ICND2 – Frame Relay
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Premium Member: You can test your knowledge with these questions first via this link.
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If you are not sure about Frame Relay, please read my Frame Relay tutorial.
Question 1
[am4show have=’p2;’]What can be done to Frame Relay to resolve split-horizon issues?(Choose two)
A. Disable Inverse ARP.
B. Create a full-mesh topology.
C. Develop multipoint subinterfaces.
D. Configure point-to-point subinterfaces.
E. Remove the broadcast keyword from the frame-relay map command.
Answer: B D[/am4show]
Explanation
SPLIT HORIZON: A router never sends information about a route back in same direction which is original information came, routers keep track of where the information about a route came from. Means when router A sends update to router B about any failure network, router B does not send any update for same network to router A in same direction.
Therefore in order to resolve split-horizon issue, we can create a full-mesh topology (a network topology in which there is a direct link between all pairs of nodes) so that all the routers can learn all the routes advertised by the neighbors -> B is correct.
Configuring Point-to-point subinterfaces is a good way to resolve the split-horizon issue because each subinterface is treated as a separate interface so an interface can send and receive information about a route -> D is correct.
Question 2
[am4show have=’p2;’]Which encapsulation type is a Frame Relay encapsulation type that is supported by Cisco routers?
A. IETF
B. ANSI Annex D
C. Q9333-A Annex A
D. HDLC
Answer: A[/am4show]
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 3
[am4show have=’p2;’]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[/am4show]
Question 4
[am4show have=’p2;’]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[/am4show]
Explanation
This command is described in detail at http://www.9tut.com/frame-relay-tutorial/2. If you don’t get this question please read it.
Question 5
[am4show have=’p2;’]What does the frame-relay interface-dlci command configure?
A. local DLCI on the subinterface
B. remote DLCI on the main interface
C. remote DLCI on the subinterface
D. local DLCI on the main interface
Answer: A[/am4show]
Explanation
When configuring on a point-to-point subinterface, the command frame-relay interface-dlci associates the selected point-to-point subinterface with a DLCI. But remember that the DLCI number in this command is the local DLCI. An example of using this command is shown below:
| R1(config)#interface Serial0/0.1 point-to-point R1(config-subif)#ip address 192.168.1.1 255.255.255.252 R1(config-subif)#frame-relay interface-dlci 1 R1(config-fr-dlci)#exit |
Question 6
[am4show have=’p2;’]What command is used to verify the DLCI destination address in a Frame Relay static configuration?
A. show frame-relay pvc
B. show frame-relay lmi
C. show frame-relay map
D. show frame relay end-to-end
Answer: C[/am4show]
Explanation
An example of the output of “show frame-relay map” command is shown below:
We can see the IP address 172.16.3.1 is associated with the DLCI 100.
Question 7
[am4show have=’p2;’]What occurs on a Frame Relay network when the CIR is exceeded?
A. All TCP traffic is marked discard eligible.
B. All UDP traffic is marked discard eligible and a BECN is sent.
C. All TCP traffic is marked discard eligible and a BECN is sent.
D. All traffic exceeding the CIR is marked discard eligible.
Answer: D[/am4show]
Explanation
Committed information rate (CIR): The minimum guaranteed data transfer rate agreed to by the Frame Relay switch. Frames that are sent in excess of the CIR are marked as discard eligible (DE) which means they can be dropped if the congestion occurs within the Frame Relay network.
Note: In the Frame Relay frame format, there is a bit called Discard eligible (DE) bit that is used to identify frames that are first to be dropped when the CIR is exceeded.
Question 8
[am4show have=’p2;’]What is the purpose of Inverse ARP?
A. to map a known IP address to a MAC address
B. to map a known DLCI to a MAC address
C. to map a known MAC address to an IP address
D. to map a known DLCI to an IP address
E. to map a known IP address to a SPID
F. to map a known SPID to a MAC address
Answer: D[/am4show]
Question 9
[am4show have=’p2;’]What is the advantage of using a multipoint interface instead of point-to-point subinterfaces when configuring a Frame Relay hub in a hub-and-spoke topology?
A. It avoids split-horizon issues with distance vector routing protocols.
B. IP addresses can be conserved if VLSM is not being used for subnetting.
C. A multipoint interface offers greater security compared to point-to-point subinterface configurations.
D. The multiple IP network addresses required for a multipoint interface provide greater addressing flexibility over point-to-point configurations.
