1. eeweb server
PC (web client)
Http/tcp/ip/ethernet
(src. IP address:
dst. IP address:
src. MAC address: 0a:11:23:45:0c:de
dst. MAC address: 1b:3d:23:75:9c:a7)
0a:11:23:45:0c:de
DNS reply
( )
DNS query/UDP/IP
(eeweb.poly.edu)
ARP( )
ARP reply (12:23:34:6f:1a:30)
ARP ( )
ARP reply(1b:3d:23:75:9c:a7) .4
.15
1b:3d:23:75:9c:a7 .3
12:23:34:6f:1a:30
DNS Server
PC web client, DNS server and eeweb server are all on the same ethernet LAN and same IP subnet.
PC client has the IP address of the DNS server ethernet card, but it does not have the MAC address