ICND2 Chapter 15 Flashcards

Chapter 15: Frame Relay Concepts

1
Q

Frame Relay Virtual circuit (VC)

A

A logical concept that represents the path that frames travel between DTEs. VCs are particularly useful when you compare Frame Relay to leased physical circuits.

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2
Q

Frame Relay Permanent virtual circuit (PVC)

A

A predefined VC. A PVC can be equated to a leased line in concept.

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3
Q

Frame Relay Switched virtual circuit (SVC)

A

A VC that is set up dynamically when needed. An SVC can be equated to a dial connection in concept.

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4
Q

Frame Relay Data terminal equipment (DTE)

A

DTEs are connected to a Frame Relay service from a telecommunications company. They typically reside at sites used by the company buying the Frame Relay service.

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5
Q

Frame Relay Data communications equipment (DCE)

A

Frame Relay switches are DCE devices. DCEs are also known as data circuit-terminating equipment. DCEs are typically in the service provider’s network.

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6
Q

Frame Relay Access link

A

The leased line between the DTE and DCE.

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7
Q

Frame Relay Access rate (AR)

A

The speed at which the access link is clocked. This choice affects the connection’s price.

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8
Q

Frame Relay Committed Information Rate (CIR)

A

The speed at which bits can be sent over a VC; according to the business contract between the customer and provider.

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9
Q

Frame Relay Data-link connection identifier (DLCI)

A

A Frame Relay address used in Frame Relay headers to identify the VC.

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10
Q

Frame Relay Nonbroadcast Multiaccess (NBMA)

A

A network in which broadcasts are not supported ; but more than two devices can be connected.

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11
Q

Frame Relay Local Management Interface (LMI)

A

The protocol used between a DCE and DTE to manage the connection. Signaling messages for SVCs; PVC status messages and keepalives are all LMI messages.

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12
Q

Frame Relay LMI type: Cisco

A

Document: Proprietary; Parameter: cisco

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13
Q

Frame Relay LMI type: ANSI

A

Document: T1.617 Annex D; Parameter: ansi

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14
Q

Frame Relay LMI type: ITU

A

Document: Q.933 Annex A; Parameter: q933a

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