Join Mike Meyers for an in-depth discussion in this video Introduction to ARP, part of CompTIA Network+ (N10-006) Cert Prep: 3 The World of TCP/IP.
- I'm a computer and I've got this IP packet…that I want to send to another computer…on my broadcast domain.…Now to do that, I can't just send…an IP packet by itself.…I'm running, I don't know, say Gigabit Ethernet,…so I need to put MAC addresses…and make an Ethernet frame to put…this IP packet inside of.…So to do that, I'm gonna have to get the MAC address…of the other computer so that I can go ahead,…make an Ethernet frame out of the whole shebang…and send it out so that that right computer can get it.…
Now to do that, I've got a problem.…And the problem is if this is me over here…and I want to send it to this guy,…I may know his IP address because I've got an IP packet,…but I don't know his MAC address.…So what I'm gonna have to do…is go through a process called ARP.…ARPing is a broadcast that sends out…onto a network that says I know your IP address.…If you have this IP address, please respond back.…So let me show you how all this works.…All right, now I've got my small network here.…I've gone ahead and thrown some IP addresses…
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Skill Level Intermediate
Q: This course was updated on 06/20/2017. What changed?
A: The following topic was updated: subnetting with CIDR.