D

Index

[SYMBOL] [A] [B] [C] [D] [E] [F] [G] [H] [I] [K] [L] [M] [N] [O] [P] [Q] [R] [S] [T] [U] [V] [W] [X] [Y] [Z]

D (Delta) channel
    ISDN
         ISDN:D channel;signaling:ISDN:D channel
D channel
     testing 2nd
D channel (ISDN)
     Layer 1 2nd 3rd
         devices 2nd
         interfaces 2nd 3rd
     Layer 2
         LAPD frame format 2nd 3rd 4th 5th 6th
         logical link establishment 2nd
     Layer 3
         Q.931 message format 2nd 3rd 4th
D channels
     TDM
D/C (data/control) bit (Frame Relay Address field)
DARPA (Defense Advanced Research Projects Agency)
data centers 2nd
Data Encryption Standard
Data field (LAPD frames )
Data field (PPP frames)
data link connection identifiers
data link layer
     troubleshooting ISDN BRI 2nd 3rd 4th 5th 6th 7th 8th
data link layer (OSI model)
data link layer protocols
    PPP
         authentication phase 2nd 3rd
data link layer troubleshooting
     Frame Relay
         LMI issues 2nd 3rd 4th 5th 6th 7th 8th 9th 10th 11th 12th 13th 14th
         misconfigured PVCs 2nd 3rd 4th 5th 6th 7th 8th 9th
data link layer VPNs 2nd
     L2TP 2nd
     PPTP 2nd 3rd
data transmission
     over CATV
         standards 2nd 3rd 4th 5th
data-link layer protocols
     PPP
         Authentication phase
         frame fields 2nd
         LCP, troubleshooting 2nd 3rd 4th 5th 6th 7th 8th
         Link Dead phase
         Link Establishment phase 2nd
         Link Termination phase
         Network Layer Protocol phase
         troubleshooting
dB (decibel)
DBS
     BST
     IPA
     LEO satellitesLEO satellites
DBS (Direct Broadband Satellite)
DBS systems
     BST protocol
     FITFEEL protocol
     IPSec 2nd
     manipulating TCP stack 2nd
     performance
     VPNs 2nd
         bandwidth 2nd 3rd 4th
         error control coding
DDR 2nd
     configuring 2nd 3rd 4th 5th 6th
         with backup interfaces
         with dialer watch
         with floating static routes
     dialer profiles
         configuring 2nd 3rd 4th 5th 6th 7th 8th
    Windows 2000
         troubleshooting 2nd 3rd 4th 5th 6th 7th 8th 9th 10th
DDS (Dataphone Digital Service)
DE (discard eligible)
DE (discard eligible) bit (Frame Relay Address field)
debug bri command 2nd
debug information
     timestamping 2nd
debug interface serial command 2nd 3rd
debug isdn q931 command 2nd 3rd
debug ppp authentication command
debug ppp negotiation command 2nd 3rd
debugging
    Cisco Easy VPN client connection
         IPSec key events 2nd
     Frame Relay LMI 2nd
     Frame Relay serial interfaces 2nd
Defense Advanced Research Projects Agency
defining service levels
delivered erroneous frames
demand circuits (OSPF)
demodulation
dense mode (PIM)
     Frame Relay multicast configuration 2nd
design objectives
     of remote access VPNs 2nd
design parameters
    Frame Relay
         CIR 2nd 3rd 4th 5th 6th
design solutions
    ISDN
         hub and spoke
designing
    Frame Relay networks
         parameters 2nd
    ISDN networks
         IP pools 2nd 3rd 4th 5th
         MLP 2nd 3rd 4th 5th 6th
         MMP 2nd 3rd 4th 5th 6th 7th 8th 9th 10th 11th 12th
         NAT 2nd 3rd 4th 5th 6th 7th
         PAT 2nd 3rd 4th
         per- user configuration 2nd 3rd 4th
    remote access services
         provisioning enterprise services 2nd 3rd 4th 5th 6th 7th 8th 9th 10th 11th 12th 13th 14th 15th 16th
Destination Unreachable messages (ICMP) 2nd
detecting
     dirty phone lines 2nd
     shorts in modem cables
     source of frequent disconnections
devices
    AS5200 routers
         commands 2nd
    AS5300 routers
         commands 2nd 3rd 4th 5th 6th 7th
    AS5400 routers
         commands
     AS5x00 routers 2nd 3rd 4th
     cable modems
     codecs
     Frame Relay
     ISDN 2nd
         switch types 2nd
     modems
         56-k flex modems
         analog
