Glossary of Terms 273
DDR (1): Dial-on-demand routing
DDR (2): Dual data rate RAM
DES: Data Encryption Standard
DHCP: Dynamic Host Configuration Protocol
DIMM: Dual Inline Memory Module
DIX: Digital-Intel-Xerox
DLC: Data Link Control
DLCI: Data Link Connection Identifier (Frame Relay)
DMT: Discrete multi-tone
DMZ: Demilitarized zone
DNA SCP: Digital Network Architecture Session Control Protocol (DECnet)
DNIC: Data Network Identification Code (X.25)
DNS: Domain Name Server
DQDB: Distributed Queue Dual Bus (SMDS)
DR: Designated router
DRAM: Dynamic random access memory
DRP: Disaster recovery plan
DS-0: Digital Signal Level 0 (64 kb)
DS-1: Digital Signal Level 1 (1.544 Mb)
DS-3: Digital Signal Level 3 (45 Mb)
DSA: Digital Signature Algorithm
DSAP: Destination Service ...