CCNA – Troubleshooting 2
Here you will find answers to Trouble Shooting Questions (Part 2)
Question 1:
A network administrator is troubleshooting the OSPF configuration of routers R1 and R2. The routers cannot establish an adjacency relationship on their common Ethernet link. The graphic shows the output of the show ip ospf interface e0 command for routers R1 and R2. Based on the information in the graphic, what is the cause of this problem?
A. The OSPF area is not configured properly.
B. The priority on R1 should be set higher.
C. The cost on R1 should be set higher.
D. The hello and dead timers are not configured properly.
E. A backup designated router needs to be added to the network.
F. The OSPF process ID numbers must match.
Answer: D
Question 2:
This graphic shows the results of an attempt to open a Telnet connection to router ACCESS1 from router Remote27. Which of the following command sequences will correct this problem?
A. ACCESS1(config)# line console 0
ACCESS1(config-line)# password cisco
B. Remote27(config)# line console 0
Remote27(config-line)# login
Remote27(config-line)# password cisco
C. ACCESS1(config)# line vty 0 4
ACCESS1(config-line)# login
ACCESS1(config-line)# password cisco
D. Remote27(config)# line vty 0 4
Remote27(config-line)# login
Remote27(config-line)# password cisco
E. ACCESS1(config)# enable password cisco
F. Remote27(config)# enable password cisco
Answer: C
Question 3:
Refer to the exhibit. A network administrator attempts to ping Host2 from Host1 and receives the results that are shown. What is a possible problem?
A. The link between Host1 and Switch1 is down.
B. TCP/IP is not functioning on Host1
C. The link between Router1 and Router2 is down.
D. The default gateway on Host1 is incorrect.
E. Interface Fa0/0 on Router1 is shutdown.
F. The link between Switch1 and Router1 is down.
Answer: C
Explanation:
In this question, Host1 wants to ping Host2 but it receives a reply from the interface Fa0/0 of Router1 (10.1.1.1/24) that the “destination host unreachable”.
If the link between Host1 and Switch1 is down or the link between Switch1 and Router1 is down then Host1 can not receive this reply -> A and F are not correct.
Host1 can receive a reply from 10.1.1.1 -> the TCP/IP is working properly -> B is not correct.
For answer D, if the default gateway was not configured correctly on Host1 (in this case the default gateway should be 10.1.1.1/24) then 10.1.1.1 can not receive the ping packets from Host1 and can not reply for Host1 that the destination is unreachable -> D is not correct.
Interface Fa0/0 on Router1 replies for the ping packets from Host1 so it is up -> E is not correct. If the interface Fa0/0 on Router is shutdown then we will receive a message of “Request timed out”, not “Destination host unreachable”.
Answer C is correct because we can get a reply from the interface Fa0/0 of Router1 so the link between Host1 and Router1 should be fine -> the problem lies at the other side of Router1. But if the link between Router2 and Host2 is down then we will receive a reply from interface S0/1 of Router2 that the “destination host unreachable”. Therefore the problem can just be the link between Router1 and Router2.
Question 4:
Refer to the exhibit. Hosts in network 192.168.2.0 are unable to reach hosts in network 192.168.3.0. Based on the output from RouterA, what are two possible reasons for the failure? (Choose two)
A. The cable that is connected to S0/0 on RouterA is faulty.
B. Interface S0/0 on RouterB is administratively down.
C. Interface S0/0 on RouterA is configured with an incorrect subnet mask.
D. The IP address that is configured on S0/0 of RouterB is not in the correct subnet.
E. Interface S0/0 on RouterA is not receiving a clock signal from the CSU/DSU.
F. The encapsulation that is configured on S0/0 of RouterB does not match the encapsulation that is configured on S0/0 of RouterA.
Answer: E F
Question 5:
When upgrading the IOS image, the network administrator receives the exhibited error message. What could be the cause of this error?
A. The new IOS image is too large for the router flash memory.
B. The TFTP server is unreachable from the router.
C. The new IOS image is not correct for this router platform.
D. The IOS image on the TFTP server is corrupt.
E. There is not enough disk space on the TFTP server for the IOS image.
Answer: B
Respond to Debasish July 7th, 2011
1. E
2. Ctrl + Shift + 6
3. Neighboring devices or to be seen by other devices (cdp)
4. C
5. E
@ 9tut,all
You are working in a data center environment and are assigned the address range 10.188.31.0/23.You are
asked to develop an IP addressing plan to allow the maximum number of subnets with as many as 30
hosts each.Which IP address range meets these requirements?
