The Serial Line Internet Protocol (SLIP) is an encapsulation of the Internet Protocol designed to work over serial ports and router connections. It is documented in .

<communications, protocol> (SLIP) Software allowing the Internet Protocol (IP), normally used on Ethernet, to be used over a serial line, e.g. an EIA-232 serial port connected to a modem. It is defined in RFC 1055. SLIP modifies a standard Internet datagram by appending a special SLIP END character to it, which allows datagrams to be distinguished as separate. SLIP requires a port configuration of 8 data bits, no parity, and EIA or {hardware flow control}. SLIP does not provide error detection, being reliant on other high-layer protocols for this. Over a particularly error-prone dial-up link therefore, SLIP on its own would not be satisfactory. A SLIP connection needs to have its IP address configuration set each time before it is established whereas {Point-to-Point Protocol} (PPP) can determine it automatically once it has started. See also SLiRP. (1995-04-30)

(SLIP) Serial Line Internet Protocol.

Compressed SLIP

<networking> (CSLIP) VanJacobsen TCP header compression. A version of SLIP using compression. CSLIP has no effect on the data portion of the packet and has nothing to do with compression by modem. It does reduce the TCP header from 40 bytes to 7 bytes, a noticeable difference when doing telnet with lots of little packets. CSLIP has no effect on UDP, only TCP. (1995-05-28)

Compressed [Additional explanations: headers] Serial Line Internet Protocol (Reference: SLIP, IP)

The Parallel Line Internet Protocol (PLIP) is a computer networking protocol for direct computer-to-computer communications using the parallel port normally used for connections to a printer.

Parallel Line Internet Protocol (Reference: IP), "Style: PL/IP"

<networking> (IP) The network layer for the TCP/IP protocol suite widely used on Ethernet networks, defined in STD 5, RFC 791. IP is a connectionless, best-effort packet switching protocol. It provides packet routing, fragmentation and re-assembly through the data link layer. IPv4 is the version in widespread use and IPv6 was just beginning to come into use in 2000 but is still not widespread by 2008. [Other versions? Dates?] (2000-12-19)

The Internet Protocol (IP) is the network layer communications protocol in the Internet protocol suite for relaying datagrams across network boundaries. Its routing function enables internetworking, and essentially establishes the Internet.