? Or as the same thing? And a WAP is different then a router? Thanks for your videos.
Thanks for the video. Is it possible to connect any external HDDs to a switch or router and have a PC as well as a mac access them same time? What format the HDDs should be?
@@Certbros Thanks you sir, but there 's still something bothering me is that if a router using Mac address can we connect the router directly to devices without using switch ?
So helpful thanks a lot. Also, can you dive deeper into bridge and switch way of saving the source mac address and sending to the destination mac address. Thank you for thus content! Can you make a full and complete video on using wireshark in networking? You are truely helpful and you will be great channel keep up the good work.
Wikipedia says "Half-duplex or semiduplex system, both parties can communicate with each other, but NOT SIMULTANEOUSLY. the communication is one direction at a time" (copy paste) and you said (0:58) Half-duplex can send data and receive data at the same time without collision. Idiot me said wow i'm confused hahahahahaha
Sorry if this is a dumb question, i think the term domain might be throwing my off slightly Is a collision domain separate to the network? like a physical space inside the cable or is it just a term to describe that collisions can occur on that part of the network? For example, every connection from a switch to a device is a collision domain but from one device to another is not a collision domain because its controlled by the switch? Also why in an enterprise situation would the switch and router by separate devices? Is this to do with workload and efficiency?
No such thing as a dumb question Chris! A collision domain is just a term to describe an area of a network where collision could occur. Bigger networks will need more switches and maybe more routers. As networks grow, its physically not ideal to have switches and routers built together. I hope this helps.
when a device communicates with other device they create something like virtual channel through which the data flows. so it doesn't effect the rest of devices and they can start a communication of their own without having to wait for the first two to end.
like that you explained that the switch replaces them both, and wondering if a switch is the right choice for a home network that has a cable box, wifi router, and like 5 devices that might be watching HD videos or playing/hosting games at the same time. I want to get those 5 devices off of the wifi, and onto a switch. the wifi router is on the long side of the house, and would rather noth buy 5 50foot wires to connect them.
I have a question on the switch: What if i have 8 computers connected through a switch and on computer #1 i want to send a message to all other computers or just a few computers. What would happen?
When computers need to send a message to all other computers, this is called a broadcast message. The destination MAC will be ffff.ffff.ffff. This tells the switch to forward the frame out of all ports expect the receiving one. If it's just a few computers, then it might send a multicast message.
How does a switch know where the destination computer is without using an IP address? If I want to send a packet from computer A to computer C, what information do I give the switch to know to send it to computer C. I didn't think that packets could contain MAC address which is why I'm confused. Can you explain?
I'll try and answer this as best I can in a comment. Switches send frames, and frames contain source and destination MAC addresses. Switches learn which MAC address belongs to which port by checking the source MAC address when it receives a frame. Then it adds them to a 'MAC Address table' which lists the MAC address and receiving port number. When computer A sends a frame to computer B, the switch checks the destination MAC address against its MAC address table, if it's listed then it will forward the frame out of the listed port number. If its not listed in the MAC address table, it will send the frame out of every port. Does this help at all?
Any chance you could help, my isp gave me a modem/router, after hooking it up I connected my Asus n55u and used dual wan, I connect all of my kids stuff to this so I can control what they see and for how long they have access to the internet, on my main router from isp there is one ip assigned to secondary router, which in turn gives all the devices there own ips on the second device. I know people talk about dhcp etc so was wondering if I should do something else for it to run more efficiently, I also realised that my speed on secondary router is a lot better than my main router? Any ideas
I'm not sure I understand your question but I'll give it a go! From what I understand, you are setup like this ISP----ISP Router---Asus n55u---Devices is that right? The simply solution would be to replace your ISP router with your Asus, but this depends is your ISP will let you do that. If not, maybe you could run your Asus as an Access Point only? Maybe someone with a similar setup will stop by...