A. 10.188.31.0/27
B. 10.188.31.0/29
C. 10.188.31.0/26
D. 10.188.31.0/28
E. 10.188.31.0/25
Answer:C
why the answer cannot be A…..?
pls help me
Hi Kaz, did you find out why the answer is A in your question above?
@JM,
nope
help me…………………
A.maximum subnet 16 and maximun host each subnet 30 hosts for network 10.88.30.0/23
given address 10.188.31.0./23 is a host of 10.88.30.0/23..if says start from host 10.188.31.0/23 to the last ip address host max subnets 8 and max hosts 30.
Kaz the answer took me some time to think about it but. There are 30 hosts pro subnet.
with a /27 Network you have 30 hosts pro subnet, but there is no place anymore to place a router.
@needle
well done, thanks
@Kaz,
Host: 2^n-2
= 2^5-2
=( 32-2) =30
10.188.31.11100000
Net—(111)–Hosts—(00000)
Mask
255.255.255.224
8+8+8+3=27
S0, Ans. is( A. 10.188.31.0/27)
Inregards to Q2. Option C.
Access1(config)#line vty 0 4
Access1(config-line)#login
Access1(config-line)#password cisco
Access1(config)#line vty 0 4
Access1(config-line)#password cisco
Access1(config-line)#login
Does it make any difference with the arrangement. The top arrangement has the login, then the password, whilst the second arragement has the password then the login????
Can anyone help? Thanks.
@koffy
where do we want to go? ACCESS1.
where are we getting the error from? ACCESS1.
what device must we configure with a password? ACCESS1…
ACCESS1(config)# line vty 0 4
ACCESS1(config-line)# login
ACCESS1(config-line)# password cisco
to answer your question: no, the order doesnt matter.
please read the question better next time.
@koffy
you can write both
Access1(config)#line vty 0 4
Access1(config)#password cisco
Access1(config)#login
OR
Access1(config-line)#line vty 0 4
Access1(config)#login
% Login disabled on line 66, until ‘password’ is set
% Login disabled on line 67, until ‘password’ is set
% Login disabled on line 68, until ‘password’ is set
% Login disabled on line 69, until ‘password’ is set
% Login disabled on line 70, until ‘password’ is set
Access1(config-line)#password cisco But then you dont have to go through writing this command cause you’ve already done it Access1(config-line)#login thats the only difference
Osman…
we have to select the longest best match answer from list
@kaz n @needle: hey frnds, one of the ip address from the subnet will be assigned to the router. so its gonna be ans A.. 16 subnets and 30 hosts per subnet:)
Which command will show the MAC addresses of stations connected to switch ports?
A. show mac-address
B. show arp
C. show table
D. show switchport
@SAajid: A. show mac-address
Hello everybody!!
How come that in question 2 the 2 routers are containing different Dedignated Router IDs.
I thought they should be the same if the routers exist in the same Multiaccess segment? Please help???
/Bruno
tang ina nyo
Pls can anyone help me with the latest dump.Am taking the exam in two weeks.
emeka062004@yahoo.co.uk
can u please send me the latest dumps to ktbharathi@gmail.com…..thank u….
21. A network administrator is explaining VTP configuration to a new technician. What should the network administrator tell the new technician about VTP configuration? (Choose three.)
**A. A switch in the VTP client mode cannot update its local VLAN database.
**B. A trunk link must be configured between the switches to forward VTP updates.
C. A switch in the VTP server mode can update a switch in the VTP transparent mode.
**D. A switch in the VTP transparent mode will forward updates that it receives to other switches.
E. A switch in the VTP server mode only updates switches in the VTP client mode that have a higher VTP revision number.
F. A switch in the VTP server mode will update switches in the VTP client mode regardless of the configured VTP domain membership.
The correct answer is.
