题目内容

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

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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

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Who would benefit from the advantages of fiber optics ( )?

A. Network architects
B. Soldier
Chef
Driver

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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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Please select the correct statement which mention on the below ( )?

A. light travels a lot further than the constant EMP waves.
B. light degrades much higher than electricity does.
C. light upgrades much slower than electricity does.
D. the constant EMP waves travels a lot further than light.

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