I do not have any questions. This document provided an overview of computer networks including basic concepts, goals, history, definitions, applications, hardware, software and cables.

1. Computer Networks
1st Class
Lesson Title
Introduction to Computer Networks:
Basic concept of Computer networks
Goals of networking
Pranab Bandhu Nath
Senior Lecturer
CSE Department
City University, Dhaka
E-mail: bandhutuhin@gmail.com
web: www.ictdictionary.com
Facebook Page: facebook.com/bandhutuhin
YouTube: www.youtube.com/bandhutuhin

2. Computer Networks Syllabus
• Please Follow the Course Outline. Here I will show you the advanced network syllabus as
well. By following this course outline you can work professionally in any Networking
industries.
• Physical Layer- Cables, topology, Transmission modes, Encoding, Lan, Devices, Modulation
• Data Link – Mac Protocols, Switches, Ethernet frame, Error Control Stop and wait, Go Back
and selective Repeat.
• Network- IPV4, IPV6,IP Addressing, Routing Protocols, IPV4 and IPV6 Header,
• Transport- UDP, Headers, TCP
• Session
• Presentation
• Application
• Network Security

3. Computer Network History
18th Centuries: Watt's Steam Engine.
Optical Telegraph. ...
The Lightning Rod.
19th Centuries: Telegraph – 1837,Telephone - 1876.
Electric Battery - 1800.Camera – 1888
Typewriter - 1867.
20th Centuries:
Radio ,Television,
The Personal Computer.
Information Gathering, Processing and Distribution
21st Centuries: Satellites, Fiber Optics, Internet

4. What is Computer Network?
• A computer network is a set of computers connected together for
the purpose of sharing resources. The most common resource shared
today is connection to the Internet. Other shared resources can
include a printer or a file server. The Internet itself can be considered
a computer network

5. Goals of Computer Network
• Sharing Resources from one Computer to another Computer over a
network
• Performance by measuring the speed of data transmission with
number of users, connectivity and the software used
• Reliability makes easy to use an alternative source for data
communication in case of hardware failure or connectivity issues
• Scalability increases the system performance by adding more
processors
• Security is the main characteristics of Computer network where you
can take necessary steps for protecting your data from unauthorized access

6. Application of Computer Network
• Business Applications
• Communication Medium
• e-commerce
• Home Applications
• Electronic commerce
• Mobile Users

7. Network Hardware & Software
• There are two component of Computer Network
•
1. Hardware Equipment
2. Software
3. Cables and Connectors
Hardware: NIC, Server, Client, Peers, Transmission, Medium, Router,
Bridge, Hub, Switches, Gateway, Repeaters
Software: Network Operating System, Protocols Switches (TCP/IP, OSI)
Cables and Connectors: Twisted pair cable
Coaxial cable
Fiber-optic cable

8. "Do you have any questions?"