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CCNA – Basic Questions

November 12th, 2011 Go to comments

Here you will find answers to CCNA – Basic Questions

Question 1

For which type of connection should a straight-through cable be used?

A. switch to switch
B. switch to hub
C. switch to router
D. hub to hub
E. router to PC


Answer: C

Explanation

To specify when we use crossover cable or straight-through cable, we should remember:

Group 1: Router, Host, Server
Group 2: Hub, Switch
One device in group 1 + One device in group 2: use straight-through cable
Two devices in the same group: use crossover cable

In this case we can use straight-through cable to connect a switch to a router -> C is correct.

Question 2

Which type of cable is used to connect the COM port of a host to the COM port of a router or switch?

A. crossover
B. straight-through
C. rolled
D. shielded twisted-pair


Answer: C

Explanation

The correct question should be “Which type of cable is used to connect the COM port of a host to the CONSOLE port of a router or switch?” and the correct answer is rollover cable. But we can’t plug this rollover cable directly into our host because it will not work. We often use a RJ45 to DB9 Female cable converter as shown below:

rollover_db9cable.jpg

Question 3

What is the first 24 bits in a MAC address called?

A. NIC
B. BIA
C. OUI
D. VAI


Answer: C

Explanation

Organizational Unique Identifier (OUI) is the first 24 bits of a MAC address for a network device, which indicates the specific vendor for that device as assigned by the Institute of Electrical and Electronics Engineers, Incorporated (IEEE). This identifier uniquely identifies a vendor, manufacturer, or an organization.

Question 4

In an Ethernet network, under what two scenarios can devices transmit? (Choose two)

A. when they receive a special token
B. when there is a carrier
C. when they detect no other devices are sending
D. when the medium is idle
E. when the server grants access


Answer: C D

Explanation

Ethernet network is a shared environment so all devices have the right to access to the medium. If more than one device transmits simultaneously, the signals collide and can not reach the destination.

If a device detects another device is sending, it will wait for a specified amount of time before attempting to transmit.

When there is no traffic detected, a device will transmit its message. While this transmission is occurring, the device continues to listen for traffic or collisions on the LAN. After the message is sent, the device returns to its default listening mode.

So we can see C and D are the correct answers. But in fact “answer C – when they detect no other devices are sending” and “when the medium is idle” are nearly the same.

Question 5

Which two benefits are provided by using a hierarchical addressing network addressing scheme? (Choose two)

A. reduces routing table entries
B. auto-negotiation of media rates
C. efficient utilization of MAC addresses
D. dedicated communications between devices
E. ease of management and troubleshooting


Answer: A E

Question 6

When a host transmits data across a network to another host, which process does the data go through?

A. standardization
B. conversion
C. encapsulation
D. synchronization


Answer: C

Explanation

To transmit to another host, a host must go through the TCP/IP model (very similar to the OSI model). At each layer, the message is encapsulated with that layer’s header (and trailer if it has). This process is called encapsulation.

Question 7

Which two Ethernet fiber-optic modes support distances of greater than 550 meters?

A. 1000BASE-CX
B. 100BASE-FX
C. 1000BASE-LX
D. 1000BASE-SX
E. 1000BASE-ZX


Answer: C E

Explanation

Below lists the cabling standards mentioned above

Standard Cabling Maximum length
1000BASE-CX Twinaxial cabling 25 meters
100BASE-FX Two strands, multimode 400 m
1000BASE-LX Long-wavelength laser, MM or
SM fiber		 10 km (SM)
3 km (MM)
1000BASE-SX Short-wavelength laser, MM fiber 220 m with 62.5-micron fiber; 550 m
with 50-micron fiber
1000BASE-ZX Extended wavelength, SM fiber 100 km

Note:

+ MM: Multimode
+ SM: Single-mode

(Reference: The official self-study test preparation guide to the Cisco CCNA INTRO exam 640-821)

Question 8

Refer to the exhibit. What type of connection would be supported by the cable diagram shown?