Answer: B[/am4show]
Explanation
A main advantage of configuring Frame Relay multipoint compared to point-to-point subinterfaces is we can assign IP addresses on the same subnets/networks to the interfaces of Frame Relay switch, thus saving the subnets/networks you have.
Question 10
[am4show have=’p2;’]Which command allows you to verify the encapsulation type (CISCO or IETF) for a frame relay link?
A. show frame-relay map
B. show frame-relay lmi
C. show inter serial
D. show frame-relay pvc
Answer: A[/am4show]
Explanation
The “show frame-relay map” command displays the current map entries and information about the connections, including encapsulation type.
You can check Table 33 in the following link: http://www.cisco.com/en/US/docs/ios/12_2/wan/command/reference/wrffr4.html#wp1029343
It clearly states there is a Field which can be Cisco or IETF, which “indicates the encapsulation type for this map”. We quote that Table 33 here for your quick reference (you will see what we want to imply in bold):
| Field | Description |
| Serial 1 (administratively down) | Identifies a Frame Relay interface and its status (up or down). |
| ip 131.108.177.177 | Destination IP address. |
| dlci 177 (0xB1,0x2C10) | DLCI that identifies the logical connection being used to reach this interface. This value is displayed in three ways: its decimal value (177), its hexadecimal value (0xB1), and its value as it would appear on the wire (0x2C10). |
| static | Indicates whether this is a static or dynamic entry. |
| CISCO | Indicates the encapsulation type for this map; either CISCO or IETF. |
| TCP/IP Header Compression (inherited), passive (inherited) | Indicates whether the TCP/IP header compression characteristics were inherited from the interface or were explicitly configured for the IP map. |
The “show frame-relay lmi” gives us information about the LMI encapsulation type used by the Frame Relay interface, which can be ANSI, CISCO or Q933a. Therefore it is not what the question requires (CISCO or IETF).
Question 10 Answer should be A. Your Explanation is correct so just a typo there.
@if_only_i_had_one: Thanks for your detection. We updated it!
1, 4, 5 or 6..were on exam two days ago…
Found this for helping with troubleshooting: Frame-Relay
http://www.youtube.com/watch?v=L37pz4dbS5A
Took ICND2 earlier today, 986 / 1000.
Questions 1, 4, 5, 6, from this page were on there.
1,4,5,6,8 were there
Passed today 1000. Got different configuration of the Eigrp & frame Relay labs where there were different DLCIs and IP addresses, but same process was used to get answers (show commands, show ip protocols, show ip interface brief ).
A question about GLBP and a question about netflow were on my test. You can find them here: http://www.examtut.com/2013/09/new-questions-in-ccna-200-120-hsrp-vrrp.html
Study 9tut and this guy i found him really helpful. He has unique way of teaching http://www.danscourses.com If you can do all his videos again and again. Trust me you will get the concept. Also one thing i learned today is if you don’t know the concept it’ll be hard for you in the exam.
All the best to every one in their path. Keep me in your good wishes.
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I took my ICND2 last week for the first time and failed it with a 786. I’m glad I found this site. I’m afraid to take it again as I don’t want to fail it again 🙁
In Question 3, why not D? can anyone give an explanation?
@izzarazzu
I think it’s just one of those tricky questions in that the question asks for characteristics (specific to the configuration) of the p2p subinterfaces, and not about their implementation. B and C are always true, whereas a full mesh topology does not always require subinterfaces (there might only be one frame relay link needed to run the topology).
Took the exam today. Pass 986/1000. Q1, Q3, Q5, Q6, Q8 were on there.
Thanks 9tut.
Question 3 states that “two characteristics of Frame Relay point-to-point subinterfaces” should be:
B. They require a unique subnet within a routing domain.
C. They emulate leased lines.
but when I took quiz #6, question 12 worded the exact same way said the answers should be:
They emulate leased lines
They are ideal for full mesh topologies
Please clarify.
Tested today, 8/20. #5, 6 were on there.
need help on a question I have seen several times and can’t seem to get it right:
If required, what password should be configured on the DeepSouth router in the branch office to
allow a connection to be established with the MidEast router?
