Computer Internet Questions and Answers

Answer: D

Correct answer: 2, 3 and 5

Full duplex needs a dedicated link between exactly two devices, so it works switch to switch, host to host with a crossover cable, and switch to host. A hub is a shared medium by construction, so any connection involving one must be half duplex.

Answer: C

Correct answer: Bus

Classic Ethernet was a shared coaxial bus along which every station listened, and even when hubs replaced the cable the logic stayed the same: one shared medium with contention resolved by CSMA/CD.

Answer: A

Correct answer: The fastest transfer rate is 56kbps

56 kbps is the ceiling for a dial-up modem on a voice line, but cable and DSL modems run far faster, so the statement is not true of modems in general. The other two statements - the expansion of the name and the use of telephone lines - hold for the dial-up modem the question has in view.

Answer: A

Correct answer: 1 and 1

A table must have at least one cell, which means at least one row and one column.

Answer: A

Correct answer: Star

Bus and ring both deliver every signal to every station, so both are broadcast topologies. In a star the central device forwards each transmission only where it is needed, so the arrangement is not broadcast by nature.

Answer: C

Correct answer: bus

In a bus topology every station taps into the same length of cable, so one break can disable the whole segment. A star gives each node its own cable to a central device.

Answer: B

Correct answer: Optical fiber

Speed here means capacity, and optical fibre carries far more data per second than radio or microwave links - gigabits and beyond against megabits. All three propagate at close to the speed of light, so it is bandwidth rather than propagation that separates them.

Answer: D

Correct answer: All of the above

Remote Access Service is not tied to the telephone: it works over a VPN across the internet, over ISDN, and over DSL, as well as over a dial-up line.

Answer: D

Correct answer: None of the mentioned

HTTP carries web pages, DHCP assigns addresses and DNS resolves names - all three are in daily use on the internet, so none of them is the exception.

Answer: A

Correct answer: Data source

In a mail merge the list of names and addresses is the data source, and the letter is the main document. The two are combined to produce one copy per record.