TCP/IP quick introduction

TCP/IP quickly understands that TCP/IP is a communication protocol for the Internet. Computer Communication Protocols are descriptions of the rules that computers must comply with in order to communicate with each other. What is TCP/IP? TCP/IP is a communication protocol for computers connected to the Internet. TCP/IP refers to the Transmission Control Protocol/Internet Protocol (Transmission Control Protocol/Internet Protocol ). TCP/IP defines how electronic devices (such as computers) connect to the Internet and how data is transmitted between them. TCP/IP is a large set of different communication protocols, based on the two original protocols of TCP/IP and IP. ---------------------------------------------------------------------- TCP/IP contains a series of protocols used to process data communication: TCP (Transmission Control Protocol)-UDP (user data packet protocol) between applications) -Simple IP (Internet Protocol) Communications between applications-ICMP (Internet message control protocol) Communications between computers-DHCP for errors and statuses (Dynamic Host Configuration Protocol) -For dynamic addressing -------------------------------------------------------------------- TCP is used for communication between applications. When an application wants to communicate with another application over TCP, it sends a Communication Request. This request must be sent to an exact address. After both parties "Shake hands", TCP will establish a full-duplex communication between the two applications. This full-duplex communication will occupy the communication line between two computers until it is closed by either or both parties. UDP is similar to TCP, but it is simpler, and the reliability is lower than TCP. TCP is responsible for communication between application software (such as your browser) and network software. TCP is responsible for dividing and loading data into IP packets, and then re-combining them when they arrive. --------------------------------------------------------------------- IP addresses are used for communication between computers. No connection protocol. It does not occupy the communication line between two computers in communication. The IP address reduces the need for network lines. Each line can meet the communication needs of many different computers at the same time. Messages (or other data) are divided into small independent packages and transmitted between computers over the Internet. The IP address is responsible for routing each packet to its destination. IP addresses are responsible for communication between computers. The IP address is responsible for sending the package to the recipient. ------------------------------------------------------------------- When an IP packet is sent from a computer, it will arrive at an IP router. The IP router is responsible for routing the package to its destination, either directly or through other routers. In the same communication, the path of a package may be different from that of other packages. The router is responsible for correctly addressing traffic, network errors, or other parameters. --------------------------------------------------------------------- TCP/IP addressing uses 32 bits or 4 numbers between 0 and 255 to address the computer. Each computer must have an IP address to connect to the Internet. Each IP package must have one address before it can be sent to another computer. Each computer must have a unique 4-digit address. TCP/IP uses 32 bits for addressing. The size of a computer is 8 bits. Therefore, TCP/IP uses 4 bytes. The domain name contains 12 Arabic numbers that are hard to remember. It is easier to use a name. Baidu.com is a domain name. The TCP/IP address is called a domain name. The domain name is translated into numbers by a DNS program. The DNS server is responsible for translating domain names into TCP/IP addresses and updating systems with new domain name information. When a new domain name is registered with its TCP/IP address, DNS servers around the world update this information.