Computer Internet Questions and Answers

Answer: C

Correct answer: Local area network

LAN stands for Local Area Network - a network confined to one site, such as a building or a campus.

Answer: C

Correct answer: @

The @ sign separates the user name from the domain of the mail host: user@example.com. It was chosen precisely because it appeared in no name.

Answer: D

Correct answer: It protects against virus

A firewall controls which connections may cross a boundary, and it can log that traffic and enforce policy. It does not inspect the contents of files for malicious code, which is what antivirus software is for - so protection against viruses is the benefit it does not provide.

Answer: A

Correct answer: Instanoles

Chat, electronic mail and instant messaging are all real means of personal communication over the internet. Instanoles is not a service at all, which is what makes it the answer.

Answer: B

Correct answer: Server

A machine that makes its resources available to others is acting as a server; the machines using them are clients. In a peer-to-peer network every machine does both at once.

Answer: D

Correct answer: is a grid organized in columns and rows

A table is by definition a grid of rows and columns. The other three statements are true of tables but describe what can be done with one rather than what it is.

Answer: A

Correct answer: ASCII

ASCII assigns a number to each character, and because almost every system uses it, plain ASCII text is the lowest common denominator for exchanging data. HTML and XML are markup languages built on top of a character encoding rather than encodings themselves.

Answer: B

Correct answer: It is usually the address of the router acting as the gateway

On a home network the address ending .1 is conventionally assigned to the router, which acts as the default gateway - the device that traffic destined for anywhere outside the local network is sent to. It is also the address typed into a browser to reach the router’s configuration page. The convention is not a rule; nothing forbids the router taking a different address, and some manufacturers use 192.168.1.254. The 192.168 range is one of the private address blocks reserved for local networks, along with 10.x.x.x and 172.16 to 172.31. These addresses are not routable on the public internet and are reused in millions of homes, which works because the router performs NAT, translating them to its single public address on the way out. The broadcast address is the last in a subnet, not the first, and the network address itself ends in .0.

Answer: C

Correct answer: It should be deleted without opening it

An unexpected message from an unknown sender may carry malware in its attachment or a link to a fraudulent site, and replying at all confirms that the address is live. Deleting it unopened is the only response that gives the sender nothing.

Answer: D

Correct answer: Internet protocol

IP stands for Internet Protocol, and an IP address is the number that identifies a host within it.