Frame Relay 2 — Test 1

Correct Answer: B. B. Wans
Explanation: Frame relay is a standardized wide area network technology and is popularly used because it is cheaper than leased line WANs. It is also very simple to configure user equipment in a Frame Relay network.

Correct Answer: D. D. Voice over frame relay
Explanation: Frame Relay networks offer an option called Voice over Frame Relay, which transmits voice and voice-band data over a Frame Relay network. It has two sub-protocols FRF11 and FRF12.

Correct Answer: C. C. Nine
Explanation: Frame relay is a wide area network technology used to transmit information over a network in the form of frames using relays. The frames are of variable size. It is cheaper than other WANs and it’s simple to configure user equipment in the network.

Correct Answer: C. C. Upper level protocol
Explanation: Frame relay only provides error detection using CRC. If errors are detected, the upper-layer protocols, such as TCP are expected to provide error correction features. Network layer provides flow control.

Correct Answer: D. D. Sonet
Explanation: Frame Relays uses carriers such as SONET (for fiber-optic connections) to physically transmit data frames over a Frame Relay network. SONET is cheaper and provides better network reliability than other carriers.

Correct Answer: B. B. Data link layer
Explanation: Frame relay provides error detection using CRC in the data link layer. The transport layer then provides the error correction features if an error is detected.

Correct Answer: A. A. Data link connection identifier
Explanation: The Data Link Connection Identifier is 10-bit virtual circuit identifier. It is used to assign frames to the specified Permanent Virtual Circuits or Switched Virtual Circuits.

Correct Answer: C. C. Physical layer and data link layer
Explanation: The physical layer is guided by the protocols recognized by the ANSI and provides conversion to frames. The data link layer supports the simplified core functions specified by the OSI model like error detection.

Correct Answer: A. A. To increase the range of data link connection identifiers
Explanation: Extended address is indicated by the last bit of every address byte in the DLCI. It specifies whether the byte is the last in the addressing field. It is used to increase the range of data link connection identifiers.

Correct Answer: A. A. Frad assembles and disassembles the frames coming from other protocols
Explanation: FRAD stands for Frame Relay Assembler/Disassembler. It converts packets into frames that can be transmitted over Frame Relay Networks. It operates at the physical layer.