Priscilla Oppenheimer wrote: > Here's a copy of the message I sent to CertificationZone over two weeks ago > about the ARP errors. I thought they would fix them. > > An ARP frame does not have an IP header. Figure 2 should show a real ARP > frame. Note that the destination is six sets of FFs (not the four in the > figure) and that there's no IP layer. > > Ethernet Header > Destination: FF:FF:FF:FF:FF:FF Ethernet Broadcast > Source: 00:00:0C:05:3E:80 > Protocol Type:0x0806 > ARP - Address Resolution Protocol > Hardware: 1 Ethernet (10Mb) > Protocol: 0x0800 IP > Hardware Address Length: 6 > Protocol Address Length: 4 > Operation: 1 ARP Request > Sender Hardware Address: 00:00:0C:05:3E:80 > Sender Internet Address: 172.16.10.1 > Target Hardware Address: 00:00:00:00:00:00 > Target Internet Address: 172.16.10.10 > > Figure 3 needs to be fixed also. A reply doesn't have an IP header either. > Does this matter? Yes. If you set a filter to capture just IP packets with > a protocol analyzer or debugged just IP packets on a router, for example, > you would miss all the ARPs since they aren't IP packets. Plus we expect > accuracy from CertificationZone! ;-) > > Priscilla > > ________________________ > > Priscilla Oppenheimer > http://www.priscilla.com Interesting... Thanks!!
Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=26644&t=25925 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
