Computer Network
A computer network is a system connected by several computers to share information and resources. Connections between computers can be established through either wired or wireless media. The best-known example of a computer network is the Internet.
Networks can be connected using routers, switches, hubs, modems, and network protocols such as TCP/IP, DNS, DHCP, and HTTP. Networks are usually connected using TCP/IP, DNS, DHCP, and HTTP networking protocols.
Types of Computer Networks
- Local Area Network (LAN)
- Metropolitan Area Network (MAN)
- Wide Area Network (WAN)
Local Area Network (LAN):- It is a network of computers that operates in a very small geographic area up to 5-6 kilometers. It is used to connect devices in a single office, building, or campus. A Local Area Network (LAN) allows computers to communicate and share resources. It is used to interconnect devices in a networked environment.
Metropolitan Area Network (MAN):- It is a network of computers that interconnects users with computer resources in a geographic area more significant than that covered by even a LAN but smaller than the area covered by a WAN. It may be a single network, such as a cable TV network covering an entire city or a group of several LANs. It may be used to share the resources between two or more LANs. E.g.:- Cable TV network and Telephone Company.
Wide Area Network (WAN):- WAN is a computer network covering a large geographic area such as a country, continent, or even the whole world to share data and resources. It contains several LANs and MANs. WANs provide interconnectivity without any distance limit. The Internet is an example of the world’s biggest WAN.
Personal Area Network (PAN): A PAN is a network of computers that interconnects personal devices, such as smartphones, laptops, and tablets, to each other within a small area.
In conclusion, computer networks have become essential in today’s digital world. From small businesses to large corporations, computer networks facilitate communication, resource sharing, and data sharing. By understanding the different types of computer networks and their importance, individuals and organizations can make the most of this technology and stay ahead in today’s fast-paced digital world.
Importance of Computer Networks
Communication: Computer networks allow people to communicate with each other, regardless of their physical location. It has led to the rise of remote work and telecommuting, which have become increasingly popular in recent years.
Resource Sharing: Computer networks allow devices like printers, files, and internet connections to share resources. It can reduce costs and increase efficiency within organizations.
Data Sharing: Computer networks allow for easy data sharing among devices. It can be particularly useful in industries such as healthcare and finance, where the sharing of sensitive information is essential.
Access to Information: Computer networks provide access to a vast amount of information, which can be particularly useful for research and education.
Write a short note on Repeater and Hub.
A repeater is an electronic device used to regenerate transmissions by amplifying them and then retransmitting signals in the same form they were received. It increases signal strength, allowing data to travel longer distances, thus providing a wider coverage area. In addition to improving radio and wireless communications, repeaters are also used for Ethernet networks such as Wi-Fi and mobile data installations.
A hub is a network device that connects multiple computers and allows them to communicate with each other. It shares data, media, and peripheral devices such as printers or scanners. It creates a central node on the same physical wire or wireless that everyone can access through their browser or applications. It also increases security by filtering out malicious traffic and aids in managing vast networks efficiently.
