Index_H
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H
H channel, 548
H.323 protocol, 493, 547
hackers, 479, 547–548
targets of, 482–485
half-duplex mode, 19, 548
for Ethernet, 102, 102
handshake, 548
hardware address, 548
hardware for LANs, 6–10
ATM switches, 10, 11
bridges, 7, 7–8, 527
and collisions, 70
design considerations, 74
segmentation with, 70–71, 71
vs. switches, 74
gateways, 9, 547
hubs, 8, 8, 549
and collisions, 70
repeaters, 6, 6–7, 574
and collisions, 70
maximum distance for end nodeswith, 106
routers, 9, 9. See also routers
switches, 8, 89, 585. See also Layer 2 switching
vs. bridges, 74
and collisions, 70
for LANs, 86–87
real world scenario on configuration, 88
redundant links between, 77–78
security, 482–483
hardware for WANs, 10, 10–11
HDLC (High-Level Data Link Control) protocol, 33, 231–232, 237, 548
HDSL (high bit-rate DSL), 244
header compression, 413
header translation, 297
Hello packets, 321–322, 335
helper address, 548
hierarchical addressing, 278, 548
hierarchical network topology, 190–197. See also Enterprise Composite Network Model
benefits, 191–193
in case study, 509, 510
three-layer, 193–197
access layer, 196–197
core layer, 194–195
distribution layer, 195–196
high bit-rate DSL (HDSL), 244
High-Level Data Link Control (HDLC) protocol, 33, 231–232, 548
High-Speed Communication Interface(HSCI), 549
High-Speed Serial Interface (HSSI), 549
HIP (HSSI Interface Processor), 548
History group in RMON, 439
hold-down timers, in IGRP, 328
holddown, 321, 332, 548–549
hop count, 319, 549
OSPF and, 357
hops, 318, 549
host-based IDS (HIDS) systems, 486, 549
Host group in RMON, 439
Host-to-Host layer (DOD), 121
protocols, 124–127
hosts, security for, 485
HostTopN group in RMON, 439
Hot Standby Router Protocol (HSRP), 202, 202, 203, 549
HSCI (High-Speed CommunicationInterface), 549
HSRP (Hot Standby Router Protocol), 202, 202, 203, 549
HSSI (High-Speed Serial Interface), 549
HSSI Interface Processor (HIP), 548
hubs, 8, 8, 549
and collisions, 70
hybrid network, 549
hybrid routing, balanced, 324–325
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EAN: 2147483647
Pages: 201