Unit 5 DATA COMMUNICATION AND COMPUTER NETWORKS

Data Communication:

Components of a Data Communication System FREE

Simplex FREE

Half Duplex and Duplex Modes of Communication

Analog and Digital Signals

Noiseless and Noisy Channels

Bandwidth

Throughput and Latency

Digital and Analog Transmission

Data Encoding and Modulation Techniques

Broadband and Baseband Transmission

Multiplexing, Transmission Media

Transmission Errors

Error Handling Mechanisms

Computer Networks

Network Topologies

Local Area Networks

Metropolitan Area Networks

Wide Area Network

Wireless Networks

Internet

Network Models:

Layered Architecture

OSI Reference Model and its Protocols

TCP/IP Protocol Suite

Physical

Logical

Port and Specific Addresses

Switching Techniques

Functions of OSI and TCP/IP Layers:

Framing

Error Detection and Correction

Flow and Error Control

Sliding Window Protocol

HDLC

Multiple Access – CSMA/CD

CSMA/CA

Reservation

Polling

Token Passing

FDMA

CDMA

TDMA

Network Devices

Backbone Networks

Virtual LANs

World Wide Web (WWW):

Uniform Resource Locator (URL)

Domain Name Service(DNS)

Mapping Names to Addresses and Addresses to Names

ElectronicMail Architecture

SMTP

POP and IMAP

TELNET and FTP

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