o_194vq34qgtp417n414cr173812r2a.pdf

xmodem command 399
VTP operation, 77-78
vtp pruning, 98
vtp version 2, 98
vulnerabilities, 270
W
WAN
components of, 309
connections, 165
circuit-switched connections, 314-316
dedicated connections, 314
Internet connections, 317-319
packet-switched connections, 315-317
WAN link options, 319-320
data-link protocols, 312
devices, 310
physical layer standards, 311
PVC, 313
SVC, 313
switching, 312-313
WAN implementations,
troubleshooting, 349
Layer 1 problems, 350
Layer 2 problems, 350-351
Layer 3 problems, 351-352
WAN link options, 319-320
WAN switches, 310
WANs (wide-area networks), 7
war drivers, wireless security risks, 257
WEP (Wired Equivalent Privacy), 258, 261
white hats, 267
Wi-Fi Alliance, 253
Wi-Fi Protected Access (WPA), 258, 261
WiMAX (Worldwide Interoperability for
Microwave Access), 319
windowing, 25
Windows PC
configuring to use DHCP, 123
testing
connectivity to default gateways, 63
connectivity to destinations, 64
TCP/IP stacks, 63
tracing routes, 65
Wired Equivalent Privacy (WEP),
258, 261
wireless access points, 261
wireless coverage areas, 256
wireless encoding channels, 255
wireless frequencies, 254
wireless LAN. See WLAN
wireless modes of operation, 254
wireless security risks, 257
wireless security standards, 258
wireless standards, 253
WLAN
implementing, 261
checklist for, 262-264
modes of operation, 254
speed and frequency reference, 256
standards for, 254
troubleshooting, 264
word help, 48
Worldwide Interoperability for
Microwave Access (WiMAX), 319
worms, 272
WPA (Wi-Fi Protected Access), 258, 261
write erase command, 51
X–Y–Z
X.21, 311
X.25, packet-switched connections
(WAN), 315
Xmodem, recovering IOS images, 187-
188
xmodem command, 187