Pin Color Function Pin Color Function
1 White/Green TX+ 1 White/Green TX+
2 Green TX- 2 Green TX-
3 White/Orange RX+ 3 White/Orange RX+
6 Orange RX- 6 Orange RX-

A. PC to router
B. PC to switch
C. server to router
D. router to router


Answer: B

Explanation

From the “Pin” and “Color” in the exhibit we know that this is a straight-through cable so it can be used to connect PC to switch.

Question 9

Refer to the exhibit. What type of connection would be supported by the cable diagram shown?

Pin Color Function Pin Color Function
1 White/Green TX+ 3 White/Green RX+
2 Green TX- 6 Green RX-
3 White/Orange RX+ 1 White/Orange TX+
6 Orange RX- 2 Orange TX-

A. PC to router
B. PC to switch
C. server to switch
D. switch to router


Answer: A

Explanation

This is a crossover cable so it can be used to connect PC and router.

rj45-crossover-cable.jpg

Question 10

Which two topologies are using the correct type of twisted-pair cables? (Choose two)

A. connection_pc_switch.jpg

B. connection_router_pc.jpg

C. connection_switch_router.jpg

D. connection_switch_pc.jpg

E. connection_switch_switch.jpg


Answer: D E

Comments (300) Comments
Comment pages
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  1. GIG
    January 23rd, 2012

    thanks a lot to 9tut…… i gave the exam CCNA , i got passed…. thank god

  2. islam
    January 24th, 2012

    @tut
    which command will show the MAC addresses of stations connected to swith ports??
    A. show ma-address
    B. show arp
    C. show table
    D. show swithport

    in dump A , and another dump take B
    SO what is the correct one?

    in NAT
    what does ” prefix-length 19″ mean ????

  3. islam
    January 24th, 2012

    @9tut
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    B. the default gateway is the broadcast for this subnet
    C. the IP address is the broadcast for this subnet
    D. the IP address is an invalid class D multicast address

    plz answer me i have an exam tomorrow

  4. islam
    January 24th, 2012

    @9tut

    identify the four valid IPV6 addresses
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    C. 2000::
    D. 2001:3452:4952:2837::
    E. 2002:c0a8:101::42

    plz answer me
    F. 2003:dead:4dad:23:46:bb:101

  5. 9tut
    January 24th, 2012

    @islam:
    + 223.5.14.7 is the broadcast address of this subnet -> ping will not work.
    + For IPv6 question, please read Question 7 of this link for the answer & explanation: http://www.9tut.com/ccna-ipv6

  6. Anonymous
    January 25th, 2012

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  7. Anonymous
    January 25th, 2012

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  8. husain
    January 27th, 2012

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    God bless

  9. islam
    January 27th, 2012

    @9tut
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    thank you again and all in 9tut

  10. Anonymous
    January 27th, 2012

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    topology was the same. But ip addressing and question were slightly different.

    Thanks once again, and best of luck to all those studying for the exams.

  11. Anonymous
    January 27th, 2012

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  14. Naeem KhaN (pesh,CHD)
    January 29th, 2012

    Alhamd_u_lillah i did my CCNA yesterday with marks 947/1000. the paper is easy but u need to study wel and must consultat on sims.one other thing All question and sims i got in paper same is here in 9tut. this site is very very gud for CCNA thanks my Allah,parants,friends and 9tut..
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  16. fatfighter
    January 29th, 2012

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    February 1st, 2012

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    February 2nd, 2012

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  32. sreejith
    February 3rd, 2012

    @9islan,

    its C for your question below.

    https://learningnetwork.cisco.com/thread/30986

    given that hostA and hostB are in different networks. when hostA is trying to communicate with HostB, which step will hostA take first?
    A. send a TCP SYN and wait the SYN ACK with the IP address of Host B
    B. Dope the data
    C. create an ARP request to get a MAC address for hostB
    D. send the data frames to the default gateway
    in dump C
    i think it is D
    explain it to me plz

  33. unani
    February 3rd, 2012

    @sreejith

    It is C. You need to know the destination mac address before sending it to DG

  34. unani
    February 4th, 2012

    @sree
    pc will send out a arp to get desti. mac because it need to encapsulate it into the frame before sending it out.

