CCNA Practice Questions
CCNA Practice Questions with Multiple choice for Recent Graduates and Professionals to help them in their interview preparations.:
Q1. Which of the following is Class C IP address?
A. 10.10.14.118
B. 135.23.112.57
C. 191.200.199.199
D. 204.67.118.54
Correct Answer: D.
Explanation:
IP addresses are written using decimal numbers separated by decimal points. This is called dotted decimal notation of expressing IP addresses.
Q2. You have an IP of 156.233.42.56 with a subnet mask of 7 bits. How many hosts and subnets are possible?
A. 126 hosts and 510 subnets
B. 128 subnets and 512 hosts
C. 510 hosts and 126 subnets
D. 512 subnets and 128 hosts
Correct answer: C
Explanation:
Class B network has the form N.N.H.H, the default subnet mask is 16 bits long.
There is additional 7 bits to the default subnet mask. The total number of bits in subnet are 16+7 = 23.
This leaves us with 32-23 =9 bits for assigning to hosts.
7 bits of subnet mask corresponds to (2^7-2)=128-2 = 126 subnets.
9 bits belonging to host addresses correspond to (2^9-2)=512-2 = 510 hosts.
Q3. Two sub layers of OSI Data Link layer are which of the following? [Select 2].
A. Logical Link Control
B. Data Link Control
C. Media Access Control
D. Physical Layer Control
Correct answer: A,C
Q4. Match the following:
A. Repeaters 1. Data Link Layer
B. Bridges 2. Network Layer
C. Routers 3. Physical Layer
Select the best combination:
A. A —>2, B—>3, C—>1
B. A—>3, B—->1, C—->2
C. A—>3,B—–>2, C—->1
D. A—->1, B—->2, C—->3
Correct answer: B
Q5. Which of the following are session layer standards? [Select 2].
A. NFS
B. SQL
C. JPG
D. MIDI
Correct answer: A,B
Q6. Match the corresponding layers of ISO and DoD models?
DoD Model <———> ISO OSI Model
A. Process/Application 1. Application
B. Host-to-Host 2. Presentation
C. Internet 3. Session
D. Network Access 4. Transport
5. Network
6. Data Link
7. Physical
Choose best choice:
A. A->1+2; B->3+4; C->5; D->6+7
B. A->1+2+3; B->4; C->5; D->6+7
C. A->1+2+3; B->4; C->5+6; D->7
D. A->1+2+3; B->4+5; C->6; D->7
Correct answer: B
Q7. What is the command used to add a banner to a Cisco router configuration?
A. add banner
B. banner motd #
C. motd banner #
D. add banner #
Correct answer: B
Q8. What is the default administrative distance for RIP?
A. 100
B. 120
C. 0
D. 200
Correct answer: B
Q9. The Cisco Catalyst 1900 switches support which three LAN switch types? [Select 3].
A. Store-and-Forward
B. FragmentFree
C. InstaSwitch
D. FastForward
Correct answer: A,B,D
Q10. Which is true regarding VLANs?
A. VLAN technology uses VLAN switches (layer 2) which is a substitute for routing technology which uses routers.
B. A VLAN has same collision domain
C. A VLAN has same broadcast domain
D. VLANs are less secure with respect to simple switch or Hub networks.
Correct answer: C
Q11. Your internet work consists entirely of Cisco devices. You have given a command “show cdp neighbors”. In the response, you get “S” under the head “Capability”. What does the letter “S” mean?
A. It means “Source Route Bridge”
B. It means “Host”
C. It means “Switch”
D. It means “Static”
Correct answer: C
Q12. You want to verify the encapsulation type being used at Data Link layer for interface s0. Which command can you use?
A. Sh ip protocol
B. sh int s0
C. sh ip interface
D. sh processes
Correct answer: B
Q13. You want to run 802.2 frame type on your Ethernet interface. Which encapsulation type has to be chosen?
A. Ethernet_II
B. 802.2
C. SAP
D. SNAP
Answer is C
Q14. What does -1 signify in an extended IPX access list?
A. permit this host
B. deny this host
C. permit only this subnet
D. any host or any network
Correct answer: D
Q15. Which command sequence will allow only traffic from network 185.64.0.0 to enter interface s0?
A. access-list 25 permit 185.64.0.0 255.255.0.0
int s0 ; ip access-list 25 out
B. access-list 25 permit 185.64.0.0 255.255.0.0
int s0 ; ip access-group 25 out
C. access-list 25 permit 185.64.0.0 0.0.255.255
int s0 ; ip access-list 25 in
D. access-list 25 permit 185.64.0.0 0.0.255.255
int s0 ; ip access-group 25 in
Correct answer: D
Q16. Which of the following are reference points relevant to ISDN? [Select 2].
A. T
B. U
C. V
D. X
Correct answer: A,B
Q17. Which is true about VLAN Trunk Protocol? [Select 2].
A. VTP is statically configured and no built in intelligence is available.
B. VTP provides intelligence for configuring switches across the network.
C. VTP is not designed to distribute information across the switch fabric.
D. VTP is designed to distribute information across the switch fabric.
Correct answer: B, D
Q18. Which of the following is a term associated with WAN terminology / is a WAN device? [Select all that apply].
A. Demarc
B. DSU/CSU
C. Modem
D. CPE
Correct answer: A, B, C, D
Q19. Which of the following can be used to view the previous command you entered into a Cisco router? [Select 2].
A. CTRL+F1
B. The Down Arrow
C. The Up Arrow
D. CTRL + P
Correct answer: C, D
Q20. What is true about static VLANs? [Choose the best answer].
A. The VLAN is configured by a TFTP server.
B. It automatically notify a new network user.
C. The administrator assigns VLAN by port.
D. Static VLAN are more appropriate when the switch fabric becomes more complex.
Correct answer: C
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this second question is correct according to before versions of ios 8.3 and previous versions,by using ip-subnetting zero command.
In previous versions the formula for subnet is (2^n)-2.
i.e., 2^7-2=128-2=126.
But in new versions of ios the formula is 2^n.i.e., 2^7=128.
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Question number 2 : both answers are correct , in old routers they subtract 1st and last subnet cause fisrt subnet includes the ip address of whole network and last subnet consists of broadcast address of whole network. But today’s latest routers have a command which runs by default on them ‘ ip subnet zero’
Which redirects routers that it can take 1st and last subnet. It prevents wastage of ip addresses of 1st and last subnet.
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Which of the Link State in Routing Protocols??????
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Biran is correct, you do not subtract 2 from the number of subnets, only from the number of hosts per subnet.
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Answer in Q2 is wrong. The correct answer is:
Class B network has the form N.N.H.H, the default subnet mask is 16 bits long.
There is additional 7 bits to the default subnet mask. The total number of bits in subnet are 16+7 = 23.
This leaves us with 32-23 =9 bits for assigning to hosts.
7 bits of subnet mask corresponds to (2^7)=128 subnets. ( You do NOT subtract 2 from the ammount of subnets)
9 bits belonging to host addresses correspond to (2^9-2)=512-2 = 510 hosts.
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