1*4882a593Smuzhiyun# SPDX-License-Identifier: GPL-2.0-only 2*4882a593Smuzhiyun# 3*4882a593Smuzhiyun# LAPB Data Link Drive 4*4882a593Smuzhiyun# 5*4882a593Smuzhiyun 6*4882a593Smuzhiyunconfig LAPB 7*4882a593Smuzhiyun tristate "LAPB Data Link Driver" 8*4882a593Smuzhiyun help 9*4882a593Smuzhiyun Link Access Procedure, Balanced (LAPB) is the data link layer (i.e. 10*4882a593Smuzhiyun the lower) part of the X.25 protocol. It offers a reliable 11*4882a593Smuzhiyun connection service to exchange data frames with one other host, and 12*4882a593Smuzhiyun it is used to transport higher level protocols (mostly X.25 Packet 13*4882a593Smuzhiyun Layer, the higher part of X.25, but others are possible as well). 14*4882a593Smuzhiyun Usually, LAPB is used with specialized X.21 network cards, but Linux 15*4882a593Smuzhiyun currently supports LAPB only over Ethernet connections. If you want 16*4882a593Smuzhiyun to use LAPB connections over Ethernet, say Y here and to "LAPB over 17*4882a593Smuzhiyun Ethernet driver" below. Read 18*4882a593Smuzhiyun <file:Documentation/networking/lapb-module.rst> for technical 19*4882a593Smuzhiyun details. 20*4882a593Smuzhiyun 21*4882a593Smuzhiyun To compile this driver as a module, choose M here: the 22*4882a593Smuzhiyun module will be called lapb. If unsure, say N. 23