Lesson 2 : AN OVERVIEW TO COMPUTER NETWORKS Flashcards
Types of Servers
File Server
Printer Server
Application Server
Message Server
Database Server
These servers provide the services for storing, retrieving and moving the data. A user can read, write, exchange and manage the files with the help of file servers.
File Server
Server used for controlling and managing printing on the network. It also offers the fax service to the network users.
Printer Server
The expensive software and additional
computing power can be shared by the computers in a network with he help of application servers.
Application Server
It is used to co-ordinate the interaction between users, documents and applications. The data can be used in the for of audio, video, binary, text or graphics.
Message Server
It is a type of application server
Database Server
Benefits of Computer Network
Increased speed
Reduced cost
Improved security
Centralized software managements
Electronic mail
Flexible access
Disadvantages of Computer Networks
High cost of installation
Requires time for administration
Failure of server
Cable faults
A system containing any combination of computers, computer terminals, printers, audio or visual display devices, or telephones interconnected by telecommunication equipment or cables.
Computer Network
types of computer networking
LAN - Local Area Network
WAN - Wide Area Network
WLAN - Wireless Local Area Network
PAN - Personal Area Network
SAN - Storage Area Network
GAN - Global Area Network
MAN - Metropolitan Area Network
CAN - Controller Area Network
DAN - Desk Area Network
VPN - Virtual Private Network
Network Classification By Their Component Role
Peer To Peer Network
Client/Server Network
Each computer is responsible for making its own resources available to other computers on the network.
Each computer is responsible for setting up and maintaining its own security
for these resources.
Each computer can function as both client and server.
Peer To Peer Network
Computers act as server and other act as clients.
Based on Local area network(LAN)
Defined by the presence of servers on a
network that provide security and administration of the network.
Client/Server Network
The computer running a program that
requests the service from a server.
Client
Simply a computer, that available
the network resources and provides service to other computers when
they request it.
Server
