Skip to main content

Transmission Media


Transmission media means to send the data from one place to another place through some medium like wire or wireless. The transmission media or medium can be classified into two categories Wired Transmission Media and Wireless Transmission Media.

Wired Transmission Media
Wired transmission media or medium uses wires or cables to transmit data from one place to another place. In this type of medium we use wires or cables. The data is transferred in the form of electrical or light signal. There are various types of cables that can be used for setting up a network. Some of them are as follows:
Twisted pair cable was invented by Alexander Graham Bell in 1881. It is the most widely used medium for telecommunication. It consists of copper wires that are twisted into pairs. An ordinary telephone wire consists of two insulated copper wires twisted into pairs. Computer networking cables consists of four pair of copper wire that can be utilized for both voice and data transmission.
Twisted pair cables are of two types – Shielded Twisted Pair (STP) and Unshielded Twisted Pair (UTP). This UTP cable is mostly used in computer networking.


STP

UTP
Coaxial Cable

Coaxial cable was invented by an English engineer and mathematician, Oliver Heaviside, in 1880. The cable consists of a copper or aluminium wire wrapped with an insulating layer of a flexible material. The insulating layer is surrounded by a conductive layer called shield, which is finally covered with a thin insulating layer on the outside.
Fibre Optic Cable
The Optical Fibre or Fibre Optic cable consists of a central glass core, surrounded by several layers of protective materials. Optical fibre cable has the ability to transmit signals over much longer distances than twisted pair and coaxial cable. It also transfers data much faster than the two cables. Because of these optical fibre networks we can use the internet at much faster speed. If optical cable would not be there then we might face lot of issue in video conferencing, online gaming, etc.
Podcast Link: Click Here
YouTube Video Link: Click Here
Labels:

Comments

Post a Comment

Students you can ask your doubts in comment section

Popular posts from this blog

Bit by Bit | Chapter 6 - Graphics and Sound in QB64 | QBasic | Class 7 CBSE | Computer Application

Bit by Bit | Chapter 6 - Graphics and Sound in QB64 A. Tick the correct option. 1. (d) screen mode 0 2. (b) 640 x 350 3. (d) White 4. (a) Lower-Right 5. (c) PSET 6. (c) Generate a tone for a short duration B. Fill in the blanks. 1. CIRCLE 2. PAINT 3. PLAY 4. Graphic 5. Pixels 6. Box C. True or False. 1. True 2. False 3. False 4. True 5. True 6. True D. Answer the following questions. 1. What is the use of SCREEN statement? The SCREEN statement is used to set the screen mode for displaying graphics. There are many screen modes and each screen modes have their own number which is from SCREEN 1 to SCREEN 13. The various screen modes differ in resolution. 2. What is a pixel? How is it related to resolution? The graphics which is displaying on the computer screen is made up of thousands of dots called pixel. Pixel stands for picture element. The number of pixels in an image determines the resolution of the image. Higher the resolution, cleaner the image will appear. 3. What is the differenc...
Post a Comment
Read more

Q & A Chapter 1 | Internet Basics | Class 10 CBSE | Computer Application

 Q & A of Chapter 1 Internet Basics A. Tick the correct options – 1. (b) TCP/IP 2. (a) Internet Service Provider 3. (a) URL 4. (b) HTTP 5. (a) Bridge 6. (a) home page 7. (d) All of these 8. (b) Domain Naming System 9. (b) Rules 10. (d) ARPANET B. Very Short Answer Type Questions – 1. In the URL http://www.myfirm.co.in/about.html , what do the following components depict? (a) http                                                 (b) in (a) Http represents a type of server and the protocol on the Internet (b) ‘in’ represents the domain extension of the website. 2. In the URL http://www.favmusic.com/contactus.html what does www.favmusic stand for? www.favmusic represents the domain name i.e. favmusic in www. 3. W...
Post a Comment
Read more

Bit by Bit | Chapter 3 Working with Queries, Forms and Reports | Class 8 CBSE | Computer Application

Working with Queries, Forms and Reports Exercise Solution A. Tick the correct option – 1. (d) Datasheet View 2. (c) Three 3. (c) Four 4. (b) Datasheet View 5. (d) Filter 6. (b) Create B. Fill in the blanks – 1. Query 2. Form 3. Objects 4. Design 5. Report 6. Result C. State True or False – 1. T 2. F 3. T 4. T 5. F 6. T D. Answer the following questions – 1. What is Query? A query is a method of getting answers to questions on data. It is used to retrieve selective data satisfying specific criteria. 2. Differentiate between Form and Report. Forms allow you to add and update data in a table, one record at a time, while reports are an effective way to present data in printed format. You can customize the appearance of tabular data on a report. 3. How can you specify multiple conditions while designing a query? Specifying the condition in the Criteria row for more than one field will result in a query that will select only those records...
Post a Comment
Read more