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Cisco 100-890 Practice Test - Questions Answers, Page 2
List of questions
Question 11
Which VoIP network component provides Call Admission Control (CAC), bandwidth control and management, and address translation?
Gatekeeper
Multipoint Control Unit
Gateway
IP Phone
Answer: A
Explanation:
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-overip-networks- part-1/
Question 12
Which two devices can provide a Cisco IP phone the network connection and power necessary for the phone to function in the IP telephony network? (Choose two )
IP phone power adapter with Ethernet port
Cisco Unified Communications Manager PoE port
Cisco TelePresence codec
Cisco Voice Gateway PoE port
Cisco Catalyst PoE switch
Explanation:
Question 13
From the Diagnostics page, which two alerts are clearly marked red? (Choose two )
Out of service
Errors
Blockage
Critical
Warning
Explanation:
Question 14
What is an example of a video codec?
G.729
AAC
H.265
ILBC
Explanation:
https://en.wikipedia.org/wiki/Video_coding_format#:~:text=Examples%20of%20video%20coding%20formats,RV40%2C%20VP9%2C%20and%20AV1.
Question 15
How do digital voice networks function?
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The voice gateway can perform only a compression function
Both a digital signal and noise are boosted by amplifiers
The analog signal from the telephone is digitized into PCM signals by the voice codec
Digital voice networks convert the sound waves into electrical signals that are analogous to the original sound waves
Explanation:
Question 16
Which collaboration endpoint is considered an all-in-one unit that is designed to video-enable small collaboration spaces?
Telepresence SX10 Quick Set
Telepresence SX20 Quick Set
Cisco MX800
Telepresence SX80 Codec
Cisco MX300 G2
Explanation:
Question 17
Which two services are provided in a cloud deployment? (Choose two.)
meeting services
messaging services
video devices
Telepresence 3
phone devices
Explanation:
Question 18
While replacing a Cisco IP phone, the technician notices that the phone is not functional The phone is receiving power from a Cisco Catalyst PoE switch, and the phone backup software image is loaded but the phone still fails to complete the bootup To recover the phone what is the next approach?
verify the IP phone settings on the Cisco Unified CM
contact a Cisco TAC engineer
perform the factory reset on the IP phone
connect the IP phone to a different VLAN on another Cisco Catalyst switch
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Explanation:
Question 19
Which network administration command-line tool is available in many computer operating systems for querying the Domain Name System (DNS)?
nslookup
ping
netstat -a
traceroute
Explanation:
Question 20
What provides the coding and decoding translation between analog and digital facilities?
Transformer
Translator
Converter
Codec
Explanation:
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