Index_H

H

hacker tools, 376

IP spoofing, 376, 377

Ping of Death, 377

SYN floods, 378

WinNuke, 377–378

HAL (Hardware Abstraction Layer), 228

half-duplex communications, 5

.HAM extension, 214

Hard Disk Not Found message, 437

Hardware Abstraction Layer (HAL), 228

hardware addresses, 525

in Data Link layer, 64–65

in IPX/SPX, 119

Hardware Compatibility List (HCL), 233

hardware diagnostics, 287–288

hardware loopbacks, 288, 491, 491, 525

hardware problems vs. software, 461–462

hardware requirements

for Novell NetWare, 211–212

for remote access, 318–320

for Windows NT, 233

HCL (Hardware Compatibility List), 233

HDSL (High Data-Rate Digital Subscriber Line), 325

header checksum field, 115

headers

IP, 114, 114

IPX/SPX, 120

TCP, 112–113, 112

heartbeats, 408, 525

Hellman, Martin, 388

heuristic scanning, 438

High Data-Rate Digital Subscriber Line (HDSL), 325

histories, password, 363–364

hop counts, 270, 525

hops, 80, 525

Host field, 149

Host-to-Host layer, 111, 526

hosts, 8, 525

in DNS configuration, 149

in TCP/IP, 87

for telnet, 193

HOSTS file, 138

hot-pluggable PCI cards, 211

hot sites, 407–411

hot swapping disk subsystems, 271

HTML (Hypertext Markup Language), 526

HTTP (Hypertext Transfer Protocol), 118, 526

HTTP proxies, 370–371

hubs, 35, 526

in installation, 268–269

MDI/MDX port setting on, 464

in Physical layer, 62–63, 62

in star topologies, 14, 58

switching, 75, 75

humidity, 264, 496

hybrid mesh topology networks, 16

Hypertext Markup Language (HTML), 526

Hypertext Transfer Protocol (HTTP), 118, 526