Wan Frame Relay Ch3

Front 1

What is the most wildly used WAN technology in the word?

Back 1

Frame Relay

Front 2

What is Frame Relay

Back 2

High-Performance WN protocol that operates at the Physical and data link layers of the OSI reference model

Front 3

How does Frame Realy reduce network cost?

Back 3

Uses less equioment
Less Complexity
easier to implement.
Provides greater bandwidth, reliability and resiliency than private lines or leased lines.

Front 4

With leased lines what is the minimum that increments are leased/purchased in kbps?

Back 4

64 kbps

Front 5

What are major reasons Frame Relay is more cost-effective than leased lines?

Back 5

Only pay for the bandwidth you need and local loop.
Distance between nodes does not matter as far as cost goes.

Front 6

Frame Relay provides inrements in service as low as ________ kbps?

Back 6

4kbps

Front 7

What dose DLCI stand for?

Back 7

Data Link Connection Identifier.

Front 8

What does the DLCI (Data Link Connection Identifier) do in frame relay, how is it defined/crated?

Back 8

It identifies each connection in frame relay, used like a MAC (media access control) address.
It is defined/created by the network admin, it can be any number they want to use starting at 16 and up.

Front 9

Does frame relay have error detection?

Back 9

No

Front 10

What are the 2 componets (OSI layers) that DCE and DTE consist of?

Back 10

Physical layer and Data Link Layer

Front 11

What does FRAD stand for what is is also know as?

Back 11

Frame Relay access Device
Also known as Frame Relay Assembler/Dissembler.

Front 12

What is a FRAD (Frame Relay access Device)

Back 12

A dedicated appliance or router configured to support Frame Relay. Located at customer premises and connects to switch port on service provider.

Front 13

What does VC stand for when talking about Frame Relay

Back 13

Virtual Circuits

Front 14

What are the 2 types of VCs (Virtual Circuits)

Back 14

Permanent Virtual Circuits and Switched Virtual Circuits

Front 15

What does PVC stand for when talking about Frame Relay

Back 15

Permanent Virtual Circuits

Front 16

What does SVC stand for when talking about Frame Relay

Back 16

Switched Virtual Circuits

Front 17

What are the differances between PVC and SVC.

Back 17

SVC is used for connections requiring only sporadic transfer between DTE across frame relay. PVC is used for frequent and consistent data transfer between DTE across Frame Relay network.

Front 18

What are to operational states of SVC?

Back 18

Call Setup
Data Transfer
Idle
Call Termination

Front 19

What are to operational states of PVC?

Back 19

Data Transfer
Idle

Front 20

Frame Relay uses ARP, what does ARP stand when Frame Relay is involved?

Back 20

Inverse Address Resolution Protocol.

Front 21

What does ARP do?

Back 21

Allows as access server to discover the network address of a device associated with a virtual circuit.
Trans lates Layer 2 address to layer 3 address.

Front 22

What 2 ways is DLSI mapping be accomplished?

Back 22

Static or Dynamic Mapping

Front 23

Briefly describe Dynamic mapping.

Back 23

Uses ARP (Inverse Address Resolution Protocol) to resolve next-hop network protocol address to a local DLCI value and creates an Address-to-DLCI mapping table.

Front 24

Briefly describe Static mapping.

Back 24

Manually entered mapping for next-hop protocol address to a local DLCI.

Front 25

Can you use ARP (Inverse Address Resolution Protocol) and a static map for the same DLCI and protocol?

Back 25

No

Front 26

When setting up Frame Relay on a non-Cisco router what parameter of the command must you include?

Back 26

ietf

Front 27

What does LMI stand for?

Back 27

Local Managment Interface

Front 28

Briefly describe LMI(Local Managment Interface).

Back 28

Provides Frame Relay status information between DTE and DCE every 10 seconds (varies).
If the network does not respond with the requested information the User device may consider the connection down
When the network responds with a Full Status report it includes information about DLCIs allocated line, this can be used to determine whether the logical connections can pass data

Front 29

When you manually configure the LMI type what must you also manually configure on Frame Relay interfaces to prevent status exchange message from timing out?

