New CCNA – Frame Relay 2
Note: If you are not sure about Frame Relay, please read our Frame Relay Tutorial.
Question 1
What are two characteristics of Frame Relay point-to-point subinterfaces? (Choose two)
A. They create split-horizon issues.
B. They require a unique subnet within a routing domain.
C. They emulate leased lines.
D. They are ideal for full-mesh topologies.
E. They require the use of NBMA options when using OSPF.
Answer: B C
Question 2
In the Frame Relay network, which IP addresses whould be assigned to the interfaces with point-to-point PVCs?
A. DLCI 16 192.168.10.1/24
DLCI 17 192.168.10.1/24
DLCI 99 192.168.10.2/24
DLCI 28 192.168.10.3/24
B. DLCI 16 192.168.10.1 /24
DLCI 17 192.168.11.1/24
DLCI 99 192.168.12.1/24
DLCI 28 192.168.13.1/24
C. DLCI 16 192.168.10.1/24
DLCI 17 192.168.11.1/24
DLCI 99 192.168.10.2/24
DLCI 28 192.168.11.2/24
D. DLCI 16 192.168.10.1/24
DLCI 17 192.168.10.2/24
DLCI 99 192.168.10.3/24
DLCI 28 192.168.10.4/24
Answer: C
Question 3
What two statistics appear in show frame-relay map output? (Choose two)
A. The number of FECN packets that are received by the router
B. The number of BECN packets that are received by the router
C. The ip address of the local router
D. The value of the local DLCI
E. The status of the PVC that is configured on the router
Answer: D E
Explanation
An example of the output of this command is shown below:
From the output we can see the local DLCI (102 & 103) and the status of the PVC configured on the router (both are defined, active).
Question 4
It has become necessary to configure an existing serial interface to accept a second Frame Relay virtual circuit. Which of the following are required to solve this? (Choose three)
A. configure static frame relay map entries for each subinterface network.
B. remove the ip address from the physical interface
C. create the virtual interfaces with the interface command
D. configure each subinterface with its own IP address
E. disable split horizon to prevent routing loops between the subinterface networks
F. encapsulate the physical interface with multipoint PPP
Answer: B C D
Explanation
To configure subinterface for Frame Relay, first we have to remove the IP address from the physical interface and choose a Frame Relay encapsulation.
Question 5
Which encapsulation type is a Frame Relay encapsulation type that is supported by Cisco routers?
A. Q933-A Annex A
B. IETF
C. ANSI Annex D
D. HDLC
Answer: B
Explanation
Cisco supports two Frame Relay encapsulation types: the Cisco encapsulation and the IETF Frame Relay encapsulation, which is in conformance with RFC 1490 and RFC 2427. The former is often used to connect two Cisco routers while the latter is used to connect a Cisco router to a non-Cisco router. You can test with your Cisco router when typing the command Router(config-if)#encapsulation frame-relay ? on a WAN link. Below is the output of this command (notice Cisco is the default encapsulation so it is not listed here, just press Enter to use it).
Note: Three LMI options are supported by Cisco routers are ansi, Cisco, and Q933a. They represent the ANSI Annex D, Cisco, and ITU Q933-A (Annex A) LMI types, respectively.
HDLC is a WAN protocol same as Frame-Relay and PPP so it is not a Frame Relay encapsulation type.
Question 6
What is the result of issuing the frame-relay map ip 192.168.1.2 202 broadcast command?
A. defines the destination IP address that is used in all broadcast packets on DLCI 202
B. defines the source IP address that is used in all broadcast packets on DLCI 202
C. defines the DLCI on which packets from the 192.168.1.2 IP address are received
D. defines the DLCI that is used for all packets that are sent to the 192.168.1.2 IP address
Answer: D
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some .jpg picture does not load on my computer !
is number 2 true ?
@moataz
I’m with you. The book I’m reading (and answer B on Question 1) says a point-to-point link should have a unique subnet. So, if it’s on a single router, then I’d think B is the answer.
Looking at answer C, if the first two are on R1 and the last two are on R2, then it would be correct, because the would be point-to-point links on the same subnet.
CAn someone explain Q2
Q2.It has a picture in the question
DLCI16 DLCI17
O
|
/ \
DLCI99 O O DLCI28
please clarify question 2.
Question #2 is missing a picture. Please upload. Thank you.
@Bundit, @CCNA: Thanks for your detection. We updated the picture of Q.2.
CAB SOMEONE EXPLAIN QUESTION 2
@Yogi, Man jay & Mike
Question 2 is basically a subnetting question. In a point-to-point frame-relay network, the R1-R2 link must be in one subnet and R2-R3 link must be in one subnet. Answer A has two DLCIs pointing to 192.168.10.1, which makes no sense as R2 will not know what DLCI to choose. Answer B has every interface in a different subnet. Answer D is a multi-point config with every interface in the same Class C network. Answer C is correct by default. DLCIs 16 & 99 are on the 192.168.10.0 network. DLCIs 16 & 99 are on the 192.168.10.0 network. DLCIs 17 & 28 are on the 192.168.11.0 network.
Question #3 is missing a picture.
Please upload.
Thank you.
@Tiago: Thanks for your detection, we updated it!
I PASSED yesterday, thanks to 9tut…..got a 920……woooohhoooo, study up!!!!
Can someone explain the answer to question 2
Regarding the Q2 – every Frame Relay link must be on a unique subnet. There are two point to point links, thus two unique subnets are required. The provided answer is correct.
question 2 the answer D
Mohsen, Q2 is C as point to point is generally /30 mask ie 2 valid IP addresses.
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Lab. Eigrp, ACL 1 and 2.
Focus in this site and try to understand every question and surely every one will passed.
and for future interview. its worthless to memorised those question without the understanding..
Hello
Q3. What two “statistics” appear in show frame-relay map output?
D. The value of the local DLCI <————- is this a Statistics ?
E. The status of the PVC that is configured on the router < – is it possible to configure status of PVC ? which command can be asked to configure the status of PVC from Active to Inactive and vice versa. ? Is the status of PVC a statistics ?
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RE Question 2 An explanation that may help some…
DLCI’s are used to create high speed Layer 2 mappings for ISP switch’s to make routing look-ups fast and efficient,(although we really don’t care what the ISP does with them or how they route them as long as they arrive at the other end timely), the PVC’s are 1) virtual addresses and can be whatever you want however, they do have to be on the same network and 2) the key to understanding them is in decoding the mapping statement. In this question for example when configuring a locally significant Map from R1 to R2, they have decided on a (very nice and simple class C ) 192.168.10.x/24 network, … now for ease of trouble shooting purposes, and because we are creating a map from R1 to R2 when we configure R1 we use 192.168.10.2/24 (because we are mapping to R2) and likewise when we configure the R2 DLCI to R1 we use 192.168.10.1/24(because we a mapping to R1) IE:a map (on the same network) from R1 to R2 and vise versus, this way when the day arrives and you have to troubleshoot some DLCI connections it will be much easier if you create an easy to understand map….. Hope that helps if you struggling with these.. :)
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Q5 today
Q2, Today, 1/12/14
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Q4 On 15th Feb.
q2
WHAT IS THE SYNTAX TO RIGHT A FRAME-RELAY.
IS IT LIKE = TYPE LOCAL ROUTER DLCI – REMOTE ROUTER IP
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