Join Mike Meyers for an in-depth discussion in this video ICMP and IGMP, part of CompTIA Network+ (N10-006) Cert Prep: 4 Making TCP/IP Work.
- TCP and UDP are the big heavy lifters when it comes…to just about all the data we move on the internet.…However there are times when I don't really want…to send data so much as one computer I wanna talk…to another one just to verify status…or something kind of simplistic like that.…In these type of situations there's two…other protocols I wanna talk about.…The first one's called ICMP,…or Internet Control Message Protocol.…ICMP is a different animal than either TCP or UDP,…in that number one, it doesn't work…at the transport layer of the TCP IP model.…
It works at the IP layer.…The best way to explain this is…let's make ourselves a quick ICMP packet.…So as we take a look here first of all to turn this…into an ICMP packet I gotta get rid of stuff.…There are not port numbers with ICMP.…In fact that's the reason most people put ICMP…in the IP layers as opposed to the network layer because…ICMP has nothing to do with port numbers at all.…And here's the other crazy part, you ready?…There really isn't any data, all you're doing with an ICMP…
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Skill Level Beginner
Q: This course was updated on 06/20/2017. What changed?
A: New videos were added that cover Windows name resolution and the net command.