A. No password is required.
B. Enable
C. Secret
D. Telnet
E. Console
the output from the show command show all the interfaces, with respective encapsulations, the router that is being referenced is PPP, and at the bottom or the output is the vty password tinet. the answer is B- ENABLE.
WHY????
guess what, I think I found it but would appreciate some more expounding on the subject: the enable password is what is used as “default” when not specified/
I FOUND IT!!! https://www.9tut.net/icnd2/icnd2-labsim/frame-relay-sim#more-487
command sh run: if ppp: the username and password will be listed at the top of the output; if default=HDLC, no password required: pay attention to the port connection, to find out which router they are asking for in the sh run output. phew, this Q came up on both the ICND 1 AND 2. I know that I got it wrong previously. its been HAUNTING ME!!!
i pass exam ago 2 month but came certificate me i dont known how i do it please help
took the exam today and pass with 907. Question 5, 6 and 9 were on there, the others werent. location United States Florida.
test ICND 2
Thanks 9tut
Took ICND2 today 986/100. 1 4 5 6 7 8 & 9 were on there. Thanks 9TUT
If required, what password should be configured on the DeepSouth router in the branch office to
allow a connection to be established with the MidEast router?
A. No password is required.
B. Enable
C. Secret
D. Telnet
E. Console
the output from the show command show all the interfaces, with respective encapsulations, the router that is being referenced is PPP, and at the bottom or the output is the vty password tinet. the answer is B- ENABLE.
WHY????
went to a friend who has an advanced cisco cert, and with his help analyzing this, the answer seems to be, NO PASSWORD REQUIRED. due to the fact that in the show run output, the interface has ppp listed as the encapsulation however, there is NO COMMAND accompanying that encapsulation such as “authentication ppp pap or ppp chap. therefore, since there is no authentication command, which will then require each router to verify its credentials, no password is required. can or will anyone else confirm this?
i think the answer for question 10 is wrong. the answer should be
C. show inter serial
Regarding Question 10 :
When I prompted the command “show frame-relay map”, I do not see anything showing “encapsulation type” for a frame relay link.
#show frame-relay map
Serial0/0.102 (up): point-to-point dlci, dlci 102(0x66,0x1860), broadcast
status defined, active
Serial0/0.103 (up): point-to-point dlci, dlci 103(0x67,0x1870), broadcast
status defined, active
I think is a kind a tricky question. But if you prompted the command “show interface {interface number} you shoul see the encapsulation type. for instance:
#show interface s0/0
Serial0/0 is up, line protocol is up
Hardware is GT96K Serial
MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation FRAME-RELAY IETF, loopback not set
Keepalive set (10 sec)
LMI enq sent 665, LMI stat recvd 628, LMI upd recvd 0, DTE LMI up
……suppressed ……..
So, I think the option “C.interface serial” is not valid yet because it does not specify the serial number. Likewise, the option “B.show frame-relay lmi is not correct”. Why?, because it provides information about the “LMI” not encapsulation type.
I think the answer should be the command: show interface serial {serial #}, for instance,
“show interface serial 0/0” which is not included in the answers.
to Anonymous December 10th, 2014:
R3#show frame-relay map
Serial0/3/0 (up): ip 192.168.1.2 dlci 302, dynamic,
broadcast,
IETF, status defined, active
Serial0/3/0 (up): ip 192.168.1.1 dlci 301, dynamic,
broadcast,
IETF, status defined, active
R3#
R3#sh int s0/3/0
Serial0/3/0 is up, line protocol is up (connected)
Hardware is HD64570
Internet address is 192.168.1.3/24
MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation Frame Relay, loopback not set, keepalive set (10 sec)
LMI enq sent 13, LMI stat recvd 11, LMI upd recvd 0, DTE LMI up
LMI enq recvd 0, LMI stat sent 0, LMI upd sent 0
LMI DLCI 1023 LMI type is CISCO frame relay DTE
….
A. show frame-relay map —- is correct
I want to note IOS version on my router 15 and exam questions about the 15 version
Q3 and q8 on my exam today
Answer to Q10 is A,
Take a look and compare a dynamic map and static map.
R3#show frame-relay map
Serial0/0 (up): ip 192.168.1.1 dlci 201(0xC9,0x3090), dynamic,
broadcast,, status defined, active
Serial0/0 (up): ip 192.168.1.3 dlci 201(0xC9,0x3090), static,
CISCO, status defined, active
on this output yo can see that the static map is using CISCO encapsulation, the absence of an encapsulation name on the dynamic map indicates that is using the default one, IETF.
