Computer Internet Questions and Answers

Answer: A

Correct answer: Wireless network

Wi-Fi is the trade name for wireless local networking over the IEEE 802.11 standards. The name suggests wireless fidelity but was coined as a brand rather than as an abbreviation.

Answer: D

Correct answer: A network covering a small area such as an office or building

A LAN, or Local Area Network, connects devices within a small area - a room, a building, a campus - typically over Ethernet cable or Wi-Fi, and typically owned and administered by one organisation. The classification by geographic scale runs: PAN for a personal area of a few metres, as with Bluetooth; LAN for a building or campus; MAN for a metropolitan area such as a city; and WAN for anything larger, of which the internet is the largest example. The differences are not only of size. A LAN has high bandwidth, low latency and low error rates because the distances are short and the medium is owned; a WAN uses leased lines or public infrastructure and is slower and less reliable in proportion. A VPN creates an encrypted tunnel across a public network so that a remote device behaves as though it were on a private LAN.

Answer: A

Correct answer: network layer

Choosing the path a packet takes across an internetwork is the network layer's function, which is why routers are layer 3 devices. The data link layer moves frames across a single link only.

Answer: B

Correct answer: Format a main document

The merge process is: identify the main document, prepare the data source, insert the merge fields, preview the result and complete the merge. Formatting the main document is ordinary editing and is not one of the steps the wizard defines.

Answer: C

Correct answer: https

A URL breaks into recognisable parts, and https before the colon is the scheme or protocol - it says how the resource is to be fetched. The rest divides as follows. www is a subdomain, a conventional but entirely optional label. example.com is the domain name, of which .com is the top-level domain. /page.html is the path to the resource on that server. A URL may also carry a port after a colon, a query string after a question mark, and a fragment after a hash - the fragment being handled by the browser alone and never sent to the server. Other schemes exist besides http and https: ftp for file transfer, mailto for an email address, and file for a local file. URL stands for Uniform Resource Locator.

Answer: A

Correct answer: World wide web

WWW stands for the World Wide Web - the system of linked hypertext documents carried over the internet, which is the network beneath it.

Answer: B

Correct answer: A small piece of data a website stores in the browser

A cookie is a small piece of data a site asks the browser to store and to send back with every subsequent request to that site. It exists because HTTP is stateless: the server remembers nothing between requests, so a cookie is what allows it to recognise a returning visitor. That is how a login persists, how a shopping basket survives navigation, and how preferences are remembered. They are classified in useful ways. A session cookie lasts until the browser closes; a persistent one has an expiry date. A first-party cookie belongs to the site being visited; a third-party cookie belongs to another domain embedded in the page, which is what allows advertisers to track a user across sites - and what privacy regulation such as the GDPR addresses. A cookie is inert data, not a program, so it cannot itself be a virus.

Answer: C

Correct answer: 128 bits

An IPv6 address is 128 bits, four times the 32 bits of IPv4, which gives \( 2^{128} \) addresses and removes the exhaustion problem that forced the change.

Answer: D

Correct answer: Modem

A LAN needs interface cards, cabling and computers. A modem is for reaching across a telephone line to somewhere else, which is a wide-area connection rather than part of the local network.

Answer: A

Correct answer: Hit

Each matching page a search engine returns is a hit. A link is what a page contains and a blog is a kind of site.