protocol layers Flashcards
1
Q
why layering?
A
- simplify the identification of a complex system’s pieces
- simplify maintenance
- modules can be updated indipendently
2
Q
internet layer, their role, packet name for each one
A
- APPLICATION: supporting network applications (messages)
- TRANSPORT: process-process data transfer (segments)
- NETWORK: routing of datagrams from source to destination (datagram)
- LINK: data transfer between neighboring
network elements (frames) - PHYSICAL: bits “on the wire” (bits)
