TIA Convergent Network Technologies 認定 CCNT 試験問題:

1. How does frame relay handle errors?

A) Corrupt packets are discarded, and no other action is taken.
B) The sending device is notified of the error so it can retransmit the packet.
C) Frame relay does not check for errors.
D) Errors are corrected immediately upon detection.

2. Computer-telephone integration systems could incorporate the use of:

A) The public data network, key telephone systems or PBX systems, computer networks, signal processing boards.
B) The telephone network, central office switching systems, computer networks, signal processing boards.
C) The telephone network, key telephone systems or PBX systems, computer networks, sound boards.
D) The telephone network, key telephone systems or PBX systems, computer networks, signal processing boards.

3. Your modem uses the ITU V.32 modem protocol. This modem modulates the signal by using 1 of 16 different combinations of phase and amplitude. What modulation scheme is being used?

A) FSK
B) QAM
C) KBPS
D) DPSK

4. Which is the application programming interface intended for PBX systems running with a Novell LAN on a client/server network?

A) TAPI
B) WOSA
C) JTAPI
D) TSAPI

5. Which of the following is true about DSL?

A) The data portion of the DSL line is connected on demand.
B) DSL requires separate transmission lines.
C) DSL carries only data.
D) DSL originally referred to access transmission for ISDN.

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