CompTIA CompTIA CTT+ CN0-201 Questions & Answers

• Question 41:

  Which of the following standards defines call intrusion supplementary service?

  A. H.450.10

  B. H.450.12

  C. H.450.9

  D. H.450.11

  Correct Answer: D

• Question 42:

  Which of the following is NOT a part of the Public Switched Telephone Network (PSTN)?

  A. Trunking

  B. Swtiching

  C. Access

  D. Transmission

  Correct Answer: A

• Question 43:

  Which of the following statements is NOT true about unified messaging?

  A. A user can set up voice conference on demand.

  B. A user can forward their voicemail in form of e-mail.

  C. A user can receive a fax in their e-mail.

  D. Unified messaging is the integration of e-mail, fax, and voicemail.

  Correct Answer: A

• Question 44:

  Which of the following is an implementation of the media gateway control protocol architecture for controlling Media Gateways on IP and PSTN networks?

  A. H.248

  B. SIP

  C. H.323

  D. RTCP

  Correct Answer: A

• Question 45:

  Which of the following layers of the OSI model is responsible for the auto detection process of the IP telephone power requirement?

  A. Application layer

  B. Physical layer

  C. Data link layer

  D. Presentation layer

  Correct Answer: B

• Question 46:

  Andrea works as a Technical Representative for KBC Inc. The company has provided two PBXs of different manufacturers to Andrea and she wants to connect these PBXs and ensure that these interconnected PBXs retain their basic and supplementary services.

  Which of the following protocols should Andrea use to accomplish the task?

  A. H.450

  B. Q.931

  C. QSIG

  D. H.225.0

  Correct Answer: C

• Question 47:

  Which of the following is the process of rewriting source and destination addresses of IP packets as they pass through a router or firewall?

  A. PAT

  B. Supernetting

  C. SNAT

  D. NAT

  Correct Answer: C

• Question 48:

  Which of the following OSI layers is responsible for a reliable connection between two hosts on a TCP/IP network?

  A. Physical layer (layer 1)

  B. Session layer (layer 5)

  C. Transport layer (layer 4)

  D. Network layer (layer 3)

  E. Data-Link layer (layer 2)

  Correct Answer: C

• Question 49:

  Which of the following protocols is responsible for host-to-host communication services?

  A. ARP

  B. IP

  C. TCP

  D. IMAP

  Correct Answer: C

• Question 50:

  Which of the following describes the process of not transmitting information over the network when one of the parties involved in a telephone call is not speaking to reduce bandwidth consumption?

  A. Silence suppression

  B. OFDM

  C. PCM

  D. QoS

  Correct Answer: A