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QUESTION NO: 1
H.323 is a group of protocols defined by the International Telecommunication Union for multimedia
conferences over Local Area Networks. H.323 uses ASN.1 binary code.
Which of the following layers of the OSI model is responsible for translating, processing, and reading
ASN.1 and ASCII messages?
A. Transport layer
B. Application layer
C. Physical layer
D. Presentation layer
Correct Answer: D
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: 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: 14
You have just set up a wireless network for customers at a coffee shop. Which of the following are good
security measures to implement?
Each correct answer represents a complete solution. Choose two.
A. Not broadcasting SSID
B. MAC filtering the router
C. Using WEP encryption
D. Using WPA encryption
Correct Answer: CD
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: 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: 11
Which of the following are examples of interactive communication? Each correct answer represents a
complete solution. Choose all that apply.
A. Video Conferencing
B. E-mail
C. Fax
D. Phone call
Correct Answer: AD
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: 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: 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
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