先試後買

A. They operated at a high frame rate

B. They operated at a high expense.

C. They had not been invented yet.

D. They produced an unreliable image quality

E. They produced high-resolution image quality

A. quick dialing

B. call setup

C. call tear-down

D. transmission of audio/video media between endpoints

E. phone book service

A. Cisco Touch 10 control unit

B. computer

C. Smartphone

D. Cisco remote control

A. through Cisco Discovery Protocol from the voice gateway

B. through Cisco Discovery Protocol from the DHCP server

C. through Cisco Discovery Protocol from the Cisco Unified CM

D. through Cisco Discovery Protocol from the switch

A. Domain Name System (DNS)

B. Network Time Protocol (NTP)

C. Cisco Discovery Protocol

D. Dynamic Host Configuration Protocol (DHCP)

A. no network connection

B. standby mode

C. normal operation

D. incoming call

A. CTL specifies a list of configuration files that the phone can download from the TFTP server

B. CTL defines how the Cisco IP Phone communicates with Cisco Unified CM and provides a phone with its load ID

C. CTL contains a list of Cisco Unified CM and TFTP servers that the IP phone is authorized to connect to.

D. CTL contains a list of certificates and feature licenses that the IP phone is authorized to use