Note for Data Communication and Computer Network - DCCN By Punyatoya Panigrahi. Note for Data Communication and Computer Network - DCCN By vtu rangers. Note for Data Communication and Computer Network - DCCN By Amitabh Sharma. COMPUTER NETWORKS. Lecture Notes. DEPARTMENT OF COMPUTER SCIENCE & ENGINEERING. SHRI VISHNU ENGINEERING COLLEGE FOR WOMEN. Data Communication and Computer Networks Notes file (DCCN pdf Notes) Data Communication and Computer Networks Notes – DCCN.
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DCCN PDF Notes Complete - JNTU Topics Covered - DCCN Pdf notes Complete of JNTU are listed below: Data Communication And. Data communications are the exchange of data between two devices via some form of transmission medium such as a wire cable. For data communications to. DOC/DOC ISBN ISBN-to Publisher: Alan R. Apt. Developmental Editor: Rebecca Olson. Executive.
Periodic Analog Signals.
Digital Signals. Transmission impairment.
Data Rate Limits, Performance. Digital Transmission. Digital-to-Digital Conversion. Analog-to-Digital Conversion, Analog Transmission.
Digital-to-analog Conversion. Bandwidth utilization: Multiplexing and Spreading, Multiplexing.
Spread Spectrum. Transmission Media, Guided media. Circuit-Switched Networks. Dntagram Networks, Virtual-Circuit Networks. Structure of a Switch.
Telephone Networks. Dial-up Modems. Digital Subscriber Line. Cable TV Networks.
Cable TV for data transfer. The transmission medium is the physical path by which a message travels from sender to receiver. A protocol is a set of rules that govern data communications. It represents an agreement between the communicating devices. Without a protocol, two devices may be connected but not communicating. Data Representation Information today comes in different forms such as text, numbers, images, audio, and video.
Text In data communications, text is represented as a bit pattern, a sequence of bits 0s or 1s. Different sets of bit patterns have been designed to represent text symbols.
Each set is called a code, and the process of representing symbols is called coding. Today, the prevalent coding system is called Unicode, which uses 32 bits to represent a symbol or character used in any language in the world. Numbers Numbers are also represented by bit patterns.
However, a code such as ASCII is not used to represent numbers; the number is directly converted to a binary number to simplify mathematical operations.
Images Images are also represented by bit patterns. In its simplest form, an image is composed of a matrix of pixels picture elements , where each pixel is a small dot. The size of the pixel depends on the resolution.
For example, an image can be divided into pixels or 10, pixels. In the second case, there is a better representation of the image better resolution , but more memory is needed to store the image. After an image is divided into pixels, each pixel is assigned a bit pattern. The size and the value of the pattern depend on the image. For an image made of only black- and-white dots e.
There are several methods to represent color images. Congestion Control and Quality of Service. Congestion, Congestion Control, Two Examples. Quality Service. Techniques to improve QoS. Integrated Services, Differentiated Services. Name Space. Domain Narnespace, Distribution of Name Space.
Encapsulation, Rmote Logging. Electronic Mail and File Transfer. Remote Logging. Voice over IP. Computer Networks. Introduction to Data communications and Networking. Pearson education. Hura and M.
Singhal,CRC Press. Taylor and Francis Group. Keshav,2nd Edition,Pearson Education. Understanding communications and Networks.