23-12-2017, 04:16 PM
TRANSLATORS
*Translators are programs used to convert a program written in other languages to machine language.
Eg. Assembler, Compiler, Interpreter
Assembler
*Assembler convert assembly language program into machine language programs.
Compiler and Interpreter
*Compiler and interpreter convert program written in high level language into machine language before execution at a time.
*Compiler takes entire program as input at a time and convert into machine language eg: C Compiler
*Interpreter takes single instruction at a time as input and convert into machine language, eg: BASIC
Note the point
*Interpreter is a line -by line traslator.
COMPUTER NETWORKS
*In a computer network computers are connected to each other for communication
Note the Point
*Data transmission rate of communication channel is usually measured in
Ans : Bits per Second
LAN-MAN-WAN
*Three types of basic computer Networks are LAN,MAN and WAN
*LAN (Local Area Network) is the network that is usually used inside an office building or inside a class room
*Most common technologies currently used to build LAN - Ethernet and WiFi
*MAN (Metropolitan Area Network) is a network that spread over a city.
*Network used in cable TV connection is MAN.
*WAN (Wide Area Network) spans a relatively large geographical area. WAN interconnects countries.
*Biggest wide area network is internet.
*Personal Area Network (PAN) is a communication network connecting personal devices.
Knowledge +
*The first person who proposed the development of a global network of a computer
Ans : J.C.R. Licklider
INTERNET
*Several thousands of individual computer networks are interconnected to form the internet.
*It is a world wide network of computer.
*Internet protocol suit is commonly known as
Ans : TCP/IP
*The communication protocol of internet is
Ans : TCP/IP
*TCP
Ans : Transmission Control Protocol
*IP
Ans : Internet Protocol
*TCP/IP came into being in the year
Ans : 1982
*Number of layers in TCP/IP Model
Ans : 4
*Number of layers m, the OSI Model
Ans : 7
*Routers operate in which layer of OSI reference model
Ans : Network layer
*The network which is known as International network
Ans : Internet
*The network which is considered as the ancient form of internet
Ans : ARPANET
*ARPANET was developed by
Ans : American Department of Defence
*Internet in India was started by
Ans : VSNL (Videsh Sanchar Nigam Limited)
*Commonly used Internet access methods are
Ans : Dial-up, ISDN, DSL, Cable Modem
*Websites which help us to upload videos
Ans : YouTube, Yahoo Video, My video
*What is backup?
(a)Adding more components to your network
(b)Protecting data by copying it from the original source to a different destination
(c ) Filtering old data from new data (d) Accessing data on tape
Ans : (b)
Intranet and Extranet
*Technology used in intranet to share information, hardware and other resources is
Ans : Internet Protocol Technology
*Intranet is a network of computers within an organization which follows the same protocol as the internet and provides the same service as the internet.
*Extranet is a closed online connection of two or more organisation
*Internal network which is designed to provide & disseminate information to internal staff by using the look and feel of the World Wide Web
Ans : Intranet
