QCM : Fundamentals of Computer Networking — 12 questions

Explication

WLAN / WiFi is a wireless medium that sends data using radio waves. Twisted-pair, coaxial cable, and fiber optic cable are wired media.

Explication

Fiber optic cable is a wired medium that carries optical signals as light. Radio waves describe wireless media, not fiber.

Explication

A Permanent Link is the fixed installation part, while a Channel Link includes the fixed cabling and patch leads. That is why the Channel Link has the larger total length limit.

Explication

UTP stands for unshielded twisted pair, meaning the cable uses twisted copper pairs without shielding. The other options do not match the cabling standard abbreviation.

Explication

A CAT category such as CAT5e or CAT6 is a performance rating that indicates properties like bandwidth and signal quality. It is not a length or device-count label.

Explication

A copper data cable is designed to carry Ethernet signals over twisted copper conductors. Fiber uses light, and radio links use wireless transmission.

Explication

In a star topology, many connections converge on one central switch or core device, so that device becomes a single point of failure. A ring topology depends on a loop instead.

Explication

Ring designs can be harder to expand and diagnose because behavior depends on the loop structure. The single point of failure issue is more characteristic of a central star device.

Explication

Primary cabling is the segment from the main distribution area to lower distribution points. Secondary cabling and tertiary cabling serve lower levels closer to outlets and end devices.

Explication

EV and GV are the floor distributor and building distributor components used to organize structured cabling levels. The other pairs are not building distributor components.

Explication

A computer network consists of connections between independent computers of different types that allow data exchange. The other options describe a device, a cable, or a wireless standard.

Explication

DHCP is the service used to assign IP addresses automatically to devices on a network. DNS resolves names, while FTP and SMTP are different data services.