What is
Serial Line Internet Protocol (SLIP)?
• 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.
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