Ethernet Addresses

• ifconfig eth0 from orca

• Each ethernet interface has a unique ethernet address provided by the manufacturer

• Ethernet addresses are 6 bytes shown as 6 hexadecimal values separated by colons

• Ethernet 0 on orca has address 00:C0:F0:1F:3C:27

• Packets sent on the orca subnet direct orca packets to that ethernet address

• Ethernet packets have header and data sections

• The header contains the source and destination ethernet addresses and a 2 byte packet type

• For IP packets the data area contains the IP packet which holds the IP source and destination address...

• To send to an IP address, a computer uses the address resolution protocol to determine a hardware address

• Output from "arp" on orca