WAN Connections
Understanding WAN Technologies
Wide-work
Need for WANs
WANs vs. LANs
WAN Access and the OSI Reference Model
WAN Devices
Routers
Terminal servers
Modems
DSU/CSU
working devices
ATM switches
Frame Relay switches
PSTN
Physical Layer: WANs
Serial Point-to-Point Connections
WAN—Multiple LANs
WAN Data-Link Protocols
HDLC
PPP
Frame Relay (LAPF)
ATM
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