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    February 5th, 2012

    Q:- Data transfer between source and destination is slow.The quality of service is requested by transport layer in OSI model is not being maintained .To fix the issue at which layer processor shold begin?

    1.Presentation

    2. Session

    3. Transport

    4. Network

    5.Data link

    6 .Physical

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  38. xallax
    February 5th, 2012

    @mahmoud
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    February 6th, 2012

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  47. rakesh shah
    February 6th, 2012

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  48. march
    February 7th, 2012

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    February 7th, 2012

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    All the best guys!!!

  50. Ramesh
    February 7th, 2012

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    February 8th, 2012

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    February 8th, 2012

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    February 8th, 2012

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    February 9th, 2012

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    February 10th, 2012

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    February 13th, 2012

    Hi guys

    Does anyone has the latest dump of CCNA exam.
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  72. Karen
    February 13th, 2012

    Question 10 – why is D correct – router to host over fa 0/0?

  73. Karen
    February 13th, 2012

    Nevermind previous question – figured it out

  74. Sanjee
    February 13th, 2012

    Given Table of question 09 was wrong. One end must be Orange.

  75. Gbobo Anthony
    February 14th, 2012

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    February 14th, 2012

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  77. Virendra pratap
    February 15th, 2012

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    February 16th, 2012

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  81. kollony
    February 16th, 2012

    Many thanks to 9tut.com for providing so much useful information.I am looking forward to take the CCNA test in the next 3 weeks.Would someone be kind enough to send me a copy of latest dumps. kollony77@gmail.com
    Thanks in advance and Godbless.

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    February 16th, 2012

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    February 16th, 2012

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    February 17th, 2012

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    February 17th, 2012

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  87. Jim
    February 17th, 2012

    Are these dumps good enough to pass the exam?

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    February 17th, 2012

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    February 17th, 2012

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    February 19th, 2012

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  93. Anonymous
    February 20th, 2012

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  94. Isuru
    February 20th, 2012

    Hi All

    plz refer the link
    http://s1153.photobucket.com/albums/p518/isuru888/?action=view&current=nwd.jpg

    1.what is the wide Mask mention here
    2. How to derive the answer for this question
    there are three answers given by the dump but i;m not sure about the answer B and E
    (each interface not require an unique ip address )

    plz explain

    regards

  95. KRISHNA GAUR
    February 20th, 2012

    HELLO GUYS…………………….

    THIS IS KRISHNA , I AM GOING TO TAKE MY CCNA EXAM SO PLEASE SUGGEST ME WHAT SHULD I DO AS I AM FRESHER IN THIS LINE.

    SO IF YOU HAVE ANY IMPORTANT MATERIEL FOR STUDYING THEN KINDLY MAIL TO ME ON MY EMAIL ID- krishnagaur1987@gmail.com

    WITH REGARD’S
    KRISHNA GAUR

  96. govind
    February 21st, 2012

    hi,
    guys..i’m going to give the CCNA exam,
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  97. govind
    February 21st, 2012
  98. Jazz
    February 21st, 2012

    Hi guys

    Please email me the latest dump of CCNA. I want to take CCNA exam ASAP.

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  99. rosie
    February 22nd, 2012

    hi every one,

    i am nearing my exam which is next week and i would like to knw the latest dumps. it would me great and i would appriciate if i could get latest dumps from people who hve given the exam lately.

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    Thank you

  100. SAN
    February 22nd, 2012

    Please tell me the exact source of Valid CCNA dumps………….I will appear CCNA Exam in March 2012

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