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31 Cards in this Set

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  • Back
High-Level Data Link Control
HDLC
DTE
Data Terminal Equipment
DCE
Data-Circuit Terminating Equipment
End of the WAN provider side of the communication facility
DCE
in a WAN the main function of a router is?
To trasmit data using layer 3 addresses
Where does routing occur
At the network layer
When a router uses the physical and data link layer standards and protocols that are associated with WANs, it is
Operating as a WAN device
In a WAN the router provides
Connections between various WAN physical and data link standards
WAN physical layer standard for interface between DTE and DCE, is essentially the same as EIA/TIA-232
v.24
ITU standard for high-speed synchronous data exchange, in U.S. it is the used by most routers and DSUs to connect to T-1
V.35
ITU standard for serial comunicatrion over synchronous digital lines, used mainly in Europe and Japan
X.21
ITU-T electrical and mechanical specifications for connections between telephone company equipment and DTE using BNC connectors and operating at E1 data rates
G.703
Refers to two electrical implementations of EIA/TIA-449: RS-422 (for balanced transmission) and RS-423 (for unbalanced transmission).
EIA-530
A communication protocol, offered by telephone companies, that permits telephone networks to carry data, voice, and other source traffic.
Integrated Services Digital Network
ISDN
Integrated Services Digital Network
Digital WAN carrier facilities
T1, T3, E1, and E3 layer 1
Digital Subscriber Line (collectively)
xDSL layer1
Synchronuous Optical Network
SONET (OC-3, OC-12, OC-48, OC-192)layer1
Bit-oriented synchronous data link layer protocol developed by ISO.
High-level data link control (HDLC) layer 2
layer 2
High-level data link control
HDLC
layer 2
switched data link layer protocol that handles multiple virtual circuits using HDLC encapsulation between connected devices
Frame Relay
layer 2
provides router-to-router and host-to-network connections over synchronous and asynchronous circuits.
Point-to-Point Protocol (PPP)
layer 2
a bit-oriented, full-duplex serial protocol
Synchronous Data Link Control (SDLC)
layer 2
A standard protocol for point-to-point serial connections using a variation of Transmission Control Protocol/Internet Protocol (TCP/IP).
Serial Line Internet Protocol (SLIP)
layer 2
a data link layer protocol, and packet level protocol
X.25
layer 2
Asynchronous transfer mode
ATM
standard for cell relay in which multiple service types, such as voice, video, or data, are conveyed in fixed-length (53-byte) cells
ATM
Link Access Procedure Balanced
LAPB
The data-link layer protocol in the X.25 protocol stack
LAPB
The ISDN data-link layer protocol for the D channel.
LAPD
The data-link layer protocol used by Frame Relay as defined in ITU-T Recommendation Q9.222 and ANSI T1.618
LAPF