Data Transmission | MCQs

Explanation

1. Simplex: Data flows in one direction only (e.g., keyboard to computer).
2. Half-Duplex: Data can flow both ways, but not at the same time (e.g., walkie-talkies).
3. Full-Duplex: Data flows both ways simultaneously (e.g., telephone conversations).

Explanation

A modem's purpose is to convert digital information to analog signals (modulation), and to convert analog signals back into useful digital information (demodulation).

MODEM stands for Modulation and Demodulation.

Explanation

Fiber optics uses light to transmit data at high speeds through thin glass or plastic fibers.

It is mainly used in communication networks like internet, telephone, and cable TV.

Explanation

Twisting copper wires (as in twisted pair cables) helps cancel out electromagnetic interference from external sources and reduces crosstalk between adjacent wires.

This method improves signal quality in data transmission.

Explanation

A telephone line supports full-duplex transmission, meaning both parties can talk and listen simultaneously.

Unlike half-duplex (e.g., walkie-talkie).

Full-duplex allows two-way communication at the same time.

Explanation

Coaxial cables typically support data transmission speeds between 10 Mbps to 200 Mbps, used in cable TV and internet.

They are shielded and suitable for medium-speed data over longer distances than twisted-pair cables.

Explanation

MP4 (MPEG-4 Part 14) is a widely used container format for transmitting streaming videos online.

It supports various codecs, including H.264, which is known for its efficient compression and compatibility with most devices. 

Why other options are incorrect:

AVI (Audio Video Interleave):

While AVI is a common video format, it's not as optimized for streaming as MP4.

It can be larger and less efficient for online delivery. 

WMA (Windows Media Audio):

WMA is primarily an audio format, not designed for video streaming. 

WAV:

WAV is a pure audio format used for high-quality recordings.

It's not suitable for streaming video. 

Explanation

Explanation

• Fiber optic technology uses cables made of thin strands of glass or plastic fibers to transmit data as light signals.
• It providing high-speed and high-capacity communication.

Explanation

 Session Layer is the layer of the ISO Open Systems Interconnection (OSI) model that controls the dialogues (connections) between computers.

It establishes, manages, and terminates the connections between the local and remote application.