18.Virtual-Circuit Networks: Frame Relay and ATM

To handle frames arriving from other protocols, Frame Relay uses a device called a _________.

• MUX
• VOFR
• FRAD
• none of the above

In Frame Relay, an address can be ________ bytes.

• 2 to 3
• 2 to 4
• only f2
• none of the above

In ATM, the _____ layer defines the transmission medium, bit transmission, encoding, and electrical-to-optical transformation.

• AAL
• physical
• ATM layer
• none of the above

A _______ ATM LAN combines features of a pure ATM LAN and a legacy ATM LAN.

• legacy
• pure
• mixed architecture
• none of the above

A(n) ______ is the interface between a user and an ATM switch.

• NNN
• UNI
• NNI
• None of the above

In ATM, a virtual connection is defined by _________.

• DLCI
• VPI
• VCI
• a combination of (b) and (c)

In ATM, _______is for short packets.

• AAL5
• AAL3/4
• AAL2
• AAL1

In Frame Relay, when a _____ is selected, the corresponding table entry is recorded for all switches by the administrator.

• SVC
• PVC
• either (a) or (b)
• neither (a) nor (b)

In ATM, the _______layer accepts transmissions from upper-layer services and maps them into ATM cells.

• AAL
• physical
• ATM
• none of the above

The VPI of a UNI is _______ bits in length.

• 32
• 16
• 12
• 8