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!

The whole site in one document for easy reference!
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
1
2
34
Next Page
 TCP/IP Lower-Layer (Interface, Internet and Transport) Protocols (OSI Layers 2, 3 and 4)
Next Topic/Section

TCP/IP Protocols
(Page 2 of 4)

Network Interface Layer (OSI Layer 2) Protocols

TCP/IP includes two protocols at the network interface layer, SLIP and PPP, which are described in Table 19.


Table 19: TCP/IP Protocols: Network Interface Layer (OSI Layer 2)

Protocol Name

Protocol Abbr.

Description

Serial Line Internet Protocol (SLIP)

SLIP

Provides basic TCP/IP functionality by creating a layer-two connection between two devices over a serial line.

Point-to-Point Protocol

PPP

Provides layer-two connectivity like SLIP, but is much more sophisticated and capable. PPP is itself a suite of protocols (“sub-protocols” if you will) that allow for functions such as authentication, data encapsulation, encryption and aggregation, facilitating TCP/IP operation over WAN links.

Network Interface / Network Layer (“OSI Layer 2/3”) Protocols

Table 20 describes ARP and RARP, the “oddballs” of the TCP/IP suite. In some ways they belong in both layer two and layer three, and in other ways neither. They really serve to link together the network interface layer and the internet layer. For this reason, I really believe they belong between these two and call them “layer connection” protocols. See the section devoted to these protocols and their unique layer for more on this issue.


Table 20: TCP/IP Protocols: Network Interface / Network Layer (“OSI Layer 2/3”)

Protocol Name

Protocol Abbr.

Description

Address Resolution Protocol

ARP

Used to map layer three IP addresses to layer two physical network addresses.

Reverse Address Resolution Protocol

RARP

Determines the layer three address of a machine from its layer two address. Now mostly superseded by BOOTP and DHCP.

Previous Topic/Section
TCP/IP Architecture and the TCP/IP Model
Previous Page
Pages in Current Topic/Section
1
2
34
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.