100-890 Online Practice Questions and Answers

What might require certificate validation before being used?

A. Transport Layer Devices

B. Transport Layer Protocols

C. Transport Layer Networking

D. Transport Layer Security

What provides the coding and decoding translation between analog and digital facilities?

A. Transformer

B. Translator

C. Converter

D. Codec

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?

A. verify the IP phone settings on the Cisco Unified CM

B. contact a Cisco TAC engineer

C. perform the factory reset on the IP phone

D. connect the IP phone to a different VLAN on another Cisco Catalyst switch

Which protocol is designed to time-synchronize a network of machines?

A. Network Time Protocol (NTP)

B. Cisco Discovery Protocol

C. Domain Name System (DNS)

D. Dynamic Host Configuration Protocol (DHCP)

What are two benefits of using the Cisco Ceiling Microphone?(Choose two)

A. Smartphone connectivity

B. portable

C. directional

D. frees up table space

E. higher volume

From the Diagnostics page, which two alerts are clearly marked red? (Choose two )

A. Out of service

B. Errors

C. Blockage

D. Critical

E. Warning

Which misled Certificate Authorities {CAs) are necessary to validate the certificates of external servers (HTTPS and syslog)?

A. Custom

B. Custom and Collaboration Edge

C. Collaboration Edge

D. Preinstalled

How can Quality of Service be described?

A. Speed is the maximum amount of Information in bits per second that can be transmitted across a network

B. Relay is the finite amount of time that it takes a packet to reach the receiving endpoint after being transmitted from the sending endpoint

C. Packet loss is a relative measure of the number of packets that were not received compared to the total number of packets transmitted

D. Latency is the difference in the end-to-end delay between packets

Which command is less technical for "latency"?

A. nslookup

B. ping

C. netstat -a

D. traceroute

Refer to the exhibit.

Which component can be found in the Cisco Webex Room 70D system left screen Host CPU Screen control unit POU Codec?

A. Host CPU

B. Screen control unit

C. PDU

D. Codec