CCNA – WAN
Here you will find answers to WAN Questions
If you are not sure about Frame Relay, please read my Frame Relay tutorial.
Question 1
The command frame-relay map ip 10.121.16.8 102 broadcast was entered on the router. Which of the following statements is true concerning this command?
A: This command should be executed from the global configuration mode.
B: The IP address 10.121.16.8 is the local router port used to forward data.
C: 102 is the remote DLCI that will receive the information.
D: This command is required for all Frame Relay configurations.
E: The broadcast option allows packets, such as RIP updates, to be forwarded across the PVC.
Correct Answers: E
Explanation:
The command frame-relay map ip 10.121.16.8 102 broadcast means to mapping the distal IP 10.121.16.8 102 to the local DLCI 102. When the “broadcast” keyword is included, it turns Frame Relay network as a broadcast network, which can forward broadcasts
Question 2
Refer to the exhibit. Which statement describes DLCI 17?
A: DLCI 17 describes the ISDN circuit between R2 and R3.
B: DLCI 17 describes a PVC on R2. It cannot be used on R3 or R1.
C: DLCI 17 is the Layer 2 address used by R2 to describe a PVC to R3.
D: DLCI 17 describes the dial-up circuit from R2 and R3 to the service provider.
Correct Answers: C
Explanation:
DLCI stands for Data Link Connection Identifier. DLCI values are used on Frame Relay interfaces to distinguish between different virtual circuits. DLCIs have local significance because the identifier references the point between the local router and the local Frame Relay switch to which the DLCI is connected.
Question 3
A default Frame Relay WAN is classified as what type of physical network?
A: point-to-point
B: broadcast multi-access
C: nonbroadcast multi-access
D: nonbroadcast multipoint
E: broadcast point-to-multipoint
Correct Answer: C
Explanation:
Non-Broadcast Multi-Access (NBMA) networks are types such as Frame Relay, X.25, and Asynchronous Transfer Mode (ATM). These networks allow for multi-access, but have no broadcast ability like Ethernet
Question 4
Which of the following are key characteristics of PPP? (Choose three.)
A: can be used over analog circuits
B: maps Layer 2 to Layer 3 address
C: encapsulates several routed protocols
D: supports IP only
E: provides error correction
Correct Answers: A C E
Explanation
Below is some more information about PPP:
PPP (Point-to-Point Protocol) allows authentication such as Password Authentication Protocol (PAP) and Challenge Handshake Authentication Protocol (CHAP) and multilink connections (allow several separate physical paths to appear to be one logical path at layer 3) and can be run over asynchronous and synchronous links.
PPP can work with numerous network layer protocols, including Internet Protocol (IP), Novell’s Internetwork Packet Exchange (IPX), NBF and AppleTalk.
PPP only supports error detection, not error correction so answer E should be understood as “provides error detection”. It is a mistake of this question.
Question 5
Which three Layer 2 encapsulation types would be used on a WAN rather than a LAN? (Choose three)
A: HDLC
B: Ethernet
C: Token Ring
D: PPP
E: FDDI
F: Frame Relay
Correct Answer: A D F
Question 6
Refer to the exhibit. What is the meaning of the term dynamic as displayed in the output of the show frame-relay map command shown?
A: The Serial0/0 interface is passing traffic.
B: The DLCI 100 was dynamically allocated by the router
C: The Serial0/0 interface acquired the IP address of 172.16.3.1 from a DHCP server
D: The DLCI 100 will be dynamically changed as required to adapt to changes in the Frame Relay cloud
E: The mapping between DLCI 100 and the end station IP address 172.16.3.1 was learned through Inverse ARP
Correct Answer: E
Explanation
The term dynamic indicates that the DLCI number and the remote router IP address 172.16.3.1 are learned via the Inverse ARP process.
Inverse ARP is a technique by which dynamic mappings are constructed in a network, allowing a device such as a router to locate the logical network address and associate it with a permanent virtual circuit (PVC).
Question 7
Which of the following describes the roles of devices in a WAN? (Choose three.)
A: A CSU/DSU terminates a digital local loop
B: A modem terminates a digital local loop
C: A CSU/DSU terminates an analog local loop
D: A modem terminates an analog local loop
E: A router is commonly considered a DTE device
F: A router is commonly considered a DCE device
Correct Answers: A D E
Explanation
The idea behind a WAN is to be able to connect two DTE networks together through a DCE network. The network’s DCE device (includes CSU/DSU) provides clocking to the DTE-connected interface (the router’s serial interface).
