Network Components

Question 1

Server

Answer 1

A server is a computer or device on a network that manages network resources. Servers are often dedicated, meaning that they perform no other tasks besides their server tasks.

Question 2

Network interface card (NIC)

Answer 2

A network interface card (NIC)is an expansion board you insert into a computer to connected to a network.

Question 3

Modem

Answer 3

A modem (modulator-demodulator) is a device or program that enables a computer to transmit data over, for example, telephone or cable lines.

Question 4

ADSL

Answer 4

Asymmetric digital subscriber line (ADSL) is a type of DSL broadband communications technology used for connecting to the Internet. ADSL allows more data to be sent over existing copper telephone lines.

Question 5

Encryption

Answer 5

The translation of data into a secret code. Encryption is the most effective way to achieve data security.

Question 6

HTTP

Answer 6

Short for HyperText Transfer Protocol, HTTP is the underlying protocol used by the World Wide Web to define how messages are formatted and transmitted.

Question 7

WAP

Answer 7

WAP gateway is a software system that helps WAP-enabled wireless devices to communicate to Internet Web sites and applications. Web sites deliver pages in special format called Wireless Markup Language (WML) that is compiled and forwarded by the WAP gateway.

Question 8

Client

Answer 8

Typically, a client is an application that runs on a personal computer or workstation and relies on a server to perform some operations.

Question 9

Router

Answer 9

A device that forwards data packets along networks. A router is connected to at least two networks and are located at gateways.

Question 10

LAN

Answer 10

A network is a group of two or more computer systems linked together. Computers on a network are sometimes called nodes. Computers and devices that allocate resources for a network are called servers.

Question 11

TCP/IP

Answer 11

Transmission Control Protocol/Internet Protocol (TCP/IP) is the suite of communications protocols used to connect hosts on the Internet.

Question 12

Private key

Answer 12

a cryptographic key that can be obtained and used by anyone to encrypt messages intended for a particular recipient, such that the encrypted messages can be deciphered only by using a second key that is known only to the recipient

Question 13

HTTPS

Answer 13

An extension to the HTTP protocol to support sending data securely over the World Wide Web. Not all Web browsers and servers support S-HTTP.

Question 14

3G

Answer 14

3G is an ITU specification for the third generation of mobile communications technology.

Question 15

4G

Answer 15

4G is an ITU specification that is currently being developed for broadband mobile capabilities.

Question 16

Ethernet cable

Answer 16

An Ethernet cable is one of the most popular forms of network cable used on wired networks. Ethernet cables connect devices together within a local area network, like PCs, routers, and switches.

Question 17

Switch

Answer 17

In networks, a device that filters and forwards packets between LAN segments.

Question 18

WAN

Answer 18

WAN stands for wide-area network.

Question 19

Firewall

Answer 19

A firewall is a security system designed to prevent unauthorized access on a private network. Firewalls can be implemented as hardware or software.

Question 20

Public key

Answer 20

Public-key encryption is a cryptographic system that uses two keys: A public key known to everyone and a private key known only to the recipient.

Question 21

SMTP

Answer 21

A protocol for sending e-mail messages between servers. Most email systems that use the Internet use SMTP to send messages from one server to another.

Question 22

Wireless

Answer 22

Any computer network where there is no physical wired connection between sender and receiver. Radio waves and/or microwaves maintain the communications.