tcp ip ports and protocols

connection, it is still a stateless connection.There was a very tolerant notion that was not clear.That is why HTTP is a short, stateless connection. And TCP is a stateful long connection? HTTP is not built on the basis of TCP, why can it be a short connection? now it's clear. HTTP is a short connection when the TCP connection is turned off after each request is

Different TCP/IP layers provide different security. For example, a virtual private network is provided at the network layer and a secure connection service is provided at the transmission layer. The following describes the security of TCP/IP at different levels and the methods to improve the security of each layer.I. S

Cp http udp: All are communication protocols, that is, the rules observed during communication. Only when both parties "speak" according to this rule can the other party understand or serve it. Relationship Between tcp http and UDP: TCP/IP is a protocol group, which can be divided into four layers: network interf

Basic overviewThe primary function of the transport layer is to provide end-to-end communication to applications on two hosts, identifying the correspondence between the corresponding programs on the two hosts via the port number. The most important two protocols in the transport layer are TCP and UDP, which can be used to identify the protocol type that transmits the data based on the Protocol field of the

1th Chapter the concept of TCP/IP TCP/IP refers to the set of network protocols used for the Internet and many other networks. TCP/IP Features: Ø logical addressing-the physical addre

also used for many other purposes. For example: Many systems handle dynamic ports starting around 1024.(3) dynamic and/or private ports (and/or private Ports): from 49152 to 65535. In theory, these ports should not be assigned to the service. In fact, machines typically allocate dynamic

(completion project)? Because the options content is not necessarily how big, but we know that each IP data must be a number of bits, so, if the options data is less than the bits, then the Padding active. You just have to know that the IP header contains: TTL, Protocol, source address and destination address is enough! The source of the IP header and the destin

Reference content:Http://baike.baidu.com/link?url= 6rsx0yrjy8chn4b0kflmjkdl23xutqxo6aziaxbh2ealwcxuuxmy-2ijhhciqifa8q20vg6ew9ps4ef9qrchbq#2_6 TCP/IP TCP/IP is a shorthand for the transmission Control protocol/internet Protocol, which is the most basic protocol for the Internet, which is the transmission Protocol/Intern

-oriented, nor are they guaranteed to be reliable, a bit like sending letters, writing a letter in a mailbox, neither guaranteeing that the letter will not be lost in the mail, nor guaranteeing that the letter is sent to the destination in order. Applications that use UDP protocols need to do their own job of throwing BAOZHONGFA, sorting messages, and so on. After the destination host receives the packet, how to reach the application at the end of ea

TCP message format is as follows:Figure 2 TCP Message FormatSource and destination portsUsed for multiplexing/multiplexing of data from or to upper-layer applications, it is understood that ports are used to identify different processes on the same computer.Serial number and confirmation numberThese two fields are a critical part of the

Server Leasing--- Common network protocols: The difference between TCP and UDP and TCP and UDP difference TCP--- Transmission Control Protocol , which provides a connection-oriented, reliable byte-stream service. Before customers and servers Exchange data with each other, they must first establish a a

First, both TCP and UDP protocols run on the transport layer. UDP protocol: user data packet Protocol 1. UDP is connectionless. That is to say, you do not need to establish a connection before data transmission (of course, there is no link release at the end of data transmission), which reduces the overhead and the latency before data transmission. 2. UDP uses the best delivery effort, but does not g