index_D

D

database servers, 349350, 376, 377, 380382

databases

message-enabled applications and, 407408

SQL and, 350351

threaded conversation, 408412

DataClub, 365366

datagrams, 201

Data-Link layer

access methods and, 103

described, 6, 11

frame types and, 106

protocols for, 99152

DDCMP (Digital Data Communications Protocol), 11

"demon dialers," 571

DEN (Directory-Enabled Networks), 170, 490

Department of Defense (DoD), 155

DES (data encryption standard), 560

desktop, managing, 504508

DFT (Distributed Function Terminal), 460

DHCP (Dynamic Host Configuration Protocol), 172176

dial-up internetworking, 471475,

Differentiated Services, 206211

Terms and conditions, 208209

Diffie-Hellman model, 561, 562

digital data, 2428

digital lines, 33

digital signals, 2425, 33

directories, 354366, 489491

disk duplexing , 615

DMA (Direct Memory Access), 313

DMI (Desktop Management Interface), 504508

DMT (Discrete Multitone), 28

DNS (Domain Name System), 384

DoD (Department of Defense), 155

DoS (Denial of Service) 187, 605

DOS, 354, 370, 371, 373, 463

drivers, 507

DS0 (digital signal, level zero), 34

DS3 interface, 130131

DSF (Dispersion Shifted Fiber) 6869

DSLs (Digital Subscriber Lines), 5461, 138139, 143144

DSS (Digital Signature Standard), 563

DSSS (Direct Sequence Spread Spectrum), 306308

DSUs (data service units), 35, 3742

DTDs (document type definitions), 267268

DWDM (Dense Wave Division Multiplexing), 8182