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 three-way handshake to establish a connection and four-way handshake to disconnect, handshake to disconnect
Three-way handshake to establish A connection the first handshake: host A sends A packet with syn = 1 and generates A data packet with seq number = 1234567 to t
TCP three handshake and four wave of the whole process
TCP is the host to the host Layer Transmission Control Protocol, providing a reliable connection service, with three handshake confirmation to establish a connection:
Bit code is the TCP flag bit, there are 6 kinds of representations:
SYN (Synchronous establish connection)
ACK (acknowledgement indicates response, confirmation)
PSH (push indicates data
This is a network programming interview key points of knowledge, summed up: to establish a connection-three times handshake
TCP establishes a connection between the server and the client through a three-time handshake.The so-called three-time handshake (three-way handshake) means that when a TCP connection is established, the client and server are required to sen
http://blog.csdn.net/zuyi532/article/details/7599766
1, TCP three times the role of shaking hands:
The purpose of the three handshake is to connect the server to the specified port, establish a TCP connection, and synchronize the serial number and confirmation number of both sides of the connection and exchange the TCP window size information. In socket programming, when the client executes connect (), the
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 fla
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 b
This article comes from NetEase cloud community.How can you quickly get a large number of target users at a low cost, rather than a protracted war with your competitors?This is not common on the internet today. Now, most of the industry is already a long time competition in the Red Sea, and the blue Ocean market technology, resource barriers are very high, the general product is far behind. In the fierce competition of the Red Sea market, how can we a
This article comes from NetEase cloud community.How can you quickly get a large number of target users at a low cost, rather than a protracted war with your competitors?This is not common on the internet today. Now, most of the industry is already a long time competition in the Red Sea, and the blue Ocean market technology, resource barriers are very high, the general product is far behind. In the fierce competition of the Red Sea market, how can we a
[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 application layer, header information is added
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 the Server segment and allocates resources s
Original link Address: http://www.2cto.com/net/201310/251896.html Three-time handshake and four-time handshake process resolution for TCP/IP protocol One, TCP message formatFor more information on TCP/IP protocol, see the three volumes of the TCP/IP protocol. The following is a TCP message format diagram: Figure 1 TCP Message FormatThere are several fields that need to be highlighted below:(1) Serial number
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 handshake
Document directory
In TCP/IP, TCP provides reliable connection services and uses three handshakes to establish a connection, as shown in figure 1.
In TCP/IP, TCP provides reliable connection services and uses three handshakes to establish a connection, as shown in figure 1.
(1) first handshake: when a connection is established, client a sends the SYN Packet (SYN = J) to server B and enters the syn_send status, waiting for confirmation from server
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
one, TCP message formatThe following is a TCP message format diagram:There are several fields that need to be highlighted below:(1) serial number: SEQ sequence number, which is 32 bits, is used to identify the byte stream sent from the TCP source end to the destination, which is flagged when the initiator sends the data. (2) Confirm the serial number: ACK number, accounting for 32 bits, only the ACK mark bit is 1 o'clock, confirm the ordinal field is valid, ack=seq+1. (3) sign: A total of 6, nam
TCP (Transmission Control Protocol) Transmission Control Protocol
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 location code is the TCP flag. There are 6 types of tags: SYN (synchronous established online) ack (acknowledgement confirmation) Psh (push transfer) Fin (finish ended) RST (reset) URG (Urgent urgent)
Sequence Number acknowledge number (confirmation n
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
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