1ec8f24b7SThomas Gleixner# SPDX-License-Identifier: GPL-2.0-only 26a2e9b73SSam Ravnborg# 36a2e9b73SSam Ravnborg# LAPB Data Link Drive 46a2e9b73SSam Ravnborg# 56a2e9b73SSam Ravnborg 66a2e9b73SSam Ravnborgconfig LAPB 75ba0a3beSKees Cook tristate "LAPB Data Link Driver" 8*a7f7f624SMasahiro Yamada help 96a2e9b73SSam Ravnborg Link Access Procedure, Balanced (LAPB) is the data link layer (i.e. 106a2e9b73SSam Ravnborg the lower) part of the X.25 protocol. It offers a reliable 116a2e9b73SSam Ravnborg connection service to exchange data frames with one other host, and 126a2e9b73SSam Ravnborg it is used to transport higher level protocols (mostly X.25 Packet 136a2e9b73SSam Ravnborg Layer, the higher part of X.25, but others are possible as well). 146a2e9b73SSam Ravnborg Usually, LAPB is used with specialized X.21 network cards, but Linux 156a2e9b73SSam Ravnborg currently supports LAPB only over Ethernet connections. If you want 166a2e9b73SSam Ravnborg to use LAPB connections over Ethernet, say Y here and to "LAPB over 176a2e9b73SSam Ravnborg Ethernet driver" below. Read 1840e79150SMauro Carvalho Chehab <file:Documentation/networking/lapb-module.rst> for technical 196a2e9b73SSam Ravnborg details. 206a2e9b73SSam Ravnborg 216a2e9b73SSam Ravnborg To compile this driver as a module, choose M here: the 226a2e9b73SSam Ravnborg module will be called lapb. If unsure, say N. 23