Index_H

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H

H.323, 119–22

capability exchange feature, 122

codec specification support, 121

defined, 119

gatekeepers, 120

multicast units (MCUs), 121

network topology, 120

protocol stack, 120

SIP vs., 123

terminals, 119

Hard zones, 86

Help desk, 52

Hierarchical storage management (HSM), 44–45, 77–79

in SANs, 79

solutions, 77

storage virtualization, 79, 94–96

High-speed packet networks, 225–54

ATM, 231–39

conclusion, 253–54

frame relay, 225–31

introduction, 225

IP, 239–53

High-speed token ring (HSTR), 17–18

autonegotiation and, 18

backbone segment, 18

defined, 17

mixing, 17

See also Token ring

Hubs

10BaseT, 8–9

ARCnet, 19–20

SAN, 85–86

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