CertBros isp router -> Asus Router -> devices. I cannot use the Asus router in replacement of my isp router as it's an asdl and my new internet is vdsl I think those are the correct terms. I just know the Asus router has one up address on the isp router and I didn't know if this would cause any conflict as the Asus router is giving out its own ip addresses to the devices connected to it. What does it mean by making it an access point? Would I lose functions of the Asus router such as parental controls and qos for each device if I make it an access point. All seems to be running fine the way I have it I just don't want to run into any future problems
Funny that you talks about the OSI Levels but forget to say so many at all things you show. Just _one_ example: So have a modern router most an switch and a bridge inside. The bridge inside IS the connect over Layer 2 - Layer 1 (port at your provider). At other side it goes over Layer 3 to the router. At other side of the router it flows over Layer 3 - Layer 2 to the build-in Switch. This works over Layer 2 - Layer 1 to the LAN Cable. Some router works as AP too - so they send Layer 3 - Layer 2 (Bridge to WiFi). Layer 2 - Layer 3 (- Layer 4) as AP WiFi to send data over air. Some old router have a build-in Modem (Layer 3 - Layer 2 - Layer 1) to modulate and demodulate an analog signal for connect your provider. Then do you forget to say that some Switches can works on Layer 3 too! BTW: In the history as we old guys "create" the OSI Layer in the 80's we put in Layer 1 ONLY the physical cable inside. So the passive Hub can works on Layer 1, but the active Hub (most Hubs was that!) use Layer 2a, then they use a chipset IEEE 802.3. So a Switch works 2b or 3, depends on what function are build in. The orginal names are L1 physical, L2 data link, L3 network, L4 transport, L5 sessions, L6 presentation and L7 application. This Book printed 1992 but informations are from the 80's, IEEE 802.3 was approved in 1985!
Thanks for the detailed feedback! This video is a general overview and therefore purposely kept simple. What you are referring to is a bit more advanced and maybe better suited to another video.
+CertBros That right OSI Layer not easy. But real products sometimes do not works only in one OSI Layer or they need higher layer. Most newer products often combinated products too.
Let say you have this setup PC1PC2, this would be classed as one collision domain, meaning PC2 may have to wait for PC1 to stop sending data before PC2 can send its data, otherwise this could cause a collision.
Really easy to understand, clear and not at all boring, just watching them all again before i start trying a few labs. probably not all the info you need to pass ccna but it definitly gives you a clear basis and understanding to work on, BUT ITS FREEEEEEEE!!!!!! thanks guys keep at it!
Thanks Chris! I really appreciate the comment! Great to hear you liked the video.
Hey man you think this series is a good series for network+ too?
@@cjmurray7892 Yes, i watch this series and other series of network plus and actuallt there are small differences
This was incredibly clear, thank you!
You're welcome Jade. Glad you liked it 👍
Such a kind guy. Explain everything clear i understood everything and wrote it on a paper to save it in my brain. Only watching videos won't really help on understanding.
Class 12 computer science student here! these really helped me revise my computer networking portion.. Thanks!
Very helpful for my upcoming network exam. Thanks alot!
No problem. Good luck with your exam. You'll smash it!
I like it how every time I have a networking question, you have a video for it, whether it be new or old.
Haha! Great to hear! Hopefully I can keep making videos to keep up with your questions 😁
@@Certbros Get ready to make some videos because they never stop😜
@@themistoclesnelson2163 Haha! I'll try my best!
A small tip: did you notice how your background (a radial gradient) looks like a bunch of circles in different colors, even though that's not how you intended it to look? I've also had that problem and there's a way to fix that.
The phenomenon is called "banding". If you open or recreate the background in a graphics program like Photoshop, Affinity Designer or the Gimp, you can add a bit noise to break up the effect.
Thanks Pieter! I'll try that out next time. Great channel by the way.
This is the best explanation I've seen on the differentiation between network devices. Thanks!
Great to hear! Thanks Wilson.
this was amazing.. now i can say that i know the basics of networking devices..very undersandable..thank you sir
Thanks Adnan!
What a lifesaver! Thanks.
You're welcome! Thanks.
Such a clear explanation, I understood everything. This video has a incredible didatic.
Thank you :)
Thanks Vinicius!
Awesome video! Thank you for breaking down such complex concepts making them easier to understand. Thumbs up to you!!
Thanks Piyush!
