Computer Networks- 1st Lesson
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- Computer networks allow for resource sharing, high reliability, and flexible access across connected devices through hardware like routers and switches, transmission media, and network protocols.
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Various devices in computer networks lesson 6PranabBandhuNath This document discusses different data transmission modes and network devices. It introduces simplex, half duplex, and full duplex transmission modes. It also lists 10 common network devices including cables, repeaters, hubs, bridges, switches, routers, gateways, intrusion detection systems, firewalls, and modems. The document aims to provide information on computer networks and invites the reader to ask any questions.
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Data transmission mode lesson 5 PranabBandhuNath Simplex, half duplex, and full duplex are three types of data transmission modes in computer networks. Simplex mode allows data transmission in one direction only, half duplex allows data flow in two directions but only one direction at a time, and full duplex allows simultaneous two-way transmission between two nodes. The document provides an overview of different transmission modes in computer networks for educational purposes.
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- 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?"