Computer Internet Questions and Answers

Answer: C

Correct answer: 1 and 4

Half-duplex Ethernet cannot send and receive at once, so every station shares one collision domain and must use CSMA/CD to detect and recover from collisions. Full duplex has a separate path each way, so collisions cannot occur and collision detection is switched off.

Answer: B

Correct answer: Star

In bus and ring topologies a signal reaches every station, so both are broadcast arrangements. In a star the central device receives each transmission and passes it on only where it is needed, so it is not inherently broadcast.

Answer: B

Correct answer: Google

Google is a search engine; Internet Explorer and Firefox are browsers, which are how a search engine is reached, and Flash was a plug-in for animation.

Answer: B

Correct answer: Subject

The subject line describes what the message is about. To, Cc and Bcc all name recipients rather than content.

Answer: D

Correct answer: Transport layer

The OSI layers in order are physical, data link, network, transport, session, presentation and application. The fourth is therefore the transport layer.

Answer: C

Correct answer: Protocol

A protocol is the set of rules governing how data is exchanged. The internet and the web are what those rules are used to build.

Answer: D

Correct answer: Telephone

A telephone carries speech in both directions at the same time, which is full duplex. A walkie-talkie is half duplex - only one party may speak at a time - and a keyboard or monitor is simplex.

Answer: A

Correct answer: Remote access service

RAS is Remote Access Service - the Windows facility that lets a machine dial in or connect over a network and use resources as though it were attached locally.

Answer: C

Correct answer: Internet Protocol address, identifying a device on a network

An IP address - Internet Protocol address - identifies a device on a network so that data can be routed to it. Two versions are in use. IPv4 uses 32 bits, written as four numbers from 0 to 255 such as 192.168.1.1, giving about 4.3 billion addresses - which have run out. IPv6 uses 128 bits written in hexadecimal groups, giving a number large enough that exhaustion is not a concern. Addresses divide into public ones, unique across the internet, and private ones such as the 192.168 and 10.x ranges, which are reused inside local networks and translated at the boundary by NAT - the main reason IPv4 has lasted so long. They may be static, fixed by configuration, or dynamic, assigned by a DHCP server on joining. A MAC address is different: it identifies the hardware interface itself and does not change with the network.

Answer: C

Correct answer: Use the vertical and horizontal scroll bars

Scrolling changes what is shown without moving the insertion point, so typing would still occur where the cursor was left. Using the keyboard or the page buttons moves the cursor as well.