Port is the process in the network layer code
socket = ip + port
Application layer:
- http Hypertext Transfer Protocol
- telnet remote login
- smtp Simple Mail Transfer Protocol
- ftp Text Transfer Protocol
Transport Layer:
- tcp Transmission Control Protocol
- udp User Datagram Protocol
Network layer:
- ip Internet Protocol
- ICMP Internet Control Message Protocol
- IGMP Internet Group Management Protocol
Link Layer:
- ARP ARP
- RARP Reverse Address Resolution Protocol