tcp glo

Turn from:Http://blog.chinaunix.net/uid-9112803-id-3212041.htmlSummary:In this paper, we briefly introduce the theory of TCP-oriented connection, describe the meanings of each field of TCP messages, and select TCP connections from Wireshark capture packet to establish the relevant message segment.I. OverviewTCP is a reliable connection-oriented transport protocol

This title uses two Don's and three names. It is actually the same thing, but there are different sayings on the Internet, in addition, it seems that some people call TCP drilling. (My friend Niu asked me, "Do you want to punch the hole? Would you like to help me borrow an electric drill?" "~! · ￥ % ...... ·!"). Let's take a look at the technical background: The rapid development of the Internet and the limit on the number of IPv4 addresses make Netwo

TCP has a total of four main timers. As mentioned above, a timeout timer is the most complex one in TCP, and the other three are: Stick to Timer Active Timer 2msl Timer The persistence timer is used to prevent the two sides from waiting for deadlocks after the announcement window is 0, while the persistence timer is used to process semi-open connections.1. Stick to the timer It is simple to stick to th

Introduction to tcp protocol (TCP/IP) and TCP/IP Role of the transport layer: the IP layer provides point-to-point connections, and the transport layer provides end-to-end connections. Transport Layer Protocol 1. TCP (Transmission Control Protocol) Transmission Control Protocol Reliable and connection-oriented pro

After writing the topic just think of one thing, if the phone as a client (not connected to the case of the router), the wireless Phone connection module will assign an IP address,,, this IP address in advance I do not know .... I'll see if there's an instruction in the AT command that prints the IP address of the device after connecting to its own WiFi signal.I can't find ......... .......OK, I connect directly with the phone, look at the IP address assigned by the phone, and then set up the mo

First, TCP Commonly used port scanning methods are the following three: 1.connect scanning We know that the common TCP socket implementation process is The more essential connection and end process is the following: From the above two figures we can see that the target host of a port if the monitoring state (listening or linsten), then when I connect the target host can be successful, otherwise the port is

TCP/IP details -- Role of the TCP Header option field -- TCP Header1. Set the option field of the TCP header to 40B and write down some common items:2. The Option END field (EOP, 0x00) occupies 1B, and only one packet segment is used once. It is placed at the end to indicate that there are no more messages in the heade

TCP, UDP network programming job generation, write C language TCP programNetwork Programming using COverview? This homework was due by 11:59:59 PM on Thursday, April 26, 2018.? This homework would count as 8% of your final course grade.? This homework was to be completed individually. Share your code with anyone else.? You must use C for this homework assignment, and your code must successfully compileVia G

This title uses two comma three names, actually said is the same thing, but the internet has a different version of it, and also seems to have someone called TCP drilling (my friend, I heard after the girl asked "to punch Ah, or I help you to borrow an electric drill to come?" "" ~! ￥%......! ”）。 Gossip Less, we first look at the technical background: The rapid development of the Internet and the limitation of the number of IPV4 addresses make netwo

Client: Using system;Using system. Collections. Generic;Using system. componentmodel;Using system. Data;Using system. drawing;Using system. text;Using system. Windows. forms;Using system. net. Sockets;Using system. net;Using system. Threading; Namespace mytcpchat{Public partial class form1: Form{Private thread th;Socket C;Public form1 (){Initializecomponent ();Control. checkforillegalcrossthreadcils = false;} Private void form1_load (Object sender, eventargs E){ }Public void client (){Try{Ipend

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 address (MAC address) is a unique and permanent address for each network adapter, totalling 48bit. In TCP/IP, a logical address is called an

Research on Peer-to-peer communication method of Udp/tcp through NAT (Udp/tcp hole Hole punching) Introduction to the type of NAT device: Reprint http://www.limou.net/?p=120 The type of NAT device has a very important influence on TCP traversing NAT, according to the port mapping method, Nat can be divided into 4 categories, the first 3 NAT types can be collectiv

http://view.inews.qq.com/a/20161025A0766200QQ in narrowband eraQQ is a narrow band of the most representative of the product, in that network transmission efficiency is lower than the era, we still remember Google's homepage? Why is the simple page of Google so concise?Google was born in 1998, is also in the narrow-band era, you will find its home byte size is less than 1024, why less than 1024 bytes, because the Ethernet MTU (that is, the largest transmission unit) is 1024,google in order to le

Principle of TCP/IP reliability Sliding Window congestion window and TCP Window TCP and UDP are on the same layer-transport layer, but the most difference between TCP and UDP is that TCP provides a reliable data transmission service, which is connection-oriented, that is, th

Document directory 1. Establish a connection 2. End the connection. 3. Maximum packet length 4. TCP status migration Diagram 5. rst. both open and close 6. TCP Server Design 1. Interactive Data Stream of TCP 2. TCP block data streams From http://hi.baidu.com/gookings/blog/item/6c21292a0fe7103c5243c155.html

Recently, I encountered an online alarm: a large number of time_wait servers make it unable to establish a new HTTP connection with downstream modules. During the solution, I checked the classic textbooks and technologies.ArticleTo enhance the understanding of TCP network problems. This is recorded as a note.Note: This article mainly introduces the many basic knowledge involved in TCP programming. The solut

Directory: TCP Header Maximum message segment length Semi-closed State transition Diagram Incoming connection request queue 1.TCP Header TCP provides a connection-oriented, reliable byte-stream service. Connection-oriented means that two applications that use TCP (typically a customer and a server) must establish a

TCP protocol OverviewThe TCP protocol and the UDP protocol are at the same level: the Transport Layer , but there is a big difference between the two, the TCP protocol has the following characteristics: TCP provides reliable data transfer service, TCP is conn

Finally, we finally came to the large header TCP protocol. In order to provide reliable transmission services for the application layer, various mechanisms are designed for tcp to achieve possible errors during transmission, such as packet loss, retransmission, disordered order, and link transmission errors. 1. TCP Overview First, let's take a look at the header

There are many network protocols based on TCP protocol, such as TELNET,SSH, FTP, HTTP and so on. These protocols can be broadly divided into two broad categories based on data throughput: (1) interactive data types, such as TELNET,SSH, which in most cases are only small-traffic data exchanges, such as pressing the keyboard, echoing some text, and so on. (2) data block types, such as FTP, this type of protocol requires