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Home » Networking » Routing » What is Serial Line Internet Protocol (SLIP)?
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What is Serial Line Internet Protocol (SLIP)?

By Dinesh Thakur

• This protocol was developed by Rick Adams in 1984.

• The initial purpose of this protocol was to connect Sun workstation to the Internet over a dial-up line using modem.

• Using this protocol, workstations sends raw IP packets over the line with a flag byte (OXCO) at the end for framing purpose.

• If the flag byte occurs inside the IP packet, then character stuffing technique is used to solve this problem. For this a two byte sequence (OXDB, OXDC) is sent in its place.

• Although SLIP is the simple protocol but it has some major problems. These are:

1. It does not perform any error detection and correction.

2. SLIP support only IP (Internet Protocol). So it cannot be used for other networks that do not make use of IP (for e.g. Novell LANs).

3. It does not Support the allocation of dynamic IP address. Both the communication sites should be assigned a specific IP address before hand and both sites should know each other’s address.

4. SLIP does not provide any authentication. So both the communicating sites do not know with whom they are communicating.

5. SLIP is not an approved Internet standard; so many different and incompatible versions exist that makes networking difficult.

• The data format of SLIP is shown in fig.

Slip Data Format

• A special END character (equivalent to decimal 192) marks the end of data.

• If an End character occurs naturally in data, SLIP includes a special ESC character before the END character so that receiving computer does not prematurely stop receiving the packet.

You’ll also like:

  1. What is Transmission Control Protocol/Internet Protocol (TCP/IP)?
  2. What is ICMP (Internet Control Message Protocol)?
  3. (IP) Internet Protocol – What is Internet Protocol (IP)?
  4. IMAP4 (Internet message access protocol)
  5. IGMP – What is Internet Group Management Protocol (IGMP)?
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About Dinesh Thakur
Dinesh ThakurDinesh Thakur holds an B.C.A, MCDBA, MCSD certifications. Dinesh authors the hugely popular Computer Notes blog. Where he writes how-to guides around Computer fundamental , computer software, Computer programming, and web apps.

Dinesh Thakur is a Freelance Writer who helps different clients from all over the globe. Dinesh has written over 500+ blogs, 30+ eBooks, and 10000+ Posts for all types of clients.


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