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WAN module, 199
security risks, 490
WANs. See wide area networks (WANs)
web resources, to request IP v6 addresses, 298
weighted fair queuing, 415, 415–416, 416
wide area networks (WANs), 4, 590
connection to Internet, 260, 260–261
exam essentials, 245
hardware, 10, 10–11
options, 218–222
leased networks, 219–221
private networks, 219
public networks, 221–222
planning and design, 222–230
autonomous switching, 226–227
Cisco Express Forwarding (CEF),229–230
criteria, 223–224
distributed switching, 227
Fast switching, 226
implementation issues, 224–225
NetFlow switching, 228
optimum switching, 227
PDIOO methodology, 222–223
process switching, 226
silicon switching, 227
protocols, 230–244
Data Link protocols, 33–34
DSL (digital subscriber line),243–244, 538
Frame Relay, 237–243. See also Frame Relay
HDLC (High-Level Data Link Control) protocol, 33, 231–232, 237, 548
ISDN, 232–236. See also ISDN(Integrated Services Digital Network)
PPP (Point-to-Point Protocol), 34,236–237, 571
SDLC (Synchronous Data Link Control) protocol, 33, 231, 577
redundant configurations, 203–205
wildcard mask, 590
window (data transmission), 25
sizes for TCP/IP, 26
Windows 2000 workstations, IP v6 use in, 298
WinSock, 591
workgroup switching, 591
World Wide Web, Application layer for, 17
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