Analysis on PPP and SLIP protocols

Recently, many netizens have proposed the WAN (PPP/SLIP) Interface content. Here we have collected some information to help you understand the relevant content. Next let's take a detailed look at the specific content. I think you will be able to understand it after reading the article.

SLIP Protocol

Serial Communication Protocol

Serial Line Internet Protcol

SLIP is the IP address of a serial line. It is used to run TCP/IP addresses on a point-to-point serial line. It is just a data packaging protocol:

SLIP defines a series of characters for packaging an IP package on a serial line. However, SLIP does not provide addressing or encapsulation.

And does not provide error detection/correction. Therefore, the Protocol is simple and easy to implement.

The Protocol SLIP defines two special characters: END and ESC. END is octal decimal number 300 ),

ESC is an octal number of 333 decimal number of 219). It is irrelevant to the ESCape character in the ASCII code.

After the packet is sent, SLIP checks the data in the IP package. If the character is the same as the END character, it takes the numbers of ESC and octal bytes.

These two bytes are replaced by 334. If they are the same as ESC characters, they are replaced by ESC characters and Octal numbers 335. When the last

After the character is sent, one END character will be sent.

SLIP implementation is very simple, but due to its simplicity, it lacks some important functions, such as

The computer must know the IP address of the other party to perform the correct routing. SLIP does not provide the address negotiation mechanism. When you use

When SLIP is used to dial to a vro, the address allocation may be dynamic. The vro needs to assign an IP address to the dial-up host.

SLIP has no type field, so SLIP can only be used by one protocol. Error Detection/correction because the SLIP line is relatively

Slow, it is costly to resend a package, so if SLIP can provide error detection/correction, the efficiency will be improved. Cannot improve

Line utilization, which can be squashed using Van Jacob's TCP/IP header.

From: http://www.unixresources.net/linux/clf/newbie/archive/00/00/08/99/89974.html#article89974

Open the windows optimization master and select the network system information tab. The "network adapter | Realtek RTL8139/810x Family Fast Ethernet NIC" and "network adapter WAN (PPP/SLIP) Interface" are displayed ", what do they mean ?? I cannot access the Internet when I don't have a "network adapter WAN (PPP/SLIP) Interface". It's good to restart the network. I don't want to start it again. What should I do? Please advise me. The answer is easy to understand and detailed :)

Two network connections on your system! The first is your network card, and the other is a virtual network card of the dial-up software)

The first one is the connection between your Nic and the cat,

The next one is the PPPOE Virtual Connection established by your cat and Telecommunications Bureau.

You cannot access the Internet without dialing. We recommend that you restart it!

From: http://zhidao.baidu.com/question/80567703.html? Fr = qrl & fr2 = query

What is the difference between PPP and SLIP in windows?

PPP is commonly used, point-to-point, point-to-point connection, and the IP address is not fixed.

SLIP is selected only for UNIX hosts and is rarely used now. The client must assign a fixed IP address.

The history of SLIP is earlier than that of PPP, and its Protocol is simple and easy to deploy. It is especially suitable for small-sized environment networks, but its disadvantage is also significant. Compared with it, SLIP has the following advantages:

1. PPP can negotiate IP addresses, and SLIP needs to be specified statically;

2. Many options can be negotiated during the LCP control process of PPP, which increases reliability and management, but also brings complexity issues;

3. PPP supports multiple network layer protocols, while SLIP only supports IP addresses;

4. the PPP authentication process supports powerful CHAP, such as MD5) methods, while SLIP can only be used for plaintext passwords;

5. PPP can be used to verify the integrity of training routes;

6. Both support some expansion technologies, such as compressing TCP;