Most commonly, the Internet Protocol Control Protocol (IPCP) is used, although Internetwork Packet Exchange Control Protocol (IPXCP) and AppleTalk Control Protocol (ATCP) were once very popular.
Обычно, используется Internet Protocol Control Protocol (IPCP), хотя Internetwork Packet Exchange Control Protocol (IPXCP) и AppleTalk Control Protocol (ATCP) были когда-то популярны.