(1) what is a computer network?
(2) what is internet?
(3) what is protocol? which set of protocols is used by the internet?
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Answers
COMPUTER NETWORK
A computer network, also referred to as a data network, is a series of interconnected nodes that can transmit, receive and exchange data, voice and video traffic. Network devices use a variety of protocols and algorithms to specify exactly how endpoints should transmit and receive data. For example, the Ethernet standard establishes a common language for wired networks to communicate, and the 802.11 standard does the same for wireless local area networks (WLANs).
INTERNET
Internet is a global system of interconnected computer networks that use the standard Internet protocol suite (often called TCP/IP, although not all protocols use TCP) to serve billions of users worldwide. It is a network of networks that consists of millions of private, public, academic, business, and government networks, of local to global scope, that are linked by a broad array of electronic, wireless and optical networking technologies. The Internet carries an extensive range of information resources and services, such as the inter-linked hypertext documents of the World Wide Web (WWW) and the infrastructure to support email.
PROTOCOL
Sometimes referred to as an access method, a protocol is a standard used to define a method of exchanging data over a computer network, such as local area network, Internet, Intranet, etc. Each protocol has its own method of how data is formatted when sent and what to do with it once received, how that data is compressed, or how to check for errors in the data.Protocol can also be told as "set of rules implement to protect the network"
protocols is used by the internet
FTP - File Transfer Protocol
HTTP - Hyper Text Transfer Protocol
HTTPS - Hyper Text Transfer Protocol Secure
TCP/IP - Transmission Control Protocol/Internet Protocol
ARP - Address Resolution Protocol
DHCP - Dynamic Host Configuration Protocol
DNS - Domain Name System
ICMP - Internet Control Message Protocol
TFTP - Trivial File Transfer Protocol
UDP - User Datagram Protocol
SMTP - Simple Mail Transfer Protocol
RTP - Real-time Transport Protocol
VoIP - Voice over Internet Protocol
NTP - Network Time Protocol
IGMP - Internet Group Management Protocol
IMAP4 - Internet Message Access Protocol version 4
Answer:
1. A computer network is a set of computers connected together for the purpose of sharing resources.
2. A global computer network providing a variety of information and communication facilities, consisting of interconnected networks using standardized communication protocols.
3. A protocol is a system of rules that allows two or more entities of a communications system to transmit information via any kind of variation of a physical quantity.
IMAP, HTTP, TCP, SNMP protocols used by internet.