Harry kane teaching cisco
At 00:38 you mean to say "except the transmitting one."
But it is very clear in the animation anyway.
Very helpful for A-Level computer science. Thanks.
Thanks Miss Megan! Good luck with the A levels!
Hubs and switches are used to create network while router is used to connect networks
That's a great way of thinking about it 👌
Easy to understand. Thank you CertBros. Thumps up (y)
You're welcome Leon. Thanks for the comment and thumps up.
really clear video, i now know more about how this stuff works thank you
lil bro just saved me and my competition tmrw
1:24 little error at this point " this means it can't receive data and receive data at the same time" you meant "send and receive" i suppose. Also, love the short informative vids! I am doing my revision after completing the course and it feels relaxing to just sit through these and do nothing else :P
Every term needed to understand networking is explained clearly. I always come back to Certbros to grasp terms and so clearly.
Wow! How informative! Thank you!
Thanks Carlo!
Hello I am thrown off by the terms, do you define a router as different then a modem? Or as the same thing? And a WAP is different then a router?
Thanks for your videos.
Thanks for the video. Is it possible to connect any external HDDs to a switch or router and have a PC as well as a mac access them same time? What format the HDDs should be?
No problem. I think what you are looking for is a NAS (network attached storage) drive.
Kind of. I bought Seagate Backup plus hub, can I use it to connect to a switch and use with both mac and PC?
OK. I couldn't say for sure but you could probably share it somehow. Might need to be connected to a computer though.
amazing, i really could understand and i am no longer clueless. thanks!
Thanks for the crispy clear explanation!
No problem. Thanks for the comment. Glad you liked it 👍
Very nice explaination... I really like. Thnks❤
You are welcome 😊
thank you this helped me for my exam and i got an a thank you!
Super helpful! Love it. Thank you.
Thanks Stephen!
5:31 does a router use Mac address too ? some tell that they are not...
Yes absolutely. Although we refer to routers as layer 3 devices, they still use mac addresses and other layer 2 technologies as well.
@@Certbros Thanks you sir, but there 's still something bothering me is that if a router using Mac address can we connect the router directly to devices without using switch ?
In 20 years everyone needs to understand these concepts with the rate technology is transitioning towards IP. Thanks for a simple explanation.
This vedio is definately the thing which i was willing to know.
thanks @CertBros
You're welcome
Clear and concise. Thank you!
So nicely explained, Thank you!
Thank you Anuksha! Glad you liked it 👍
well done, after spending time networking this video is excellent.
Thank you thank you. You helped me alot. Now I can answer my module in css subject
Glad to hear it! You're welcome. 👍
Your videos are amazing! Thank you!
You're welcome! Thanks for the comment!
Just Loved all ur videos ! Wanna say Whooooo ! Now I know it ! 👍 Thanks a lot
HAHA Love it!! Thank you.
01:22 - Can't receive data and receive data at the same time?
Qt Animu good spot! Thanks.
So helpful thanks a lot.
Also, can you dive deeper into bridge and switch way of saving the source mac address and sending to the destination mac address.
Thank you for thus content!
Can you make a full and complete video on using wireshark in networking?
You are truely helpful and you will be great channel keep up the good work.
Great suggestion! I'll add these to my list 👍
Terrific vid! Thank you for making this so understandable!
Please some one briefly explain the 1- collision, 2-collision and multiple collision
Wikipedia says "Half-duplex or semiduplex system, both parties can communicate with each other, but NOT SIMULTANEOUSLY. the communication is one direction at a time" (copy paste) and you said (0:58) Half-duplex can send data and receive data at the same time without collision. Idiot me said wow i'm confused hahahahahaha
I say it cant send and receive. The audio is pretty terrible though.
Sorry if this is a dumb question, i think the term domain might be throwing my off slightly
Is a collision domain separate to the network? like a physical space inside the cable or is it just a term to describe that collisions can occur on that part of the network?
For example, every connection from a switch to a device is a collision domain but from one device to another is not a collision domain because its controlled by the switch?
Also why in an enterprise situation would the switch and router by separate devices? Is this to do with workload and efficiency?
No such thing as a dumb question Chris!