27. OSPF routing uses the concept of areas. What are the characteristics of OSPF areas? (Choose three.)
A. Each OSPF area requires a loopback interface to be configured.
**B. Areas may be assigned any number from 0 to 65535.
**C. Area 0 is called the backbone area.
D. Hierarchical OSPF networks do not require multiple areas.
**E. Multiple OSPF areas must connect to area 0.
F. Single area OSPF networks must be configured in area 1.
Hi everybody / 9tut
Question 4
i’m just a little confuse about Question 4
Refer to the exhibit. Hosts in network 192.168.2.0 are unable to reach hosts in network 192.168.3.0. Based on the output from RouterA, what are two possible reasons for the failure? (Choose two)
showipinterfacebrief
A. The cable that is connected to S0/0 on RouterA is faulty.
B. Interface S0/0 on RouterB is administratively down.
C. Interface S0/0 on RouterA is configured with an incorrect subnet mask.
D. The IP address that is configured on S0/0 of RouterB is not in the correct subnet.
E. Interface S0/0 on RouterA is not receiving a clock signal from the CSU/DSU.
F. The encapsulation that is configured on S0/0 of RouterB does not match the encapsulation that is configured on S0/0 of RouterA.
answer here is E & F
why b is incorrect? please do explain…
@conan
s0/0 is up/down, that’s a problem there (L2 problem – possibly clock rate or encapsulation mismatch).
s0/1 is shut down, we don’t care about it, it’s just one other interface on the router
B is incorect because s0/1 does not affect the routing process. it’s true that that interface is down, but that’s not part of the problem
Can anyone please help me find the correct answer.
What are two effective measures for securing routers? (Choose two.)
a) Protect all active router interfaces by configuring them as passive interfaces.
B) Configure remote administration through VTY lines for Telnet access.
c) Use quotes or phrases to create pass phrases.
d) Disable the HTTP server service.
e) Enable SNMP traps.
The answer is A & B because you want interfaces passive to control the routing information being advertised and of course, have Telnet access so only specific users can access the CLI.
@chad
a) Protect all active router interfaces by configuring them as passive interfaces.
if you configure them all ACTIVE interfaces as passive interfaces then you won’t be sending any routing updates. this would isolate your router from the rest of the routing domain…
b) Configure remote administration through VTY lines for Telnet access.
telnet isn’t all that secure. you should go for SSH
c) Use quotes or phrases to create pass phrases.
making you password complex could improve security… using encryption definitely improves security. i’d pick this one
d) Disable the HTTP server service.
any computer monkey nowadays goes for the web GUI of the router.
by disabling it you can improve the security of your router.
e) Enable SNMP traps.
SNMP traps are used to… send news to the admin of anything that has changed on the router. i don’t see this as a security measure, i see it as a bandwidth/cpu saving method.
http://www.cisco.com/en/US/tech/tk648/tk362/technologies_tech_note09186a0080094aa5.shtml
my answers: C and D
anyone plz explain Q 1
“D. The hello and dead timers are not configured properly.” wt does mean? do they should b same on both router?
@z
yes, they must match
Please send latest ccna dums to my mail, shijothomassss.89@gmail.com
Can sombody send a latest dump on hp34a3801@yahoo.co.in
You guys are killing Cisco and the vendos that teah you but, don’t get you ready for the test. knowing Cisco is a thing, getting ready for the test is another thing….. No dumps are needed….
ALL THE BEST FOR CCNA CANDIDATE………
Hi 9tut
please check this Q
What two results would occur if this hub were to be replaced with a switch that is configured with one Ethernet VLAN? (Select two)
A. The number of broadcast domains would increase.
B. The number of broadcast domains would remain the same.
C. The number of broadcast domains would decrease.
D. The number of collision domains would increase.
E. The number of collision domains would remain the same.
F. The number of collision domains would decrease.
Answer: B, D Explanation:
but the correct answer it should be B and F please advise
@emad
collision domain = all the devices that use the same layer 1 medium. the same cable.
broadcast domain = all the devices that “talk” on the same LAN.
a hub acts like a knot in the ethernet cable. it just splits the cable. it is not a good a thing when there are several devices on that particular segment.
a switch allows the usage of more distinct ethernet cables (more collision domains, this is a GOOD thing).
Question 4. The subnet ranges are 0-4 then 5-8. RouterA is 192.168.1.4, can the router interface be a network address? My calculations have 192.168.1.5 being the first usable IP of the next subnet and 192.168.1.4 being the network address of that subnet… where am I going wrong here? Thanks in advance.
