Quản trị mạng Chapter6

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Exam questions


1 . Which two statements about Frame Relay subinterface configurations are true?
Any IP address must be removed from the physical interface.
A subinterface is configured either multipoint or point-to-point.
The physical interface and subinterface can each be configured with IP addresses.
The configuration must be added to the D channel.

2 . What are two results of issuing the following command: frame-relay map ip 192.168.1.2 100
Inverse ARP is enabled.
Inverse ARP is disabled.
Split horizon is enabled
Split horizon is disabled.
IP address 192.168.1.2 is dynamically mapped to DLCI 100.
IP address 192.168.1.2 is statically mapped to DLCI 100.

3 . Frame Relay mapping works by telling a router that to get to a certain device, it must use a certain DLCI. What is the
mapping default on a Cisco router?
Manual configuration of mappings
Inverse ARP
RARP
ARP

4 . What is true regarding Frame Relay subinterfaces?
The IP addresses of the subinterfaces must match

The IP addresses of the subinterfaces must be the same as the physical interface
The subinterfaces don’t need IP addresses because they take the address of the physical interface
You must take the IP address off of the physical interface


5 . A Frame Relay PVC is reported as in INACTIVE state on the router. What is the possible cause?
PVC is not configured on local router.
PVC is not configured on the Frame Relay switch.
PVC is in DOWN state on the remote router.
PVC is in DELETED state on the remote router.

6 . Which of the following are true? Choose three.
The DLCI is a local identifier between the router and the telco switch
Routers connected on opposite sides of the cloud must use different DLCI’s
Routers connected on opposite sides of the cloud can use the same DLCI’s
On your side, you must map the remote interface to your local DLCI
On your side, you must map your interface to your local DLCI

7 . Which two are characteristics of Frame Relay?
Medium cost
High reliability
Circuit-switched
Branch site connectivity

8 . Serial0 on a router is configured with the command “encapsulation frame-relay”. What can cause the output from the
show interface command to indicate: Serial0 is up, line protocol is down?
No carrier signal
IP subnet mismatch
LAPF state, down
LMI type mismatch

No IP address configured

9 . Why would you use Frame Relay subinterfaces?
It’s better to have many interfaces to split up traffic
To avoid reachability issues brought on by split horizon
To take advantage of authentication issues
You would not want to use subinterfaces when using Frame Relay

10 . What are two advantages of dedicated leased lines over FR connections?
lower cost
full guaranteed bandwidth
more control over the connection
better suited for multiple branch locations

11 . Read And Answer the question:

A
B
C
D

12 . Which command will change the specified Frame Relay encapsulation for a specific PVC on an interface?
no frame-relay encapsulation ietf
no frame-relay encapsulation cisco
encapsulation frame-relay ietf
frame-relay map ip 10.160.2.1 100 broadcast ietf

13 . When a router throttles network traffic based on congestion notification in a Frame Relay network, where does the
router get the information from?
BECN packets

FECN packets
Datalink layer
Frame Relay statistics
TTL statistics

14 . What are the three possible states of a Frame Relay permanent virtual circuit (PVC)?
Init
Active
Down
Inactive
Deleted
Operational

15 . What command would you use to show Frame Relay connections, traffic, and statistics?
show frame-relay pvc
show frame-relay statistics
show frame-relay traffic
show frame-relay connections

16 . Which three statements about Frame Relay are true?
It is available to run on SVC
It is a Layer 2-based technology
It is a reliable transport technology
It is available in all countries of the world
It is a connection-oriented datalink technology

17 . Read and Answer question:

A
B

C
D

18 . Refer to the following. What is the possible problem?

Frame Relay encapsulation mismatch.
Frame Relay LMI type mismatch.
Missing routing table entry.
Missing inverse ARP entry.
Missing MAC address

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