CISCO Certification Questions

Q:

Which layer ensures the trustworthly transmission of data across a physical link and is primarily concerned with physical addressing, line discipline, network topology, error notification, ordered delivery of frames, and flow control?

Answer

PDUs at the data link layer are called frames and provide physical addressing, plus other options to place packets on the network medium.

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Subject: CCNA

0 1991
Q:

What are the purposes of areas in an OSPF network?

Answer

Areas allow the design of a hierarchical network. Routes can be summarized or blocked in an area to reduce the amount of routing information on internal OSPF routers.

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Subject: CCNP

2 1985
Q:

Some colleagues are discussing QoS, and are interested in jitter. What is jitter?

A) Jitter refers to the variation in delay experienced by packets B) Jitter is a flickering effect sometimes seen on streaming video.
C) Jitter is a predefined settings package that provides optimal QoS for IP telephony use. D) Jitter is a clicking noise that can be heard on some VoIP calls. It is caused by loss of UDP packets.
 
Answer & Explanation Answer: A) Jitter refers to the variation in delay experienced by packets

Explanation:
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Filed Under: CCENT

0 1981
Q:

What port number is used for DHCP?

A) 67 B) 68
C) 69 D) Both A and B
 
Answer & Explanation Answer: D) Both A and B

Explanation:
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Filed Under: CCENT

2 1958
Q:

What is the Class B private IP address space?

Answer

172.16.0.0 through 172.31.255.255

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Subject: CCNA

0 1956
Q:

What is the command to copy a Cisco IOS to a TFTP server?

Answer

copy flash tftp

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Subject: CCNA

0 1942
Q:

When is redistribution required for EIGRP?

Answer

Redistribution is required when more than one EIGRP session or process is running and they are identified with different ASNs. Redistribution shares topology information between EIGRP sessions.

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Subject: CCNA

0 1935
Q:

Which commands loads a new version of the Cisco IOS into a router?

A) copy flash ftp B) copy ftp flash
C) copy flash tftp D) copy tftp flash
 
Answer & Explanation Answer: D) copy tftp flash

Explanation:

The command copy tftp flash will allow you to copy a new IOS into flash memory on your router.

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Filed Under: CCNA

0 1927