Back 29

Keepalive interval

Front 30

A large mismatch in the Keepalive interval on the router and switch may cause the Switch to what?

Back 30

Think the router is dead (non-functional, not working correctly)

Front 31

When using Static mapping with Frame Relay what does the Broadcast option allow?

Back 31

Allows broadcast and multicast over VCs(Virtual Circuits) And permits the use of dynamic routing protocols over VC.

Front 32

What does NBMA networks stand for?

Back 32

NonBroadcast Multiaccess networks.

Front 33

What is a subinterface when referencing Frame Relay?

Back 33

A subinterface is a logical interface that is directly associated with a physical interface. One physical interface can have multible subinterfaces.

Front 34

What 2 modes can subinterfaces be configured in?

Back 34

Point-to-Point and Multipoint

Front 35

Briefly Explain Point-to-point Subinterface for Frame Relay.

Back 35

Point-to-point Subinterface for Frame Relay establishes one PVC connection to another physical interface or subinterface on a remote router.

Front 36

Briefly Explain Multipoint Subinterface for Frame Relay.

Back 36

Multipoint Subinterface for Frame Relay establishes multiple PVC connection to another physical interface or subinterface on remote routers.

Front 37

What is Split-horizon?

Back 37

Split horizon is a method of preventing a routing loop in a network.
Packets and routing updates are never send back on the same path it was received.

Front 38

Which Subinterface type still implies Split-horizon, Point-to-Point or Multipoint

Back 38

Multipoint

Front 39

Which Subinterface type Requires each subinterface to have it's own subnet?

Back 39

Point-to-Point

Front 40

Which Subinterface type Requires the same subnet?

Back 40

Multipoint

Front 41

What does CIR stand for?

Back 41

Commited Information Rate.

Front 42

What is CIR (Commited Information Rate)?

Back 42

Amount of data that the network receives from the access circuit.
The service provider guaratees that the customer can send data at the CIR (Commited Information Rate).

Front 43

Aside from any CPE cost, what Three cost componets the customer pays for?

Back 43

Access or port speed
PVC (Permanent Virtual Circuits)
CIR (Commited Information Rate)

Front 44

When refering to Frame Relay cost what is the customer paying for what purchasing Access or port speed?

Back 44

This is the leased line from DTE to the DCE (Customer to Service Provider) cost very on the speed and type of the leased line.

Front 45

When refering to Frame Relay cost what is the customer paying for what purchasing PVC(Permanent Virtual Circuits)

Back 45

This is the number of PVCs your company needs. The cost wll increase as the number of PVCs increase you need.

Front 46

When refering to Frame Relay cost what is the customer paying for what purchasing CIR (Commited Information Rate)

Back 46

The cusoter is paying for the speed of the CIR acorss the Frame Relay network.

Front 47

As relating to Frame Relay what is Bursting?

Back 47

Bursting allows devices that temporarily need addtional bandwidth to borrow it at noe extra cost from other devices that aren't using it. This combind bandwidth can not exceed the Access or Port Speed.

Front 48

What does CBIR and BE stand for.
What do they indicate/represent?

Back 48

Committed Burst information Rate (CBIR)
Excess Burst Size (BE)
CBIR is the amount of bandwidth that can be barrowed in bursting from your own PVCs up to the max bandwith of there combination.
BE is the bandwidth from more than your CBIR to the max of the bandwidth of the Access or Port speed.

Front 49

What does DE stand for?

Back 49

Discard Eligible

Front 50

What does DE mean?

Back 50

It is a marking in the header, indicating that this packet maybe dropped if congestion occurs or the network does not have enough capacity. This happens when frames are submitted for CBIR (Committed Burst information Rate known also as Bursting)

Front 51

What does BECN stand for and give a very brief description?

Back 51

Backwards Explicit Congestion Notification
Warns upstream devices about a Queue build up on a Frame relay switch, even if they did not contribute to the congestion.

Front 52

What does BECN stand for and give a very brief description?

Back 52

Forward Explicit Congestion Notification
Warns downstream devices about a Queue build up on a Frame relay switch