ARP is a layer 2 function for MAC address resolution within the local network. Routing outside of the network occurs at layer 3 as a router looks at the IP address header and decides the best route to send it. Because routers operate at layer 3 they don't care about the MAC address. The local network has no knowledge of anything beyond the gateway.
Explaining with wireshark is just as important as defining the protocol! Thank you very much! I have a very basic question though and I hope some can answer it :) We know ARP resolves the Ip to MAC addresses and thats how it know the MAC address of a client but how does it know the Ip address in first place! In other words, how does it know it needs to resolve a particular Ip address? How did it get that Ip address?
@First Last "The default gateway gets the ARP request, recognizes that it is directed towards itself, and replies to the PC with its own MAC address by sending a DHCP reply." -----> Could you please confirm Is it ARP Reply or DHCP reply ?
brilliant @ 04:40 scratching beard is initiating
Ended abruptly
ARP is a layer 2 function for MAC address resolution within the local network. Routing outside of the network occurs at layer 3 as a router looks at the IP address header and decides the best route to send it. Because routers operate at layer 3 they don't care about the MAC address.
The local network has no knowledge of anything beyond the gateway.
Why is the first ARP Request from router not a broadcast? Why it is to intel laptop mac directly?
I think it was the previous entry when he was deleting the arp table. The first packet should start from packet no 3.
I imagine that the router sent a message to his computer in the time between running arp -d and refreshing the yahoo browser.
As ,i think I know all that I need to know now after watching this
how to configure snmp on fiberhome (fengine s4800) switch
thanks for explaining with wireshark :)
it is super explained now..
Can't thank you enough for making these extremly helpful videos for networking learners.
WTF, great tute!!!! thank you for sharing.
Excellent explanation with wireshark.
Muy buena explicación
Very very useful!! Thanks!!
hi, could please let me which simulator software should i use for learning.
Packet tracer is a great tool.
Very useful
Thank you..
this is the result of googling "wireshrek"
noroy noroy! za warduo wa saikyo no stando da!
Top man!
Explaining with wireshark is just as important as defining the protocol! Thank you very much! I have a very basic question though and I hope some can answer it :)
We know ARP resolves the Ip to MAC addresses and thats how it know the MAC address of a client but how does it know the Ip address in first place! In other words, how does it know it needs to resolve a particular Ip address? How did it get that Ip address?
Hi.
On my understanding, it depends on the situation.
But the most of the times, the IP address is provided by a DNS, which translates a URL to IP.
@First Last "The default gateway gets the ARP request, recognizes that it is directed towards itself, and replies to the PC with its own MAC address by sending a DHCP reply."
-----> Could you please confirm Is it ARP Reply or DHCP reply ?