IP Protocol Numbers

Decimal

Key word

Protocol

0

Reserved

1

ICMP

Internet Control Message Protocol

2

IGMP

Internet Group Management

Protocol

4

ST

Stream Protocol

5

TCP

Transmission Control Protocol

8

EGP

Exterior Gateway Protocol

9

IGP

Interior Gateway Protocol

17

UDP

User Datagram Protocol

Previous slide

Next slide

Back to first slide

View graphic version