3.2.2 Operation of Routers (1/2)
nEach network connection has associated with it an ARP
module if it is connected to a broadcast network such as Ethernet
nARP: Address Resolution Protocol. Used
to find the physical
address. Creates a cache in which
it stores all its IP to physical address mappings.
nIP routing tables identify what to do
with each packet (i.e.,
what interface to use for transmitting
the datagram).