[ECSE]Unit-3.pdfComputer network of interconnected
- 1. Week-7:Computer Networks Prepared by-Ms. Suchi Laad CSE Dept CMRIT 31-10-2023
- 2. AGENDA Introduction to Computer Networks Network Types Internet Sensor Networks Vehicular Networks
- 3. Introduction to Computer Networks Also known as data network, is a collection of interconnected nodes capable of exchanging data. Node – Each station in a communication network is called a node. Components of Computer Network Two or more computers. Cables(coaxial, twisted pair or fiber optic) to link computers. Network Interface Card(NIC) Switches A software called network operating system.
- 4. Advantages of Networks Increased Speed Reduced Cost Improved Security Centralized Software Management Flexible access Disadvantages of Networks High Cost of Installation Requires time for administration Failure of Server
- 5. Network Types A computer network can be classified into four types It is a collection of computers that are linked together in a local area, such as building or office. A LAN connects computers by coaxial cable, twisted pair etc. It is less expensive. LAN offers more security. 1) LAN(Local Area Network)
- 6. A PAN is a network that is set up for a single person for personal usage. Laptops, mobile phones are used to establish a personal area network. There are two types of WAN: Wired personal area network Wireless personal area network Examples are Small Home Office where devices are connected through internet via VPN. 2) PAN(Personal Area Network)
- 7. It is a network that connects many LANs to build a bigger network. Government agencies utilise MAN to communicate with residents and private business. MAN is used in communication between the banks in a city. It can be used in Airline Reservation. It can be used for communication in military. 3) MAN(Metropolitan Area Network)
- 8. A WAN is a network that is expanded to a broad geographical area, such as states or countries. It is connected through telephones lines, and satellite connectivity. It is utilised in business, government, and education. Examples of WAN are Mobile Broadband(4G Network), Private network etc. 4) WAN(Wide Area Network)
- 9. Internet The internet is a vast network that connects computers all over the world. Through Internet, people can share information and communicate from anywhere with an internet connection. It was first created in 1969 by ARPANET.
- 10. Uses of Internet E-mail- It is an electronic message that is delivered from one computer to another through a network. World Wide Web- It is a popular information sharing service on internet. E-commerce- It includes variety of online goods and services having commercial operations.
- 11. Sensor Networks It is a group of sensors where each sensor monitors data in different location and sends it to the central location for storage, viewing and analysis. Applications of Sensor Networks 1) Home Security- The primary goal of home security is to detect an intruder. Examples are glass-break sensor, security cameras, motion detectors. 2) Environmental Monitoring- Researchers, farmers need to moniter aspects of natural environment such as air pollution, soil quality and weather metrices. So instead of manual approach, we use automated sensor network.
- 12. 3) Municipal Surveillance- It is mostly used by Police Officers to check on crimes happening in the city through surveillance cameras. 4) Earthquake Detection- It is the most scientific way to detect earthquake through sensor networks.
- 13. Vehicular Networks 1) It is a wireless network used in vehicles that safety road applications to drivers. 2) It minimises accidents and collision. 3) Advantages of Vehicular Networks are- - Increase comfort - Reduce traffic jams - Decrease travel times - Relieve driver efforts
- 14. Thankyou!