Network Components Flashcards
Server
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.
Network interface card (NIC)
A network interface card (NIC)is an expansion board you insert into a computer to connected to a network.
Modem
A modem (modulator-demodulator) is a device or program that enables a computer to transmit data over, for example, telephone or cable lines.
ADSL
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.
Encryption
The translation of data into a secret code. Encryption is the most effective way to achieve data security.
HTTP
Short for HyperText Transfer Protocol, HTTP is the underlying protocol used by the World Wide Web to define how messages are formatted and transmitted.
WAP
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.
Client
Typically, a client is an application that runs on a personal computer or workstation and relies on a server to perform some operations.
Router
A device that forwards data packets along networks. A router is connected to at least two networks and are located at gateways.
LAN
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.
TCP/IP
Transmission Control Protocol/Internet Protocol (TCP/IP) is the suite of communications protocols used to connect hosts on the Internet.
Private key
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
HTTPS
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.
3G
3G is an ITU specification for the third generation of mobile communications technology.
4G
4G is an ITU specification that is currently being developed for broadband mobile capabilities.
Ethernet cable
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.
Switch
In networks, a device that filters and forwards packets between LAN segments.
WAN
WAN stands for wide-area network.
Firewall
A firewall is a security system designed to prevent unauthorized access on a private network. Firewalls can be implemented as hardware or software.
Public key
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.
SMTP
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.
Wireless
Any computer network where there is no physical wired connection between sender and receiver. Radio waves and/or microwaves maintain the communications.
