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Analysis of TCP three-way handshake and four-way handshake, analysis of tcp three-way handshake Reprinted from http://www.jellythink.com/archives/705What is TCP? I am not going to elaborate on what TCP is. When you see this article, I think you also know the concept of TCP and want to have a better understanding of TCP work, let's continue. It is just a super-tro

HTTP protocol---Get way and post way to obtain form data Example 3 (Unified way to get, solve Chinese garbled problem) The previous article only applies to the submitted data are in English, but if it is in Chinese will appear garbled situation, because we specify the encoding format for UTF-8, but the server default encoding format for iso-8859-1, so to solve th

two-way, Three-way and four-way matching two-way approval verifies that purchase order and invoice information match within your tolerances as follows: quantity billed on the purchase order shipment are less than or equal to Quantity ordered on the Purcha SE order shipment. Invoice price in the purchase order ship

CryptographySlow encryption, but can provide a better identity authentication technology, used to encrypt symmetric encryption key four, one-way authentication HTTPS requires a handshake before establishing a socket connection, as follows: The client sends the SSL protocol version number, the encryption algorithm type, the random number and so on to the service side. The server returns the SSL protocol version number, the encryption algorithm type, t

Shell: ##################################### echo "Time is" date=$ (DATE +%y%m%d) echo $DATE echo "creat a fileder named by Time "Mkdir-p $DATEread-P" input number: "num if [$num-eq] then mv $DATE" Pass "fi#include BatSet "ymd=%date:~,4%%date:~5,2%%date:~8,2%"MD%ymd%PauseMove%ymd% C:\Users\Administrator\Desktop\passPauseThe same way of thinking differently shell script way

Vsftp is not so easy to fix (xinetd way and independent way) [%= @title%] [%= @count%] ticket [[%= @percent%]%] The default is set to use xinetd to start vsftp, which is also recommended in the document because it can use many of the control features of xinetd, but if you want to be more

A problem of codeforces round 388 Div2A. Bachgold Problem The question asks how many prime numbers are added to the input of N. Prime can be reused, then this problem with greed, starting from 2, because you ask the most primes, it is certainly the smaller the number of the more, done, suddenly found not to hit the table, n>=2, or odd, or even, even 2, The odd number of a 2 to 3 on it, it is so simple .... But at that time is really a flash out of prime number, this is not the brain to apply the

TCP/IP three-way handshake and four-way handshake Dos attacks, tcpdosStatus chart of TCP ConnectionThree handshakes of TCP connection establishment and four handshakes of closing connectionPaste a telnet command to establish a connection. If the connection is disconnected, use the packet captured by wireshark.1. Establish a connection protocol (three-way handshak

Analysis of three-way handshake and four-way handshake procedures of TCP/IP protocolI. TCP Message formatFor more information about the TCP/IP protocol, see "TCP/IP protocol details. The following figure shows the TCP packet format:Figure 1 TCP Message formatThere are several fields that need to be described below:(1) sequence number: Seq number, which occupies 32 bits. It is used to identify the byte strea

[Linux] linuxtcp three-way handshake and four-way handshake1. What is TCP? 7-layer OSI model TCP is on the fourth layer -- the Transport layer, and the data on the fourth layer is the Segment-> message. IP address on Layer 3-Network layer, data on Layer 3 is called Packet-"data Packet ARP on the second layer -- Data Link layer; on the second layer, we call it Frame-"Frame. When data is sent from the a

TCP three-way handshake and four-way handshake Three-way handshake:Three handshakes are required to establish TCP. The Client sends the connection request message first. The Server segment receives the connection and replies to the ACK message, and allocates resources for the connection. After the Client receives the ACK packet, it also generates an ACK packet to

Classic three-way handshake: (# add, "handshake" refers to the link from the left to the right in the figure) The classic four-way handshake closure diagram: TCP is the transmission control protocol used by the host to control the host layer. It provides reliable connection services and uses three handshakes to establish a connection: the bit code is the TCP flag bit. There are 6 types of labels: syn (sync

Compared with socket developers, the TCP creation and link Division processes are automatically created by the TCP/IP protocol stack. therefore, developers do not need to control this process. however, it is helpful to understand the underlying TCP operation mechanism.In addition, a written examination such as a network protocol engineer is almost mandatory. the enthusiasm of the company for this issue is beyond my expectation :-). This problem is sometimes emphasized before the interview in the

Think in another way, think in another way In the development of a system, the code is just a carrier of arrangement and combination into special functions. Just like English is made up of 26 letters. The scattered and inanimate arrangement and combination become innovation. But there are so many possibilities for a random combination of 26 letters. If there is no rule in it, how can we learn it. Therefore,

Three-way handshake to establish a connection: First handshake:The client sends the SYN Packet (SEQ = x) to the server and enters the syn_send status. wait for confirmation from the server; The second handshake:When the server receives the SYN packet, it must confirm the customer's Syn (ACK = x + 1) and send a SYN Packet (SEQ = Y), that is, the SYN + ACK packet, the server enters the syn_recv status; The third handshake:The client receives the server'

TCP three-way handshake/four-way handshake explanation 1 establish a connection protocol (three-way handshake) (1) the client sends a TCP packet with SYN flag to the server. This is packet 1 during the three-way handshake. (2) The server responds to the client. This is the first packet in the three-

The legendary WCF (1): Is this hard to learn?The legendary WCF (2): What about service agreements?Legendary WCF (3): multiple protocolsLegendary WCF (4): send and receive SOAP HeadersLegendary WCF (5): data protocols ()Legendary WCF (6): data protocols (B)Legendary WCF (7): "one-way" "two-way"Legendary WCF (8): Play with message protocolsLegendary WCF (9): stream and file transferLegendary WCF (10): messag

TCP Overview TCP regards the connection as the most basic object. Each TCP connection has two endpoints. This breakpoint is called socket ), it is defined as a socket formed by splicing the port number to the IP address. For example, if the IP address is 192.3.4.16 and the port number is 80, the resulting socket is 192.3.4.16: 80. However, for TCP-based communication, a two-way channel is established between the client and the server on the logic laye

TCP three-way handshake and four-way handshakeCompared with SOCKET developers, the TCP creation and link Division processes are automatically created by the TCP/IP protocol stack. therefore, developers do not need to control this process. however, it is helpful to understand the underlying TCP operation mechanism. in addition, there are network protocol engineers such as the written examination, almost mand

At this stage, there are two encryption methods, one-way encryption and two-way encryption. Two-way encryption is the most common encryption algorithm, it will be able to directly understand the plaintext data encryption is not directly understood ciphertext data, and then, when needed, you can use a certain algorithm to decrypt these encrypted later ciphertext i