CISCO Certification Questions

Q:

Which of the following is a result of route aggregation?

A) Smaller routing tables B) More complete routing tables
C) Increased memory usage D) Increased CPU usage
 
Answer & Explanation Answer: A) Smaller routing tables

Explanation:

Route aggregation results in smaller routing tables.

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Q:

Which of the following connection mechanism is used by Ethernet?

A) Token passing B) CSMA/CD
C) CSMA/CA D) Host polling
 
Answer & Explanation Answer: B) CSMA/CD

Explanation:

Ethernet networking uses Carrier Sense Multiple Access with Collision Detection (CSMA/CD), a protocol that helps devices share the bandwidth evenly without having two devices transmit at the same time on the network medium.

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Q:

The corporate office sends you a new router to connect, but upon connecting the console cable, you see that there is already a configuration on the router. What should be done before a new configuration is entered in the router?

A) RAM should be erased and the router restarted B) Flash should be erased and the router restarted
C) NVRAM should be erased and the router restarted D) The new configuration should be entered and saved
 
Answer & Explanation Answer: C) NVRAM should be erased and the router restarted

Explanation:

Before you start to configure the router, you should erase the NVRAM with the erase startup-config command and then reload the router using the reload command.

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Q:

Convert FACE1234 16 to dotted decimal.

Answer

Answer: FA 16 = 250 10, CE 16 = 206 10, 12 16 = 18 10, and 34 16 = 52 10

FACE1234 16 = 250.206.18.52 dotted decimal

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Q:

What does CSMA/CD stand for?

A) Carrier Sense Multiple Action with Collision Detection. B) Carrier Sense Multiple Access with Collisionless Delivery
C) Carrier Sense Multiple Action with Collision Detonation D) Carrier Sense Multiple Access with Collision Detection
 
Answer & Explanation Answer: D) Carrier Sense Multiple Access with Collision Detection

Explanation:
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Q:

You are the network administrator and are given the tasks to plan for the future expansion of the network. You decide to subnet the current network of 172.15.0.0. What will be the subnet mask be if every subnet has to allocate 500 hosts.

A) 255.255.0.0 B) 255.0.0.0
C) 255.255.240.0 D) 255.255.254.0
 
Answer & Explanation Answer: D) 255.255.254.0

Explanation:

Explanation: The requirement of having to allocate 500 hosts on each subnet can be achieved by the following: 2^9 = 512. So deducting the broadcast and network address we have 510 possible hosts on each subnet. We used 9 bits to allocate the hosts, this leaves us 7 bits for possible subnets. Those 7 bits in binary is 1111 1110 or 254 in decimal.

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Q:

Which  of the following commands sets the secret password to Cisco?

A) enable secret password Cisco B) enable secret cisco
C) enable secret Cisco D) enable password Cisco
 
Answer & Explanation Answer: C) enable secret Cisco

Explanation:
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Q:

Which of the following is part of the IEEE 802.3u standard?

A) 100Base2 B) 10Base5
C) 100Base-TX D) 1000Base-T
 
Answer & Explanation Answer: C) 100Base-TX

Explanation:

IEEE 802.3u is Fast Ethernet at 100Mbps and covers 100Base-TX, 100BaseT4, and 100Base-FX.

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