PDF of this tutorialATM
asynchronous transfer mode
CHAP
challenge handshake authentication protocol
GRE
generic routing encapsulation
IETF
Internet Engineering Task Force
IKE
Internet key exchange
IPSec
Internet protocol security protocol
IPX
Internet packet exchange
ISDN
integrated services digital network
ISP
Internet service provider
IT
information technology
L2F
Layer 2 forwarding
L2TP
Layer 2 tunneling protocol
LAN
local area network
MPPE
Microsoft point-to-point encryption
NetBEUI
network basic input/output system extended user interface
OSI
open systems interconnection
PAP
password authentication protocol
POP
point of presence
PPP
point-to-point protocol
PPTP
point-to-point tunneling protocol
PVC
permanent virtual circuit
RADIUS
remote authentication dial-in user service
TACACS
terminal access controller access control system
TCP/IP
transmission control protocol/Internet protocol
VPN
virtual private network
WAN
wide area network
xDSL
digital subscriber line