A modem modulates outgoing digital signals from a computer or other digital device to analog signals for a conventional copper twisted pair telephone line and demodulates the incoming analog signal and converts it to a digital signal for the digital device. A CSU/DSU is used between two digital lines -> A & D are correct but B & C are not correct.
For more explanation of answer D, in telephony the local loop (also referred to as a subscriber line) is the physical link or circuit that connects from the demarcation point of the customer premises to the edge of the carrier or telecommunications service provider’s network. Therefore a modem terminates an analog local loop is correct.
Question 8
How should a router that is being used in a Frame Relay network be configured to avoid split horizon issues from preventing routing updates?
A: Configure a separate sub-interface for each PVC with a unique DLCI and subnet assigned to the sub-interface
B: Configure each Frame Relay circuit as a point-to-point line to support multicast and broadcast traffic
C: Configure many sub-interfaces on the same subnet
D: Configure a single sub-interface to establish multiple PVC connections to multiple remote router interfaces
Correct Answer: A
Explanation
Look at the figure below:
In the figure, router R1 has two point-to-point subinterfaces. The s0.1 subinterface connects to router R3 and the s0.2 subinterface connects to router R2. Each subinterface is on a different subnet.
Question 9
What can a network administrator utilize by using PPP Layer 2 encapsulation? (Choose three.)
A: VLAN support
B: compression
C: authentication
D: sliding windows
E: multilink support
F: quality of service
Correct Answers: B C E
Explanation
Same as question 4
Question 10
The Frame Relay network in the diagram is not functioning properly. What is the cause of the problem?
A: The Gallant router has the wrong LMI type configured
B: Inverse ARP is providing the wrong PVC information to the Gallant router
C: The S3 interface of the Steele router has been configured with the frame-relay encapsulation ietf command
D: The frame-relay map statement in the Attalla router for the PVC to Steele is not correct
E: The IP address on the serial interface of the Attalla router is configured incorrectly
Correct Answer: D
Explanation
At Attalla router, we find a deleted status but the next map statement indicates an active status, which if for Gallant. Therefore we can deduce the map statement for the PVC from Attalla to Steele is incorrect. Incorrect DLCI assignments that are configured normally shown up as “deleted” in the frame relay maps.
@jay
isdn is voice+data over telephone line. it is a service set.
wikipedia says: “Integrated Services Digital Network (ISDN) is a set of communications standards for simultaneous digital transmission of voice, video, data, and other network services over the traditional circuits of the public switched telephone network.”
wan is “wide area network”, it defines how far out the packets go (local – LAN, or far away – WAN).
isdn is a set of standards. they dont mix
thank you xallax.
so it is not included in 640-820 exam.
Just for clarification.
Thanks in advance.
hello there
@ENG.Shaymaa: I think the answer is and by (I think) I am sure as 90% of the answer. The reason. the DLCIs are configured to distinguish between different PVCs. Basically, you can’t configure DLCI for remote peers because they are either configured manually or dynamically with Inverse ARP but not manually. What remains is the local answers but over main or sub? DLCIs are configured on sub-interfaces and main interfaces. But as for Frame-Relay, it’s always added on sub-interfaces for many reasons.
Check this screenshot ( http://grab.by/ei4u ) of real implementing of DLCI on sub and main interfaces – check the notes 1 through 4. I hope this is helpful.
@ENG.Shaymaa: As you can see. I find the question and the answer I mentioned is the true one :) check it out http://grab.by/ei7A
I passed my ccna exam today Praise be to God! Thank you Jesus! and thanks to 9TUT for the tutorials and explanations, great site and thanks to xallax for your explanations to questions and thanks to http://www.examcollection.com for the dumps. Pls guys lets donate and help to keep this site up!
48 ques for exams including 3 simulation, I had EIGRP, Acesslist2 and VTP . Make sure you practice the simulation, use packet tracer or gns3. Best wishes to all!
@yoka
am also preparing for ccna kindly email me the dumps at moadelekan@gmail.com
Hey guys,
can somebody explain the regarding the question:
How many interfaces on R1 should be configured as “ip nat inside” to grant external access to the entire network?
http://s1076.photobucket.com/albums/w458/mockgarvotz/?action=view¤t=NAT.jpg
A. 1
B. 4
C. 3
D. 5
the answer from bruce dump is 4. the answer should be 3..
