Lab 3‐1 ARP observation tech journal - Dleifnesor/NET-150 GitHub Wiki

a LAN allows connections of devices on the same local network

devices on a LAN can communicate "NIC to NIC" in a LAN, NIC's will only pay attention to packets with it's own MAC address as the destination address

when a packet is being routed through networks to get to the destination IP address, the destination MAC address changes as it travels, the source and destination IP address stays the same.

commands used:

ping (ip address) -- sends a packet to test if a packet can be recieved and confirmed to an address

arp -a -- works on both linux and windows(shows the mac addresses of connected network devices)

ip -s -s neigh flush all -- linux (flushes the ARP cache)

Problems encountered: didnt get an ARP request when i pinged my desk neighbor, solved by flushing cache and reopening wireshark. to dump cache, use this command >ip -s -s neigh flush all< >arp -d< did not work for me for some reason

FOR WINDOWS!!: if you need to dump the arp cache use >netsh interface ip delete arpcache< you need to run CMD as admin tho to get it to work