9
FIT100
IP -- Like Using Postcards
Information
is sent across the Internet using IP -- Cerf uses postcard analogy
•Break
message into fixed size units
•Form IP packets with destination address, sequence number
and content
•Each
makes its way separately to destination, possibly taking different routes
• Reassembled at destination forming msg
Taking separate routes lets packets by-pass congestion and out-of-service
switches
addr # data