Computer networks refer to the interconnected system of computers and other network devices that enable the sharing of resources and information. Computer networks can be categorized based on their geographical scope, such as local area networks (LANs), wide area networks (WANs), and metropolitan area networks (MANs).
There are several types of computer networks, including wired and wireless networks. Wired networks use physical cables to connect devices, while wireless networks use radio waves to transmit data between devices.
Computer networks rely on various protocols to ensure efficient communication between devices. Some of the commonly used protocols include TCP/IP, HTTP, FTP, SMTP, and DNS.
The benefits of computer networks include resource sharing, improved communication, remote access to resources, increased productivity, and cost savings. However, computer networks also pose security risks and require careful management and maintenance to ensure their continued performance and security.
Here are some multiple-choice questions about computer network
1. What is a computer network?
a) A group of interconnected computers
b) A single computer
c) A printer
d) A scanner
2. What is the maximum size of an IPv4 address?
a) 16 bits
b) 32 bits
c) 64 bits
d) 128 bits
3. Which protocol is used for sending email?
a) HTTP
b) SMTP
c) FTP
d) DNS
4. Which layer of the OSI model is responsible for establishing, maintaining, and terminating connections between applications?
a) Physical layer
b) Data Link layer
c) Transport layer
d) Application layer
5. What is a router?
a) A device that connects computers to the internet
b) A device that connects multiple networks
c) A device that connects printers to computers
d) A device that connects scanners to computers
