1. Which three actions might a Frame Relay switch perform
when it detects an excessive build-up of frames in its queue? (Choose three.)
Drops frames from the queue that have the DE bit set
Sets the FECN bit on all frames it receives on the congested
link
Sets the BECN bit on all frames it places on the congested
link
2. Which best describes the benefit of using Frame Relay as
opposed to a leased line or ISDN service?
Customers only pay for the local loop and the bandwidth they
purchase from the network provider.
3. Refer to the exhibit. Router R1 has been configured for
Frame Relay connectivity to routers R2 and R3. What configuration option should
be configured on the R2 and R3 serial interfaces in order for all routers to
ping each other successfully?
R2(config-if)# frame-relay map ip 10.1.1.1 201 broadcast
R2(config-if)# frame-relay map ip 10.1.1.3 201 broadcast
R3(config-if)# frame-relay map ip 10.1.1.1 301 broadcast
R3(config-if)# frame-relay map ip 10.1.1.2 301 broadcast
4. Which two items allow the router to map data link layer
addresses to network layer addresses in a Frame Relay network? (Choose two.)
Inverse ARP
LMI status messages
5. Refer to the exhibit. Which two outcomes occur from the
configuration shown? (Choose two.)
The router will use DLCI 22 to forward data to 10.1.1.1.
Frames sent by 10.1.1.1 arriving on interface serial 0/0/0
of RT_1 will have a data link layer address of 22.
6. Refer to the exhibit. What can be determined about the
Frame Relay switch from the output shown?
It is experiencing congestion.
7. Refer to the exhibit. What can be determined from the
output?
Serial 0/0/0 has the feature frame-relay inverse-arp
enabled.
8. Refer to the exhibit. What effect does the point-to-point
configuration on subinterface S0/0.110 have on the operation of the router?
It eliminates split horizon issues without increasing the
likelihood of routing loops.
9. Refer to the exhibit. Which statement explains why the
Frame Relay connection between R1 and R2 is failing?
The frame-relay map commands are using incorrect DLCIs.
10. What best describes the use of a data-link connection
identifier (DLCI)?
Locally significant address used to identify a virtual
circuit
11. Refer to the exhibit. Router R1 has been configured for
Frame Relay connectivity to routers R2 and R3. Which set of configuration
options for routers R2 and R3 would provide each router connectivity to R1?
R2(config)# interface serial0/0/1.201 point-to-point
R2(config-if)# frame-relay interface-dlci 201
R3(config)# interface serial0/0/1.301 point-to-point
R3(config-if)# frame-relay interface-dlci 301
12. Refer to the exhibit. Frame Relay connectivity has been
configured in the network and OSPF is used as the routing protocol. Router R1
can successfully ping the router R2 serial interface. When R1 attempts to ping
network 192.168.3.0/24 the ping fails. What additional configuration should be
applied on all routers to remedy the problem?
Add the broadcast keyword in the Frame Relay map command on
both routers.
13. Which statement about Frame Relay subinterfaces is
correct?
Point-to-point subinterfaces act like leased lines and
eliminate split-horizon routing issues.
14. Refer to the exhibit. What can be determined about the
configuration of router R1 from the exhibited output?
The LMI type for the Serial 0/0/0 interface has been left to
its default configuration.
15. What is created between two DTEs in a Frame Relay
network?
Virtual circuit
16. Which Frame Relay topology is a compromise of costs, reliability,
and complexity when the WAN contains one headquarters site, 40 regional sites,
and several sites within each regional site?
Partial mesh
17. Refer to the exhibit. A ping is sent to address
192.168.50.10 from the Peanut router. Which DLCI will be used to send the ping?
110
18. What two methods does Frame Relay technology use to
process frames that contain errors? (Choose two.)
Frame Relay services depend on the upper layer protocols to
handle error recovery.
The receiving device drops any frames that contain errors
without notifying the sender.
19. Refer to the exhibit. Which two statements are true
given the output shown? (Choose two.)
The local DLCI number is 401.
Inverse ARP is being used on this connection.
20. Refer to the exhibit. What can be known about the
configuration of router R1 from the output?
The command encapsulation frame-relay ietf has been used on
the Serial 0/0/0 interface.
21. What consideration must be taken into account if RIP is
used on Frame Relay multiaccess networks?
To forward routing updates, address-to-DLCI mapping must be
done via the use of the frame-relay map command coupled with the broadcast
keyword.
22. Refer to the exhibit. You are a network administrator
who has been tasked with completing the Frame Relay topology that interconnects
two remote sites. Router HQ belongs to both the 172.16.1.0/24 and 172.16.2.0/24
subnets with IP addresses of 172.16.1.3 and 172.16.2.3 respectively. Traffic
between R1 and R2 must travel through HQ first. How should the serial interface
on HQ be configured to complete the topology?
Two point-to-point subinterfaces
CCNA 4 Chapter 3 Answers |
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