If you want to join a video-conferencing, the hardware you may need are ( ).
A. Video camera, microphone and speakers.
B. Microphone, speakers and keyboard.
C. Mouse, microphone and speakers
D. Switch, mouse and keyboard
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These statements on the below are about SMS and Wireless Communications, which one is correct ( )?
A. SMS enables the transmission of alphanumeric messages between mobile subscribers and internal systems.
B. Messages can be no longer than 160 alpha-numeric characters and must contain no images or graphics in the very first.
C. Once a message is sent, it is received by a Multimedia Messaging Service (MMS).
D. A, B and C
Which type is the most popular for the online courses during the COVID-19 period ( ).
A. Instant Messaging
B. Internet telephone
C. Video-Conferencing
D. Email
Who would benefit from the advantages of fiber optics ( )?
A. Network architects
B. Soldier
Chef
Driver
Electricity is applied to one end of the wires and it travels to the far end where it is received as a ( )?
A. voice.
B. information.
C. data
D. signal.
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