TCP/IP

The Internet Layer breaks data into datagrams. Examples: IP, AppletTalk, NetBEUI.

Each datagram (packet) is sent independently of the others and travels the Internet on its own path.

Function of the bits in an IP datagram packet, using TCP.

The transport layer is implemented by either TCP or UDP.
- The Transmission Control Protocol make sure that all packets are received, and in order. It uses numbering and re-sending. RFC 761
- User datagrams allow lost and unordered packets. It is thus faster than TCP. RFC 768