Media Of Communication Part 1

-
 Media Of Communication

Communication Channel:-Medium of communication can broadly categorized into two types:-
 1.Guided Media: - Guided media are those, which provide a physical connection from one device to another device. Like:-(a)Ethernet Cable: - Ethernet is a data link technology used in local Area network. Such cable can transmit data speed of 100-1000 mbps.
.Ethernet Cable was invented by an electrical Engineer of U.S. named Robert Metcalf.
.Ethernet Cable connected to Ethernet port with the help of “RJ45” socket.

Ethernet Cable can be categorized into:-
 1.Straight through Ethernet Cable:- It is used to connect different devices.
Like:- Computer to hub
       Computer to switch
       Computer to router
It has same order of color form left to right.


2.Ethernet Crossover Cable:- It is used to connect same device.
Like:- computer to computer
        Router to router 
        Hub to hub
In the cable inside the main covering 1st with 3rd and 2nd with 6th wire crossed from left

   (b)Co-axial Cable:- It acts as an efficient electrical transmission media. It consist of a single line of conductor surrounded by insulator layer and a conductive shield over it.

  •   It can transmit upto 100 mbps.
  •   It is used by the Cable T.V. operator.



 (c)Fiber optics:- Fiber optic cable is made fine stands of silicon glass fiber and is coated with a refractive surface. Data are transferred through electromagnetic waves.

  •  It can support over 30,000 telephone lines at a time. Transmission rate upto 10Gbps.

Comments

Post a Comment

Popular posts from this blog

Computer Basic

-
  The word “computer” comes from the word “compute”, which means to calculate”. Charles Babbage is known as the ' Father of computer' .  A computer often referred to as a “data processor” because it can store, process, and retrieve data whenever desired.  The activity of processing data using a computer is called data processing.    Data processing consists of three sub activities:- (1)          Capturing input data (2)          Manipulating the data and (3)          Managing output results. Data : - Data is raw material used as input to data processing. Data can be anything like numerical, non-numerical or a mixture of both. Information : - Information is processed data obtained as output of data processing. Computer: - A computer is an electronic device which performs numerical calculation and logical calculation at hig...
Read more

Character Set and Tokens in Python

-
Image
  Character Set : Character Set in Python consist of  valid characters such as alphabets, digits or special characters that are recognized by the library of Python Language. Alphabets:                         A,B,......Y,Z or a,b,.......y,z. Digits:                               0,1,2,3,4,5,6,7,8,9 Special Character:      ~!@#$%^&*()_+{}[];:'"\,./<> etc. White spaces    :             Blank space, new line, etc. Token: The smallest individual unit in a program is referred as 'Token'. It is also called Lexical Element or Lexical Unit. It can be categorized as: 1. Keywords : Keywords are the reserved words that has specific function in a program. These words are used while writing program to get desired output. The keywords are executed  as its purp...
Read more

DATABASE INTRODUCTION

-
Database : A database is an organized collection of related information in which facts are properly arranged and stored.  A database is made up of a basic unit called “Table”.  A table is made of different ‘Fields’ and ‘Records’.  Record : Collection of organized data or related facts is called Record.  Field : A field is a collection of same data types.  DBMS (Database Management System): A database Management System is a tool for managing and manipulating information of a database.  The main Functions of a DBMS is:  Creating Database.   Adding Records.  Modifying Records.  Displaying Records.   Storing Records.   Deleting Records.   Generating Reports.   Printing Reports.  Some Example of DBMS: MS Access, My-SQL,etc.  Features of DBMS: DBMS ensures data security. DBMS facilitates the sharing of data among different database. DBMS controls data inconsistency to a large extent. DBMS...
Read more