Does PPP provide any mapping at all? I’m a little confused about Q4.
@shawosh.
Technically only 3 interfaces need to be declared as ip nat inside but there should be one cmd like this ip nat inside source list pool my-pool-nat int s/0/0/0 overload ( for example) apply to outgoing interface. So i guess 4 interface. Damn cisco word playing question. Do u think am i right
Everyone
Can you send the the 632 examan on vce on alizar6373@hotmail.fr love you all
Shawosh, came here looking for the same answer, but think I just figured it out. The picture has a typo.
FA0/0
FA0/2 Need inside statements, that’s two.
But FA0/1 is two subinterfaces for the router on a stick for the two vlans under it. Should be FA0/1.1 and FA0/1.2. They are both labeled as FA0/1.1. Anyway, that is two more that need inside statements.. Total of four.
please , i want to understand q10
Muhammad, how did Allah get you a very high score on the CCNA exam? I would assume your preparation and knowledge is 90% of what got you the high score.
Nice explanations , just enough to recall what you have learned
Hi Yasmine,
when you look at DLCI 509 in Attalla Router, you can see that there was mistake in typing the local DLCI number, it should have been 506 from 605 Steele Router. Hope it helps!
@Lenny, yasmine
No its not.
DELETED—The PVC is not present (DTE device only), which means that no status is received from the LMI protocol. Means Frame Relay Switch doesn’t know enything about such a DLCI 506
can somebody explain me this question, please.
A mid-sized company with five branch offices across Canada wants to create a WAN that will provide the most cost effective fully meshed environment with at least 512 kbps throughput. What WAN service would meet
this need?
A. Frame Relay
B. leased lines
C. ISDN BRI
D. ATM
E. PPP
the answer is A but I don’t know why?
Hi everyone;
I took my ccna exam last monday and believe me, it was so different that i expected. A lot of questions about WAN protocols, specially PPP. LAbs were the same in this web, ACL, VTP and Eigrp. My advice pay attention to the concepts, like CHAP, PAP, EIGRP concepts. The exam was very theorical.
By the way i lost my test so if anyone have info updated about 640-802 test please sent to me at leomongec@hotmail.com.
Thanks in advance!!!
I am impressed with this website, rattling I am a fan.
I failed the exam.
CCNA getting tougher, so better to study harder.
Hi demolished Shark,
I feel sorry about you because of failing in the exam, can you please justify why you were fail in the exam. Were there new questions in the exam that are not available here or you didn’t practice the questions properly that are available here, please reply us with a brief answer.
Thanks.
Hi demolished Shark,
Can you explain some more friend? Are the questions hard rather mentioned here?
Hi, i feel that i found you frequented my web site thus i came to return the actual favor.
For question 10, Gallant can talk to attalla but can attalla talk to gallant?
assume it is configured as in the question.
hi, can anyone help me with ACL revision questions in PDF.My exam is next week.thanks in advance.
my email: jmursi@yahoo.com
Question 4, if i’m to chose, i will select A & C cos there is no way i’ll know the option E is an error
@xallax. hi. the one u gave it to me i need to purchase right. yes. do you have the one which is free? or something free
Which command allows you to verify the encapsulation type (CISCO or IETF) for a frame relay link?
A.
show framerelay map
B.
show framerelay lmi
C.
show inter serial
D.
show framerelay pvc
Correct answer: A
refer to:
http://www.aiotestking.com/cisco/2011/08/which-command-allows-you-to-verify-the-encapsulation-type-cisco-or-ietf-for-a-frame-relay-link/#comment-1635
Can somebody explain why correct answer is A?
@9tut
Are the questions on this site “DUMPS”? And if so are they current?
Thanks.
@9tut
Do you have to be a “Premium Member” to get access to the current “DUMPS”. If so does fair. The forum here is a wonderful piece of site. I have never been more comfortable studying for my CCNA. And I have been doing it for months. Failed one already.
Advise.
@Eugene: Premium Member allows you to interact with the questions on this site. In fact, most of the questions in the exam were posted here like the real exam.
@9tut
I have successfully registered now. I have a question though. I realize that some of the posts to some questions date back 2011. My question is, are the “questions” on the site subject to updates at all or are the same since 2011.
@Eugene: We added new questions at the end of each topic so the published dates are not changed but don’t worry. About 95% of the questions in the exam were posted here.
