On personal computers, SLIP has largely been replaced by the Point-to-Point Protocol (PPP), which is better engineered, has more features, and does not require its IP address configuration to be set before it is established.
On microcontrollers, however, SLIP is still the preferred way of encapsulating IP packets, due to its very small overhead.
[5] CSLIP has no effect on the data payload of a packet and is independent of any compression by the serial line modem used for transmission.
[8] The SLIP driver offers a special "6-bit" escaped mode to accommodate modems incapable of handling non-ASCII characters.
[9] The Linux slattach command (written independently) also has the ability to auto-detect CSLIP support.