tcp ip volume 1

1.TCP of services虽然TCP和UDP最后都会通过IP层传输，但是二者却为用户提供完全不同的服务，TCP提供的是面向连接的，可靠的字节流服务面向连接意味着俩个使用TCP的应用在彼此交换数据之前必须先建立一个TCP连接。可以用打电话比喻TCP的连接，要想俩个人通话，首

the general subnet should be 1), that is, the following figure of Router 3. Access to the information can be found that the IP address can be divided into a, B, C, D, e five categories. As shown in the following figure. Figure 1-3 IP address sub-classification 192.48.1.5 is obviously a class B address. The Class B ad

The differences between TCP, IP, HTTP, and SOCKET and the connection network are classified as follows: corresponding to the physical layer -- data link layer -- network layer -- IP protocol transmission layer -- TCP protocol Session Layer -- presentation layer and application layer -- HTTP protocol www.2cto.com socket

1.TCP Connection Establishment Set Host B to run a server process that first emits a passive open command, telling its TCP to be ready to receive successive requests from the client process, and then the service process is in the listening state. Continuously detect whether there is a customer process to initiate a continuous request, if any, to respond. Th

point, the connection is established. This is called a three-way handshake. If you want to prepare both parties, you must send three packets, and only three packets are required. We can imagine that if TCP's timeout retransmission mechanism is added, TCP can completely ensure that a data packet is sent to the destination.2. End the connection. TCP has a special concept calledHalf-closeThis concept means th

should be 1), that is, router 3 in the following figure. Access to the data can be found that the IP address can be divided into a, B, C, D, e five categories. As shown in the following figure. Figure 1-3 IP Address sorting 192.48.1.5 is clearly a class B address. The Class B address network number is clearly indicat

server. At this point, the connection is established. This is called a three-way handshake. If you want to prepare both parties, you must send three packets, and only three packets are required.We can imagine that if TCP's timeout retransmission mechanism is added, TCP can completely ensure that a data packet is sent to the destination.2. End the connection.A special concept of TCP is half-close, which mea

1, to understand the HTTP and socket first to be familiar with the network layer seven: The number of net transfer table should be,2,http protocol: Hypertext Transfer Protocol, which corresponds to the application layer, is used to encapsulate the data.TCP/UDP protocol: Transmission protocol, which corresponds to the transport layer, mainly solves the data transmission in the network.IP protocol: Corresponds to the network layer, also solves the data