A collision domain is just a term to describe an area of a network where collision could occur.
Bigger networks will need more switches and maybe more routers. As networks grow, its physically not ideal to have switches and routers built together.
I hope this helps.
Very clear and to the point. Thanks.
Amazing video! Thank you CertBros!
The voice is boring but it is so useful!!!
You came here for voice or knowledge?
Voice ain't boring but the microphone is making you feel so
Are these physical devices or some software?
I use internet in my home i only a laptop and the wifi modem,
Crystal clear explanation. thanks
Thanks for breaking this down 😊
You're welcome!
This was so useful and understandable,
Hope we will have more, explained like this.
Thank you!!
+M.Tariq Ghafori Thanks! More videos on the way.
Great Explanation thank you bro😊
Thanks man! Glad you liked it!
Very informative compared to my instructors speedy process lol cyber security analyst here I come!!! 😀
those darn rooters!
Hi!
You stated that a switch has multiple collision domains. Could you elaborate on what is meant by that?
when a device communicates with other device they create something like virtual channel through which the data flows. so it doesn't effect the rest of devices and they can start a communication of their own without having to wait for the first two to end.
Is internal networking the same thing as LAN?
Thanks for explanation, kind regards.
You are welcome! Thank you for the comment!
nice one....easy to understand..
Programming Tutorials Thanks!
like that you explained that the switch replaces them both, and wondering if a switch is the right choice for a home network that has a cable box, wifi router, and like 5 devices that might be watching HD videos or playing/hosting games at the same time. I want to get those 5 devices off of the wifi, and onto a switch. the wifi router is on the long side of the house, and would rather noth buy 5 50foot wires to connect them.
Yes a switch is perfect for this! Or you could get a WiFi repeater.
Awesome video, best explanation. Thanks 💌
I have a question on the switch: What if i have 8 computers connected through a switch and on computer #1 i want to send a message to all other computers or just a few computers. What would happen?
When computers need to send a message to all other computers, this is called a broadcast message. The destination MAC will be ffff.ffff.ffff. This tells the switch to forward the frame out of all ports expect the receiving one.
If it's just a few computers, then it might send a multicast message.
Thanks. Quite explicit
Thanks!
absolutely deadly tutorial!!!!!!!!!
Damn you're channel is good
Thanks a Lot Brother for this help. Really appreciate it .
very good, nice and clear !
Thank you!
Great video, well explained & easy to follow. Thank you
Thanks Daniel! Glad you enjoyed it!
How does a switch know where the destination computer is without using an IP address? If I want to send a packet from computer A to computer C, what information do I give the switch to know to send it to computer C. I didn't think that packets could contain MAC address which is why I'm confused.
Can you explain?
I'll try and answer this as best I can in a comment.
Switches send frames, and frames contain source and destination MAC addresses. Switches learn which MAC address belongs to which port by checking the source MAC address when it receives a frame. Then it adds them to a 'MAC Address table' which lists the MAC address and receiving port number.
When computer A sends a frame to computer B, the switch checks the destination MAC address against its MAC address table, if it's listed then it will forward the frame out of the listed port number. If its not listed in the MAC address table, it will send the frame out of every port.
Does this help at all?
I think that clears it up. Thanks for replying!
Dawning Knight Awesome! No problem bro
Thank you so much sir.. ❤️❤️❤️
Capacity of de devices in the case of Hub and Switches is divided in the number of ports?
Congratulations🎉🎁🎁
can you explain clearly fewer ports. thank you
Thumbs up, thank you so much!!
Thanks!!
Thanks sir 🤩🤩
You're welcome Shaswata!
My teacher recommended it💀💀💀☠☠
Me 2😭💀
Any chance you could help, my isp gave me a modem/router, after hooking it up I connected my Asus n55u and used dual wan, I connect all of my kids stuff to this so I can control what they see and for how long they have access to the internet, on my main router from isp there is one ip assigned to secondary router, which in turn gives all the devices there own ips on the second device. I know people talk about dhcp etc so was wondering if I should do something else for it to run more efficiently, I also realised that my speed on secondary router is a lot better than my main router? Any ideas
I'm not sure I understand your question but I'll give it a go!
