What is Communication Technology in Computer Network?
In Communication Technology data
transmission in general speaking is a kind of sending information from one
place to another. In recent computer term, it means sending a stream of bits or
bytes from one location to other using latest technologies available. Among
them is CD, copper wire, optical fiber, laser, radio, and infrared link or
Bluetooth link.
The data transmission technology is further categorized into two types:
1) Wired Technology
2) Wireless
Technology
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What is Wired Technology in Computer Network?
Wired Technology is a method where, the data is send from one place to another through wires. Wires are used to bear mechanical loads and to carry electricity and telecommunications signals. The best example where data transmission is done through wire is cable network and in telephones. There are some specific cables used for the transmission of data on computer like co-axial cable, Ethernet cable, fiber optic etc.
What is Wireless Technology in Computer Network?
Wireless Technology is a method of communication that uses low-powered radio waves to transmit data between devices. The term refers to communication without cable. There are many wireless medium provided to send the data from one place to another, which depends upon the distance of data transmission along with the speed.
Explain different types of Wired Communication Medium in Computer Network?
Following are the physical communication medium, which are used to transfer the data from one place to another.
1) Co-axial Cable
2) Ethernet Cable
3) Fiber Optic
1) Co-axial Cable:
If you need to bring a TV signal from an antenna into your house; set up a computer network in your home, chances are you will be working with coaxial cable. It is consists of copper wire surrounded by insulating material, which is in turn surrounded by an outer conductor of braided wire, enclosed in an outer jacket of insulation. The outer plastic shield minimizes electrical and radio frequency interference.
2) Ethernet Cable:
Another type of media used to transfer data from one place to another is Ethernet Cable. Ethernet cables are also called Cat 5 cables. They will look like a large phone or modem cable.
3) Fiber Optic:
An optical
fiber is a transparent then usually made of glass or plastic, for transmitting
light. The fiber consists of a core surrounded by a cladding layer. Glass optical
fiber is from silica. The optical fiber can be used as a medium for telecommunication
and networking because it is flexible and can be bundled as cables.
Chapter 1 – Digital Documentation
Chapter 2– Electronic Spreadsheet
Chapter 3 – Database Management System
Chapter 4 –Web Application
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Explain different types of Wireless Communication Medium in Computer Network?
The wireless communication medium is further categorized into two types.
Short Range Communication
1) Infra Red
2) Bluetooth
Long Range Communication
1) Radio Link
2) Microwave Link
3) Satellite Link
1) Infra Red:
Infrared waves are used for short-range communication i.e. communication between devices, which are not very far from each. Infrared uses pulses of non-visible light communication between two devices, such as a remote control to a television or DVD player.
2) Bluetooth:
Bluetooth is the name of a wireless technology used for connecting devices set to replace cables. It uses radio frequencies to transmit information over short distances of generally 33 feet (10 meters) or less. With embedded Bluetooth technology all sort of devices including smart phones, handsets and earpieces, digital cameras and computers, can easily communicate with each other without cables.
Chapter 1 – Digital Documentation
Chapter 2– Electronic Spreadsheet
Chapter 3 – Database Management System
Chapter 4 –Web Application
3) Radio Link:
Another medium for data transmission is through radio waves. Radio waves can travel long distance in all direction and they can easily pass through any obstacle, like a wall or building so they can be used for indoor as well as outdoor communication.
4) Microwave Link:
Microwave communication is used for long-distance telephonic communication smart phone communication etc. Microwave travel in a straight line and unlike radio waves, microwaves does not pass through obstacles well.
5) Satellite Link:
Satellite communication in particular is becoming increasingly important in connecting the global community to the internet. Satellite communication is especially used for that remote location, which are difficult to reach with a traditional wired infrastructure. Satellite communication is cheaper and economical as compared to other wired communication system. A common example where satellite communication is used in your cable television network and that is why channels like Sony or Zee networks can be viewed by people living in US or UK.
How Data transfer on a Network?
Switching techniques are used for transmitting data across networks. Different types of switching techniques are employed to provide communication between two computers on a Network
1) Circuit Switching:
It is a method of implementing a telecommunication network in which two network nodes establish a dedicated physical communication circuit, before sending a message. The main advantage of circuit switching is guaranteed delivery of message.
The early analog telephone network is the main example of circuit switching network.
2) Message Switching:
In this network switching technique message is routed entirely from the source node to the destination node. In this technique no physical circuit is established between two computers on a network. if the entire circuits are engaged, the message switched network stores the message until the network circuits become available for message transfer.
3) Packet Switching:
In packet base network, the message gets broken down into small packets with unique ID. These packets travel from different available circuits on network from source to destination. After reaching at destination packets reassembles according to their unique IDs and again turns into a message.
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