Network Sales and Services Handbook (Cisco Press Networking Technology)

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D (data) channel 

DACS (Digital Access and Cross-Connect Systems) 

DACS (Digital Access Cross-Connect Switch) 

data encapsulation

    encapsulation

        OSI Reference model:encapsulation;layers of OSI Reference Model:encapsulation 

data rates:cable modems

    cable modems:data rates

        CATV:cable modems:data rates 

data transfer mode (PVCs) 

database description packets (OSPF) 

datagrams:fragmentation

    MTU:overloading 

dedicated access 

dedicated local access:customer premise configuration

    network local access:customer premise configuration

        NTUs (network termination units):placement of;NIUs (network interface units):placement of 

dedicated local access:IXC dedicated

    IXC dedicated access

        network local access:dedicated:IXC dedicated  2nd  3rd  4th 

dedicated local access:LEC dedicated

    LEC dedicated access

        network local access:dedicated:LEC dedicated 

        network local access:dedicated:LEC dedicated;local access:dedicated 

dedicated local access:punch-down blocks

    punch-down blocks

        network local access:punchdown blocks  2nd 

default gateways 

default routes 

delay

    routing:metrics:delay

        metrics:delay 

des 

DES (Data Encryption Standard)

    encryption:DES 

deterministic networks 

devices 

    smart cards 

devices:CSU/DSU

    CSU/DSU

        communication equipment:CSU/DSU 

devices:DTE/DCE interfaces

    DTE/DCE interfaces

        communication equipment:DTE/DCE equipment 

devices:DTE/DCE interfaces:HIPPI

    DTE/DCE interfaces:HIPPI

        communication equipment:DTE/DCE equipment:HIPPI;HIPPI (High-Performance Parallel Interface) 

devices:DTE/DCE interfaces:HSSI

    DTE/DCE interfaces:HSSI

        communication equipment:DTE/DCE equipment:HSSI;HSSI (High-Speed Serial Interface) 

devices:DTE/DCE interfaces:RS-232C

    DTE/DCE interfaces:RS-232C

        communication equipment:DTE/DCE equipment:RS-232C;RS-232C standard  2nd 

devices:DTE/DCE interfaces:RS-422/449

    DTE/DCE interfaces:RS-422/449

        communication equipment:DTE/DCE equipment:RS-422/449;RS-422/449 standards 

devices:DTE/DCE interfaces:V.35

    DTE/DCE interfaces:V.35

        communication equipment:DTE/DCE equipment:V.35;V.35 standards 

devices:DTE/DCE interfaces:V.90

    DTE/DCE interfaces:V.90

        communication equipment:DTE/DCE equipment:V.90;V.90standards 

devices:multiplexers

    multiplexers

        communication equipment:multiplexers 

devices:network addresses versus name

    network addresses:versus device name

        addresses:network addresses:versus device name 

devices\:CSU/DSU

    CSU/DSU

        communication equipment\:CSU/DSU 

DHCP (Dynamic Host Configuration Protocol) 

dictionary attacks

    attacks:dictionary 

DID (Direct Inward Dialing) 

DiffServ

    QoS:DiffServ 

diffusing computation 

Dijkstra Algorithm 

Disabled state (STP) 

discard-eligible cells

    cells:discard-eligible 

discretionary 

distance vector algorithms

    Bellman-Ford algorithms 

distance vector routing protocols 

    IGRP  [See IGRP ]

distance-vector routing protocols

    RIP  [See RIP]

DLCIs (data-link connection identifiers) 

DLCIs:local significance

    PVCs:DLCIs:local significance 

DLSw+ (Data Link Switching Plus) 

DNS (Domain Name System) 

DOCSIS (Data Over Cable Service Interface Specification) 

DOD (Direct Outward Dialing) 

dotted decimal notation 

Down state (OSPF)

    routers:OSPF:states 

downstream neighbors 

    LANs:Token Ring:downstream neighbor

        Token Ring:downstream neighbor;IEEE 802.5:downstream neighbor 

DRs (designated routers) 

DSL  [See also xDSL ]

    ADSL

        standards 

DSL (Digital Subscriber Line)

    xDSL 

DSLAM (DSL Access Multiplexer) 

DTR (Dedicated Token Ring)

    LANs:Token Ring:DTR

        Token Ring:DTR;IEEE 802.5:DTR 

DUAL (Diffusing Update Algorithm)

    EIGRP:DUAL

        route selection process:EIGRP:DUAL 

dual rings 

duplex modes

    PVCs:duplex modes

        virtual circuits:PVCs:duplex modes 

DWDM (Dense Wave Division Multiplexing)

    fiber optics:DWDM 

DWDM (Dense Wave Division Multiplexing):implementations

    fiber optics:DWDM:implementations

        bandwidth:DWDM implementations 

DWDM:optical amplifier

    fiber optics:DWDM:optical amplifier 

DXC (digital cross connect system) 

dynamic load balancing

    RIP:dynamic load balancing 

dynamic routing algorithms 

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