Hi Everyone,
Could anyone let me have the correct answer for the following? coz its look like in different places people have different views.
Q: How many interfaces on R1 should be configured as ip nat inside to grant external access to the network ? Point here to be noticed, int fa 0/1.1 have been shown twice with 2 different ip address. its very confusing.
Subinterfaces should be also configured with the command “ip nat inside” if you want the subnet of this subinterface to be translated.
Hi Ruben, Thanks,
I am sure you have noticed in the exhibit, R1 has two sub-interfaces as fa0/1.1 with one ip address and another with same sub int fa0/1.1 with different ip. whats up with that, do you have any idea, pls advise, thanks in advance for your help.
@T Indu
I think there’s a mistake on the exhibit, for the trunk link to work it needs at least two different subinterfaces. It is not possible to configure two diferent subnets for the same subinterface. it should be fa0/1.1 and fa0/1.2 instead of fa0/1.1 and fa0/1.1.
DID IT!!…907…thx 9tut!!!!..CCNA certified….tons of questions from this site…read from top to bottom every question, because you will not know what pops up…q1, 3 on exam..good luck to all..
Ruben, Thanks for your comments.. Just have done it,,,, credit goes to P4S and 9tut. Thank you so much,,, good luck to all
@T Indu, Q: How many interfaces on R1?
If one of the choices there is ONE (1) then it could be the answer since the question is interface meaning the physical interface, don’t be confused with subinterface… Maybe I’m wrong…
WONDERFUL Post.thanks for share..extra wait !!!
Pls, can somebody send me the latest dumps, i have exam this month,
my email is asholet98@hotmail.com
Thanks
can any one send me the latest dumps.will be writng in two days
my email is millicentotchere@yahoo.com
I have a question about how to simulate an Internet connection using Packet Tracer. I’m using Packet Tracer version 5.0.I’m using Jeremy Cioara’s CBT Nuggets videos. In the videos, Jeremy is using a small-office network with one router connected to the internet. The router’s E0/1 interface is connected to the Internet (ISP) and has an IP and mask of 68.110.171.98/27. It is connected to the Internet connection (ISP) which has an IP and mask of 68.110.171.97/27. My question is, how do you simulate this in Packet Tracer? I know how to configure the router and set the IP and mask on the E0/1 interface, but how do I configure the Internet connection and give it an IP and mask? Thanks to everyone for their help.
Just cleared my exam with a perfect perfomance (1000/1000)…..GRATITUDES: First and foremost to the almighty God for everythng he has been since i started preparing for this exam abt a year ago! the Todd lamlle (6th edition), this book gave me the foundation i needed and i consider myself one of the fastest subnetting geek thanks to Todd’s chapter on subnetting…then seriously, who wud forget this guy (9tut) thanks alot man,i finished my exam 40 minutes before time thanks to the speed you gave me in simulations…examcollection, thanks alot guys i ddint see any qn that i hadnt met in the dumps before, then the CBT nuggets videos….they cleared (enhanced) all of the concepts i have learned from all of the materials i have already mentioned! thank you all so much…..i will DONATE when i get my credit card! keep the good work going 9tut
ABOUT MY EXAM:
I had total of 50 questions….
Had three simulations….ACL2, same as here at 9tut but modified as the third table of modifications above and i was dealing with host B plus different IP addresses, EIGRP almost the same as here, had to change the AS in router Home 2 from somethng 21 to 221 and add the appropriate networks also i had to delete and add some networks from router Home 1 (central router) and finaly the VTP…same as here just different question to follow the same procedures in resolving
NB: i ddnt see anythng that i had not come across before
for any other enquiries find me at ropamson@gmail.com …..best of luck for everybody working on CCNA
Can someone send me the latest dumps
ryan_blankenship76@yahoo.com
can anyone send me the latest dumps…………….. please send it to me at eng.mohamed71@yahoo.com
Am writing my exam 2mmrw………(Only topic left is wan)…….am so scared.
But am keeping myself busy with 9tut
Which command allows you to verify the encapsulation type (CISCO or IETF) for a frame relay link?
A.
show framerelay map
B.
show framerelay lmi
C.
show inter serial
D.
show framerelay pvc
Correct answer: A
refer to:
http://www.aiotestking.com/cisco/2011/08/which-command-allows-you-to-verify-the-encapsulation-type-cisco-or-ietf-for-a-frame-relay-link/#comment-1635
Can somebody explain why correct answer is A?