Index_D

D

D (signal) channel in ISDN, 324, 519

D-type connectors, 275, 275, 521

DASs (dual-attached stations), 330

Data Encryption Standard (DES), 386

Data Link layer, 56, 64, 64, 519

concepts in, 64–66

devices in, 73–75, 74–75

Project 802, 67–73

data packets, 519

Data Service Units (DSUs), 39, 519

datagrams, 111, 519

DB-15 connectors, 22

DB-25 connectors, 272, 273

dead zones in protocol switching, 367, 367

DEC (Digital Equipment Corporation) Alpha AXP architecture, 229

decimal-to-binary conversion, 131

default gateways, 81, 519

definition files for viruses, 438–439

delta channels (D channels), 324, 519

demarcation points, 322, 520

demilitarized zones (DMZs), 366, 366, 392

Denial of Service (DoS) attacks, 377–378, 520

Department of Defense (DoD) model, 110, 110, 521

Department of Defense (DoD) security standards, 380

certified operating systems and networks, 382–384

Trusted Computer systems, 380–381

Trusted Network Interpretation, 381

DES (Data Encryption Standard), 386

design issues

in Novell NetWare, 221–222, 222

in TCP/IP, 108–109

destination fields in IPX/SPX, 120

destination port numbers in TCP/IP, 111, 120

Device Manager, 280, 320

device placement in installation, 258

DHCP (Dynamic Host Configuration Protocol), 145, 292, 332, 522

diagnostics, 287–288, 493, 537

dial tone, 323

Dial-Up Networking dialog box, 333

dialogs, 85, 520

differential backups, 430–431, 431

Diffie, Whitfield, 388

Diffie-Hellman algorithm, 387

digital connections, 278

Digital Equipment Corporation (DEC) Alpha AXP architecture, 229

Digital Subscriber Line (DSL), 38, 325, 520

DIN connectors, 61

DIP (dual inline package) switches, 284–285, 285

directories, 520

Directory in Novell NetWare, 219–220

directory services, 520

in Novell NetWare, 218–221, 219–220

in Windows NT, 230–232, 231–232

Disable WINS Resolution option, 147

disabling accounts, 357–358, 394

disaster recovery, 520. See also fault tolerance

discards, netstat for, 170

disk drivers, NLMs for, 214

disk striping, 520

disk subsystems in installation, 272–273, 273

disk system fault tolerance, 419–420

disk duplexing, 421, 422

disk mirroring, 420–421, 421

disk striping, 422–423, 422

RAID, 423–424

distance limits of cable types, 33–34

distance vector routing, 80, 88, 520

distributed WANs, 5

DIX connectors, 22, 520

DMZs (demilitarized zones), 366, 366, 392

DNS (Domain Name Services), 85, 89, 138–140, 254, 332, 521

DNS Configuration tab, 148–150, 149, 468–469, 469

DNS records, 141

DNS Server Search Order field, 149

DNS servers, 521

DNS zones, 521

documentation

in installation, 265

for NICs, 285

of troubleshooting, 470

DoD (Department of Defense) model, 110, 110, 521

DoD (Department of Defense) security standards, 380

certified operating systems and networks, 382–384

Trusted Computer systems, 380–381

Trusted Network Interpretation, 381

Domain Name Services (DNS), 85, 89, 138–140, 254, 332, 521

Domain Suffix Search Order field, 150

domains, 521

in DNS configuration, 149–150

in Internet, 136–137

in Windows NT, 230–231, 231

door lock policies, 391

DoS (Denial of Service) attacks, 377–378, 520

dotted decimal notation, 78, 87, 124, 521

downloading files, 183–184

drivers

NIC, 288

NLMs for, 214

drop cables, 12

.DSK extension, 214

DSL (Digital Subscriber Line), 38, 325, 520

DSUs (Data Service Units), 39, 519

dual-attached stations (DASs), 330

dual inline package (DIP) switches, 284–285, 285

dumb terminals

defined, 521

in ICA, 336

duplexed hard drives, 421, 422, 521

duplicate IP addresses, 166, 188

duplicate servers, 411, 522

dynamic ARP entries, 165, 522

Dynamic Host Configuration Protocol (DHCP), 145, 292, 332, 522

dynamic packet filtering, 368, 369, 522

dynamic routing, 79–80, 522

dynamic state lists, 368, 369

dynamically allocated ports, 122, 522