Please Whitelist This Site?

I know everyone hates ads. But please understand that I am providing premium content for free that takes hundreds of hours of time to research and write. I don't want to go to a pay-only model like some sites, but when more and more people block ads, I end up working for free. And I have a family to support, just like you. :)

If you like The TCP/IP Guide, please consider the download version. It's priced very economically and you can read all of it in a convenient format without ads.

If you want to use this site for free, I'd be grateful if you could add the site to the whitelist for Adblock. To do so, just open the Adblock menu and select "Disable on tcpipguide.com". Or go to the Tools menu and select "Adblock Plus Preferences...". Then click "Add Filter..." at the bottom, and add this string: "@@||tcpipguide.com^$document". Then just click OK.

Thanks for your understanding!

Sincerely, Charles Kozierok
Author and Publisher, The TCP/IP Guide


NOTE: Using software to mass-download the site degrades the server and is prohibited.
If you want to read The TCP/IP Guide offline, please consider licensing it. Thank you.

The Book is Here... and Now On Sale!

Searchable, convenient, complete TCP/IP information.
The TCP/IP Guide

Custom Search







Table Of Contents  The TCP/IP Guide
 9  TCP/IP Protocol Suite and Architecture

Previous Topic/Section
TCP/IP Architecture and the TCP/IP Model
Previous Page
Pages in Current Topic/Section
12
3
4
Next Page
TCP/IP Lower-Layer (Interface, Internet and Transport) Protocols (OSI Layers 2, 3 and 4)
Next Topic/Section

TCP/IP Protocols
(Page 3 of 4)

Network Layer (OSI Layer 3) Protocols

The very important network layer contains the Internet Protocol and several related and support protocols, as shown in Table 21.


Table 21: TCP/IP Protocols: Network Layer (OSI Layer 3)

Protocol Name

Protocol Abbr.

Description

Internet Protocol, Internet Protocol Version 6

IP, IPv6

Provides encapsulation and connectionless delivery of transport layer messages over a TCP/IP network. Also responsible for addressing and routing functions.

IP Network Address Translation

IP NAT

Allows addresses on a private network to be automatically translated to different addresses on a public network, providing address sharing and security benefits. (Note that some people don’t consider IP NAT to be a protocol in the strict sense of that word.)

IP Security

IPSec

A set of IP-related protocols that improve the security of IP transmissions.

Internet Protocol Mobility Support

Mobile IP

Resolves certain problems with IP associated with mobile devices.

Internet Control Message Protocol

ICMP/ICMPv4, ICMPv6

A “support protocol” for IP and IPv6 that provides error-reporting and information request-and-reply capabilities to hosts.

Neighbor Discovery Protocol

ND

A new “support protocol” for IPv6 that includes several functions performed by ARP and ICMP in conventional IP.

Routing Information Protocol, Open Shortest Path First, Gateway-to-Gateway Protocol, HELLO Protocol, Interior Gateway Routing Protocol, Enhanced Interior Gateway Routing Protocol, Border Gateway Protocol, Exterior Gateway Protocol

RIP, OSPF, GGP, HELLO, IGRP, EIGRP, BGP, EGP

Protocols used to support the routing of IP datagrams and the exchange of routing information.


Host-to-Host Transport Layer (OSI Layer 4) Protocols

The transport layer contains the essential protocols TCP and UDP, as shown in Table 22.


Table 22: TCP/IP Protocols: Host-to-Host Transport Layer (OSI Layer 4)

Protocol Name

Protocol Abbr.

Description

Transmission Control Protocol

TCP

The main transport layer protocol for TCP/IP. Establishes and manages connections between devices and ensures reliable and flow-controlled delivery of data using IP.

User Datagram Protocol

UDP

A transport protocol that can be considered a “severely stripped-down” version of TCP. It is used to send data in a simple way between application processes, without the many reliability and flow management features of TCP, but often with greater efficiency.


Previous Topic/Section
TCP/IP Architecture and the TCP/IP Model
Previous Page
Pages in Current Topic/Section
12
3
4
Next Page
TCP/IP Lower-Layer (Interface, Internet and Transport) Protocols (OSI Layers 2, 3 and 4)
Next Topic/Section

If you find The TCP/IP Guide useful, please consider making a small Paypal donation to help the site, using one of the buttons below. You can also donate a custom amount using the far right button (not less than $1 please, or PayPal gets most/all of your money!) In lieu of a larger donation, you may wish to consider purchasing a download license of The TCP/IP Guide. Thanks for your support!
Donate $2
Donate $5
Donate $10
Donate $20
Donate $30
Donate: $



Home - Table Of Contents - Contact Us

The TCP/IP Guide (http://www.TCPIPGuide.com)
Version 3.0 - Version Date: September 20, 2005

Copyright 2001-2005 Charles M. Kozierok. All Rights Reserved.
Not responsible for any loss resulting from the use of this site.