Which of the following statements are true about routers? Each correct answer represents a complete solution. Choose all that apply.
A. Routers are responsible for making decisions about which of several paths network (or Internet) traffic will follow.
B. Routers act as protocol translators and bind dissimilar networks.
C. Routers organize addresses into classes, which are used to determine how to move packets from one network to another.
D. Routers do not limit physical broadcast traffic.
Which of the following provides users the ability to consistently access multiple message types through a single user interface?
A. Unified messaging
B. SIP presence
C. Chatting
D. Instant messaging
Which of the following is a signaling protocol?
A. NTP
B. SIP
C. STP
D. VTP
All of the following components are required for a softphone end-point except for which one?
A. Microphone
B. PC
C. Sound card
D. Analog phone
Which of the following is a method of displaying multiple parties in a video conference?
A. Session Border Controller (SBC)
B. Multipoint Control Unit (MCU)
C. Multicast
D. Broadcast
What is the data rate of a BRI D channel?
A. 32 Kbps
B. 8 Kbps
C. 64 Kbps
D. 16 Kbps
What is the bit rate of digitized voice using Pulse Code Modulation (PCM)?
A. 32000 bps
B. 64000 bps
C. 16000 bps
D. 8000 bps
You are increasing compression to reduce bandwidth consumption. What effect will this have on voice quality?
A. Voice quality will fluctuate.
B. Voice quality will remain the same.
C. Voice quality will improve.
D. Voice quality will deteriorate.
Which of the following problems in a PSTN circuit can cause noise and thus reduces call quality?
A. Too many phones registering with a gatekeeper
B. Poorly crimped connections
C. Improper grounded lines
D. Mismatched codecs
Which of the following codecs is often considered as the default codec for H.323?
A. G.724
B. G.722
C. G.711
D. G.726
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