Services and TCP ports

 

 

# Protocol Protocols Full Name
 

143 − 252

 

Unassigned

 

Unassigned

 

253

   

Use for experimentation and testing

 

254

   

Use for experimentation and testing

 

255

 

Reserved

 

 

Further information can be found by researching RFC 5237.

 

Protocol Number

IP is responsible for more than the address that it is most commonly associated with and there are a number of associated protocols that make up the Network Layer. While there are not 256 of them, the field that identifies them is a numeric value between 0 and 256.

In the Internet Protocol version 4 (IPv4) [RFC791] there is a field called “Protocol” to identify the next level protocol. This is an 8 bit field. In Internet Protocol version 6 (IPv6) [RFC2460], this field is called the “Next Header” field.

 

Protocol Numbers

 

# Protocol Protocols Full Name
 

0

 

HOPOPT

 

IPv6 Hop-by-Hop Option

 

1

 

ICMP

 

Internet Control Message Protocol

 

2

 

IGMP

 

Internet Group Management

 

3

 

GGP

 

Gateway-to-Gateway

 

4

 

IPv4

 

IPv4 encapsulation Protocol

 

5

 

ST

 

Stream

 

6

 

TCP

 

Transmission Control Protocol

 

7

 

CBT

 

CBT

 

8

 

EGP

 

Exterior Gateway Protocol

 

9

 

IGP

 

Any private interior gateway (used by Cisco for their IGRP)

 

10

 

BBN-RCC-MON

 

BBN RCC Monitoring

 

11

 

NVP-II

 

Network Voice Protocol

 

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