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 CCNA Questions

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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:

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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Q:

When a PC sends a packet to another PC in a remote network, what destination IP address and MAC address will be in the frame that it sends to its default gateway?

Answer

It will use the gateway interface MAC at L2 and the actual destination IP at L3. 

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Q:

What is the address range of a Class B network address in binary?

A) 01xxxxxx B) 0xxxxxxx
C) 10xxxxxx D) 110xxxxx
 
Answer & Explanation Answer: C) 10xxxxxx

Explanation:

The range of a  Class B network address is 128 - 191. This makes our binary range 10xxxxxx.

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Q:

Which IEEE committee has been sanctioned by WAP and is called WPA2?

Answer

The IEEE 802.11i standard has been sanctioned by WPA and is termed WPA version 2.

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