From what I understand, you are setup like this ISP----ISP Router---Asus n55u---Devices is that right?
The simply solution would be to replace your ISP router with your Asus, but this depends is your ISP will let you do that. If not, maybe you could run your Asus as an Access Point only?
Maybe someone with a similar setup will stop by...
CertBros isp router -> Asus Router -> devices. I cannot use the Asus router in replacement of my isp router as it's an asdl and my new internet is vdsl I think those are the correct terms. I just know the Asus router has one up address on the isp router and I didn't know if this would cause any conflict as the Asus router is giving out its own ip addresses to the devices connected to it. What does it mean by making it an access point? Would I lose functions of the Asus router such as parental controls and qos for each device if I make it an access point. All seems to be running fine the way I have it I just don't want to run into any future problems
Really great!
Thanks! Glad you liked it.
nice one...worth watching
Thanks
Thanks for this video :-) 👍
Great video thank you
Thanks for the comment! Glad you liked it.
How do I send data to another pc connected to the same access point?
That depends. It could be the same as normal unless you are some type of guest WiFi, then there are probably security measures in place.
Amazing channel
Good video, I like it. 👍
Thank you 👍
Wow super lecture
Funny that you talks about the OSI Levels but forget to say so many at all things you show. Just _one_ example: So have a modern router most an switch and a bridge inside. The bridge inside IS the connect over Layer 2 - Layer 1 (port at your provider). At other side it goes over Layer 3 to the router. At other side of the router it flows over Layer 3 - Layer 2 to the build-in Switch. This works over Layer 2 - Layer 1 to the LAN Cable. Some router works as AP too - so they send Layer 3 - Layer 2 (Bridge to WiFi). Layer 2 - Layer 3 (- Layer 4) as AP WiFi to send data over air. Some old router have a build-in Modem (Layer 3 - Layer 2 - Layer 1) to modulate and demodulate an analog signal for connect your provider.
Then do you forget to say that some Switches can works on Layer 3 too!
BTW: In the history as we old guys "create" the OSI Layer in the 80's we put in Layer 1 ONLY the physical cable inside. So the passive Hub can works on Layer 1, but the active Hub (most Hubs was that!) use Layer 2a, then they use a chipset IEEE 802.3. So a Switch works 2b or 3, depends on what function are build in. The orginal names are L1 physical, L2 data link, L3 network, L4 transport, L5 sessions, L6 presentation and L7 application. This Book printed 1992 but informations are from the 80's, IEEE 802.3 was approved in 1985!
Thanks for the detailed feedback!
This video is a general overview and therefore purposely kept simple. What you are referring to is a bit more advanced and maybe better suited to another video.
+CertBros That right OSI Layer not easy. But real products sometimes do not works only in one OSI Layer or they need higher layer. Most newer products often combinated products too.
thank you sir :)
You're welcome
Can you make a video about DNS?
Thanks Arjay. I'll make a DNS video very soon.
Good basic information
Thanks!
The energy and audio doesn’t match the first video. Where am I? 😜
Hi
HUBS do not create new collision domain.but you explained it has a 1 collision domain ? please explain.
Let say you have this setup PC1PC2, this would be classed as one collision domain, meaning PC2 may have to wait for PC1 to stop sending data before PC2 can send its data, otherwise this could cause a collision.
Thank you
What’s a node optical hub?
Awesome i just subscribed
I thought the modem is the off and on-ramp to the outside world? not the router?
a modem modulates and de-modulates data between the internet and a computer. These days modems will come built into a router in your home
peopole confuse the two and call a router a modem when in fact, they are two seperate devices
thnxx its the best video
Thanks. You're welcome.
But first you said it can send and recieve, and in the overview you then say it can`t?
Half-Duplex = Can't send and receive at the same time
Full-Duplex = Can send and receive at the same time
Hope this clears it up for you.
Aaaah, ok yeah now i get it :)
Thank you sir so much
You're weclome👍
very good, thanks
Thanks!
What is an example of the type of data A is sending to C? I don’t understand. I feel so dumb!
what's a modem???
So realize easily to understand
Thank you!