         analog dialup services 2nd 3rd 4th 5th
         bandwidth 2nd
         cable modem services 2nd
         connection speeds
         digital
         malfunctioning 2nd
         PCM
         Shannon's limit
     repeaters
DH algorithm 2nd 3rd 4th
DHCP servers
    reachability
         verifying
dial peers
     creating 2nd
dial-back authentication
dial-in
    large-scale dial-in
         configuring 2nd 3rd 4th 5th 6th 7th 8th 9th
    PPP dial-in
         configuring 2nd 3rd 4th 5th 6th 7th 8th 9th 10th 11th 12th 13th 14th
         network design 2nd
    text dial-in
         configuring 2nd 3rd
         network design
    troubleshooting procedure
         verifying incoming connection type 2nd 3rd 4th
         verifying modem operability 2nd 3rd
         verifying PPP negotiation 2nd 3rd 4th 5th 6th 7th 8th 9th
dial-on demand backup routing
    configuring
         with backup interfaces
         with dialer watch
         with floating static routes
dial-out
     ISDN 2nd 3rd 4th
    large-scale
         network design 2nd
    large-scale dial-out
         configuring 2nd 3rd 4th
    PPP dial-out
         configuring 2nd 3rd 4th 5th
         network design
    text dial-out
         configuring 2nd 3rd 4th 5th 6th 7th 8th
         network design
     troubleshooting procedure 2nd 3rd 4th 5th 6th 7th 8th 9th
dial-up
    authentication
         PAP
         servers 2nd
     PPP
         Authentication phase
         frame fields 2nd
         Link Dead phase
         Link Establishment phase 2nd
         Link Termination phase
         Network Layer Protocol phase
         troubleshooting
dialer maps
dialer profiles 2nd
     configuring 2nd 3rd 4th 5th 6th 7th 8th
dialer watch
     DDR configuration
dialup
     800 toll-free numbers
    authentication time outs
         troubleshooting 2nd 3rd 4th
    disconnections
         troubleshooting 2nd 3rd
    retrains
         troubleshooting 2nd 3rd
dialup services
     analog 2nd 3rd 4th 5th
         limitations of 2nd
     Frame Relay 2nd
         benefits of 2nd
         limitations of
         standards 2nd
     ISDN
         benefits of 2nd 3rd
         limitations of
diffused-beam WLANs
digital modems
digital pads
     echo cancellation 2nd
digital sampling
     Nyquist's sampling theorem
digital transmissions
     clocking
digital-to-analog converters
digitalization
     of voice
Direct Broadband Satellite
direct-beam WLANs
dirty phone lines
     as source of slow line speeds 2nd
discard eligible (DE)
disconnections
     troubleshooting 2nd 3rd
Discrete Multi-Tone
displaying
     Cisco Easy VPN client status 2nd
     ISDN BRI service layers 2nd 3rd
distance vector routing protocols
     size estimate
DLCI
    mismatched settings
         troubleshooting 2nd 3rd 4th 5th 6th 7th 8th 9th 10th 11th
DLCIs
     assignments 2nd
     CIR
         aggregate CIR 2nd
         asymmetrical CIR
         flexible CIR
         zero CIR
     per interface limitations 2nd
DLCIs (data link connection identifiers)
     channel assignments 2nd
DMT
     CAP
     SF structure
DMT (Discrete Multi-Tone) 2nd 3rd
DOCSIS 2nd
DOCSIS (Data-Over-Cable Service Interface Specifications)
DOCSIS 1.1 standard
     satellite communications
DoD (Department of Defense) interconnection model 2nd
down interfaces
    Frame Relay
         new installs :troubleshooting 2nd
down protocol layer
    Frame Relay
         new installs:troubleshooting 2nd 3rd 4th 5th 6th
DPD (Dead Peer Detection) 2nd
dropped calls
    ISDN
         22 second issue, resolving 2nd 3rd 4th 5th 6th 7th 8th
DS0
DSL
     coding schemes 2nd
     PPoE
         discovery stage
         negotiations 2nd 3rd
         session stage
     xDSL services 2nd
         ADSL
         CDSL
         FDIs 2nd
         HDSL
         IDSL
         RADSL
         SDSL
         TDRs 2nd
         VDSL
DSLAMs
DSSS