Packet (Digital) Switching
- Packets- sampling the analog/voice or using digital
- Address
- ID for where in message sample is from
- Code to verify integrity of message
- Message
- Switches/nodes along the path-
- Initial node-
- cuts up message into packets-
- feeds to network
- re-sends messages when asked
- Switching Node/s
- Knows 'state of neighboring network'
- Sends packet onto open or most efficient line- at that
moment
- End point Node
- Accepts the packets
- Re-assembles packets in proper order
- Tests integrity of packets and their completeness: (1)
ask to resend packet/s or (2) convert to final analog signal