“show frame-relay map” is the correct one
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Hi Nic,
Just use bit torrent to find VCE Cert Exam to find the cracked version of the SW. They have the explanations there. You can then d/l the VCE questions for free from http://www.examcollection.com. Place the VCE questions in the program files folder where you installed VCE Cert Exam. Hope that helps.
passed on 3/13. question 6 on it. tks 9tut
Nic, that’s because USD to ZAR ratio is 1:12 (plus provision). In reality it’s the same amount of USD for you and for me. For some reason you’re trying to make it to look like it is 14 times the USD amount.
I got Q5, Q6, Q9 today in the ICND2 exam.
Thanks 9tut.
@SDbeachbum
I agree with you, Q3 answer should be C&D in my opinion, anyone can please clarify ?
Question 3
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
Please someone explain…
This is very help full.any body can pass if the person give time to study
@Gaspro
Point-To-Point subinterfaces are used for partial mesh topologies, which have separate access links between each pair of routers logically. Physically, there is only one link, from the router to the frame relay switch. Since each access link acts as a separate interface, they must have different subnets. Each subinterface is associated to separate access links, and are why they need separate subnets.
Another way to think about this is that a point-to-point link only connects two devices, in the instance of frame relay 2 routers. Physically, each router have one link to their respective frame-relay switches. Logically, there is a link between each router to a central one (remember that this is a partial topology, not full). Each link would require separate subinterfaces, and since the logical links are separate, they would require different subnets.
The frame-relay concept chapter in the icnd2 handbook further explains the differences between the topologies and probably give a far better explanation.
Q2 & Q10 got today.
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Anonymous made some comments regarding Question 10 that should be clarified. The answer to Question 10 is correct, as he stated in his comments. However, all should know that the default encapsulation type for Frame Relay is CISCO, not IETF.
If you do not see an encapsulation type listed in the “show frame-relay map” output, then it is using the default encapsulation type of CISCO. If a connection is using an IETF encapsulation (required when connecting to a non-Cisco device), then it will be specifically listed in the command output (as provided in Serg’s example above). Encapsulation CISCO can also be listed in the command output if it was statically assigned in the interface’s configuration.
Keys to remember for this question:
1. Show Frame-Relay Map will give you the encapsulation type for a Frame Relay connection
2. If no encapsulation is shown, then it is using the default type of CISCO
3. If using IETF, it will be listed in the command output
Take ICND2 today and pass 988. All questions was from 9tut and Nada dump. Thank 9tut and Nada. Please support 9tut website.
Just took the test today – 980/1000 Questions 4 and 6 were from this page. Thanks 9tuts! Also got Frame Relay, EIGRP and OSPF labs- a lot of OSPF & quite a few EIGRP questions!
Question 4… why isn’t the answer “A”? I thought the “broadcast” keyword allowed broadcast traffic (ie. for OSPF and other routing protocols etc) to travel to the destination identified by the DLCI.
http://www.ciscopress.com/articles/article.asp?p=170741&seqNum=4
States: Enter the broadcast keyword to allow the specified DLCI to forward broadcast and multicast packets. This can reduce the complexity of running dynamic routing protocols such as OSPF (which uses multicast updates) over Frame Relay.
Am I interpreting it wrong for this question?
Really not sure now since https://www.9tut.net/category/icnd2-200-101 Question 1 has three answers… one of them being “E. broadcast indicates that a dynamic routing protocol such as RIP v1 can send packets across this PVC”
@all: We had to move all the questions and answers out of 9tut. We can only keep the explanation. You can download the questions and answers at: https://mega.co.nz/#!oIdESYbD!yyu33vygrfKPy4rcmcbV6qW2fxINNoTokuDM3CjA_og
920/1000.. that’s my score earlier today. if there’s only one material you need to prepare, it’s 9tut.. many thanks to the owners of this site.
@GCert the question is tricky–it sez broadcast packets. D is correct
How does n=one review the questions
how does one retrief the questions
Guys, does any one know where I can find a collection of all explanations in one file?
Guys, does any one know where I can find a collection of all explanations in one file?
Yes buy a book or just read through all which 9tut provides and make your own notes into one file.
There are some interesting closing dates on this article however bkkddakeaagfgdee