@Kevin: Did you see “show ip int brief” output?
S0/0 on RouterA has IP address 192.168.1.5
192.168.1.4/30 – is a subnet for point-to-point link.
P.S. Subnet ranges for point-to-point links are 0-3, 4-7,8-11 etc.
@Kevin
The answer to this question is a layer 2 problem.
Option E means Interface S0/0 on RouterA is not receiving a clock signal from the CSU/DSU. And also, the encapsulation that is configured on S0/0 of RouterB does not match the encapsulation that is configured on S0/0 of RouterA.
If you analyze the screen shot of RouterA #show ip int brief. You will notice that:
Serial0/0 status is “up” and protocol is “down”…..and that’s where the problem is.
I hope this help.
@Kevin
Option E & F means……………………..
@Koffy and Dims, yes I understand the answer to the question are E & F, what I am confused about is something else in the question and this confusion is causing me problems in multiple areas going forward.
I was under the understanding that neither the network address nor the broadcast address could be used in subnetting a subnet but in Question 4 the S0/0 address is 192.168.1.4/30 this is the network address for that subnet. My question is can the network and broadcast addresses of a subnet be used by the router interfaces.
It is a very simple question but it is also one of those questions where if there is any confusion it will cause you numerous problems in many areas, it is a fundamental and conceptual question one that I have not been able to find any definitive answer for in none of my CCNA reading. Thanks
Q4, there are three possible answers.
B. Interface S0/0 on RouterB is administratively down.
E. Interface S0/0 on RouterA is not receiving a clock signal from the CSU/DSU.
F. The encapsulation that is configured on S0/0 of RouterB does not match the encapsulation that is configured on S0/0 of RouterA.
The reason that the up/down status is because there are no keep-a-live being receive, if the shutdown command is on the other side that could cause this message and also the encapsulation mismatch and not receive a clock will result in the same.
@Kevin
A Serial interface is a point-to-point connection, and therefore /30 will suffice.
192.168.1.4/30 gives you two assignable address>>>>.5 and .6 ……broadcast address is .7 and .8 is the beginning of a new network.
192.168.1.4/30 will be subnetted to service the serial link……point-to-point connection.
I think you are confuse by how 192.168.1.4/30 is subnetted. You should probably practice more on subnetting.
I hope this help.
Koffy, I appreciate your help. I think the simplicity of the question is what’s causing the missed communication. I think I have the answer to my question, my question simply is… Can the router interfaces of any point to point link use the broadcast and or network addresses in a subnet as their IP addresses. From what I am gathering, the answer is NO. So for example, 192.168.1.4 cannot be used as the IP address for S0/0 it has to be .5 or .6. The confusion come in in how the diagram of the question is represented. It makes it appear as if S0/0′s Ip address is 192.168.1.4 when this is just a representation of the subnet.
Thanks
@Anonymous
Something like that. Now you getting it.
Next time check the screen shot too. That gives you additional info.
Serial0/0(Router A) int is “up”>192.168.1.5 and protocol is “down”, that is the far side (Router B interface) where the 192.168.1.6 would have been.
Once the concept is understood, this sort of thing becomes easier and clearer.
Hi 9tut… Hi Guys! Can you please help me… I will take exam this Feb. Please send me latest dump so that I will have an idea for the exam.. rico.blake@ymail.com
Thanks Guys!
Hi 9tut,
how do i get the latest dumbs for my cisco exam. I have the todd lamme 6th edition of ccna textbook.
will be looking forward to your prompt response.
kemmy23401@yahoo.com
Thanks!
Hi 9tut,
How do I get the latest dumps for the ccna? I will be taking test 3/9/2012
kimberlyc1904@yahoo.com
Thanks!
Hi friends plz read dumps before one week or a month don’t follow the dumps before one month becoz it will not be valid
Hi Srinivasan,
Thanks for your comment.
all the best.
Q3 was there in today’s exam.
http://www.examcollection.com/cisco/Cisco.Acme.640-802.v2012-02-07.by.Arpit.486q.vce.file.html
Most Valid Dump.. All most 99% answers are correct.
Hi Guys.
Anyone can elaborate Q4..I’m quite confused.
Thanks!
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Dana