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.
PPP Overview, History and Benefits
(Page 3 of 3)
PPP Advantages and Benefits
A list of PPP's strengths reads very
much like a list of SLIP's weaknesses, which I explained in detail in
topic on SLIP. Some of the specific benefits
of PPP compared to SLIP include:
- A more comprehensive framing mechanism, compared
to the single END character in SLIP.
- Specification of the encapsulated protocol, to
allow multiple layer three protocols to be multiplexed on a single link.
- Error detection for each transmitted frame through
the use of a CRC code in each frame header.
- A robust mechanism for negotiating link parameters,
including the maximum frame size permitted.
- A method for testing links before datagram transmission
takes place, and monitoring link quality.
- Support for authentication of the connection
using multiple authentication protocols.
- Support for additional optional features, including
compression, encryption and link aggregation (allowing two devices to
use multiple physical links as if they were a single, higher-performance
The proliferation of serial links,
especially for dial-up Internet access, has led to widespread use of
PPP. It is now one of the most popular layer two WAN technologies in
the networking world, and has replaced SLIP as the standard for serial
connections on all but legacy implementations. While most often associated
with dial-up modem use, PPP can run across any similar type of physical
layer link. For example, it is often used to provide layer two functionality
on ISDN B channels.
Key Concept: PPP is a complete link layer protocol suite for devices using TCP/IP, which provides framing, encapsulation, authentication, quality monitoring and other features to enable robust operation of TCP/IP over a variety of physical layer connections.
A key advantage of PPP is that it
is an extensible protocol suite. Over the years new protocols
have been added to the suite, to provide additional features or capabilities.
For example, PPP is designed not to use just a single authentication
protocol, but to allow a choice of which protocol is used for this purpose.
PPP's success has even led to the
development of derivative protocols like PPP over Ethernet (PPPoE) and
PPP over ATM (PPPoA). These actually layer PPP over existing data link
layer technologies, which shows you how valued PPP's features areeven
when a layer two technology is already in use, applying PPP on top provides
authentication and management benefits for services like DSL.
|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!|
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.