• Flow control
• Error control

Transport Layer

• Node-to-Node delivery

L1, L2에서의 명명

• Host-to-Host delivery

Network layer is responsible for delivery of datagram between two hosts.

• Process-to-Process delivery

어느 프로그램에서 보내서, 어느 프로그램이 받는지

Addressing

• Data Link Layer에서는 destination MAC address
• Network Layer에서는 IP address