The OSI Model
There are n numbers of users who use computer network and are located over the world. So to ensure, national and worldwide data communication, systems must be developed which are compatible to…
Reference Models in Communication Networks
The most important reference models are : 1. OSI reference model. 2. TCP/IP reference model. Introduction to ISO-OSI Model There are many users who use computer network and are located all over…
Connection Oriented and Connectionless Services
These are the two services given by the layers to layers above them. These services are: 1. Connection Oriented Service 2. Connectionless Services Connection Oriented Services There is a sequence of operation…
Types of Communication Networks
Communication Networks can be of following 5 types: 1. Local Area Network (LAN) 2. Metropolitan Area Network (MAN) 3. Wide Area Network (WAN) 4. Wireless 5. Inter Network (Internet) Local Area Network (LAN) It is…
UnBounded or UnGuided Transmission Media
Unguided medium transport electromagnetic waves without using a physical conductor. This type of communication is often referred to as wireless communication. Signals are normally broadcast through free space and thus…
Fiber Optic Cable
A fibre-optic cable is made of glass or plastic and transmits signals in the form of light. For better understanding we first need to explore several aspects of the nature of…
Coaxial Cable
Coaxial is called by this name because it contains two conductors that are parallel to each other. Copper is used in this as centre conductor which can be a solid…
Twisted Pair Cable
This cable is the most commonly used and is cheaper than others. It is lightweight, cheap, can be installed easily, and they support many different types of network. Some important…
Transmission Mediums in Computer Networks
Data is represented by computers and other telecommunication devices using signals. Signals are transmitted in the form of electromagnetic energy from one device to another. Electromagnetic signals travel through vacuum,…
Transmission Modes in Computer Networks
Transmission mode refers to the mechanism of transferring of data between two devices connected over a network. It is also called Communication Mode. These modes direct the direction of flow of…
