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QUESTION NO: 12

Which of the following devices is used to create VLANs in a small network?

A. Repeater

B. Switch

C. Hub

D. Bridge

Correct Answer: B


QUESTION NO: 7

Which of the following ITU standards specifies PCM voice coding at 64 kbps?

A. G.726

B. G.728

C. G.729

D. G.711

Correct Answer: D


QUESTION NO: 4

Which of the following is a mechanism used by the Multimedia Extensions (WME) standard to avoid

contentions in a particular traffic category?

A. Sliding Window Protocol

B. Contention Window (CW)

C. Auto-Rate Fallback

D. Maximum Segment Size (MSS)

Correct Answer: B


QUESTION NO: 6

You work as a network consultant for Net World International. You are designing a network for a client

company. The proposed network will use a class B address for its network. The network will be divided

into thirty-two subnets.

Which of the following subnet masks will you use to design the network?

A. 255.255.252.0

B. 255.252.0.0

C. 255.255.248.0

D. 255.248.0.0

Correct Answer: A


QUESTION NO: 10

Voice over IP is an application that requires efficient use of bandwidth and reliability. VoIP must not suffer

the delays that can be seen at times with Web sites and Web applications.

Which technology can be used to help ensure the efficient transport of VoIP traffic?

A. RTP

B. QoS

C. DNS

D. RSTP

Correct Answer: B


QUESTION NO: 3

Which of the following are endpoints in Cisco Unified Communications? Each correct answer represents a

complete solution. Choose two.

A. Switches

B. Routers

C. Gateways

D. IP phones

Correct Answer: CD


QUESTION NO: 5

Adam works as a Sales Engineer for Umbrella Inc. One of his customers complains that the PBX is getting

reset several times in a day. Adam finds that the power LEDs of PBX are fluttering. He suspects that faulty

power supply is the cause of this problem.

Which of the following troubleshooting tools should Adam use to verify these suspicions?

A. Continuity tester

B. Line tester

C. Volt meter

D. T-BERD 4000

Correct Answer: C


QUESTION NO: 9

Rick, an administrator of a TCP/IP network, wants to achieve the following goals:

l Reduce congestion of network traffic.

l Optimize the utilization of the IP address space.

Which of the following technologies may help him to accomplish the task?

A. Pinging

B. Supernetting

C. Routing

D. Subnetting

Correct Answer: D


QUESTION NO: 8

Which of the following statements are true about session hijacking? Each correct answer represents a

complete solution. Choose all that apply.

A. Use of a long random number or string as the session key reduces session hijacking.

B. It is used to slow the working of victim\’s network resources.

C. TCP session hijacking is when a hacker takes over a TCP session between two machines.

D. It is the exploitation of a valid computer session to gain unauthorized access to information or services

in a computer system.

Correct Answer: ACD


QUESTION NO: 13

Which of the following protocols provides sequence numbers to VoIP packets?

A. TCP

B. RTP

C. UDP

D. SCCP

Correct Answer: B


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