Which VoIP network component provides Call Admission Control (CAC), bandwidth control and management, and address translation?
Answer : A
Gatekeeper: A gatekeeper provides Call Admission Control (CAC), bandwidth control and management, and address translation.
http://what-when-how.com/cisco-voice-over-ip-cvoice/voip-fundamentals-introducing-voice-over-ip-networks-part-1/
What are two benefits of using the Cisco Ceiling Microphone?(Choose two)
Answer : C, D
https://www.cisco.com/c/en/us/products/collateral/collaboration-endpoints/telepresence-microphones/datasheet-c78-736073.html
Which type of network can transmit data voice and video or any combination of these services over the same networks?
Answer : D
How do digital voice networks function?
Answer : D
Which two components will Cisco Webex Room 55 Dual support? (Choose two.)
Answer : C, D
https://www.cisco.com/c/en/us/products/collateral/collaboration-endpoints/webex-room-series/datasheet-c78-741051.html
What provides the coding and decoding translation between analog and digital facilities?
Answer : D
What are two reasons that video conferencing solutions developed before the 1990s were impractical? (Choose two)
Answer : A, B