The answer is: The Accept process occurs after three handshakes, and after three handshakes are completed, the client and server establish a TCP connection and can interact with the data. You can then call the Accept function to get this connection.TCP Accept SummaryAfter the TCP accept is a three-time handshake, accept correctly returns after the TCP Server can connect with the client is established and can communicateNote distinguish between the lis
server perspective, it only needs to send a request SYN, and then receives ack to know that the connection can be established.
Therefore, when establishing a connection, you only need to shake hands three times at least, that is, the server receives the client SYN, and then sends the ACK to the client and carries its own syn, in this way, only three handshakes are required to enable both sides to receive SYN and ack.
Of course, you can also use 4 or more handshakes when designing your own, but
There are many articles on the Internet that TCP why the connection requires three times to shake hands, close the connection requires four times handshake, said a lot of principles, but let a lot of people difficult to understand.
In fact, there is only one sentence: TCP connection is between two endpoints, because the TCP connection is a reliable connection, so whether to establish a connection or close the connection, requires two endpoints to sen
VMware said on Wednesday that the new competition in the virtual software market in recent months has not suppressed the price of its products. VMware held a almost monopolized position in the virtual software market until last year.
Speaking at an investor meeting at Lehman Brothers, VMWare's CEO di'an said we did not find any price issues. Because of its very valuable features, we have been able to maintain the product price.
VMware's competitors
According to reports from the Linux community, Ubuntu8.10 will be released on December 10, 10.30, and will not be released in the Ubuntu style. The Red Hat Fedora10 has been pushed to the release in December. The release of Ubuntu8.10 is more meaningful, it will not have a major threat to competitors. According to the schedule of major Linux Release versions, no major version will be released on February 1, October. This is an exclusive opportunity fo
client side of the process is experiencing the following status:
The server side is experiencing the following process:
"Note" in the time_wait state, if the last ACK sent by the TCP client is lost, it will be re-sent. The time required in the TIME_WAIT state is dependent on the implementation method. Typical values are 30 seconds, 1 minutes, and 2 minutes. The connection is formally closed after waiting, and all resources (including the port number) are released.
"Question 1" Why is the
We are engaged in any industry, anything will exist in different competitors, do site optimization is the case, Baidu's home page only gives us 10 positions, we have to overcome peer opponents to get the 10 positions in one. But when our opponents are strong, it is not easy for us to win, only by studying the competition carefully can we get a real victory. As the old saying tells us, knowing knows what can be victorious. In order to understand the op
Analyze potential competitors from Google search engine (end)
Google search engine, the analysis of competitors is very clear. is also the most accurate. Because Google's information is huge. The information given is also very accurate. So when analyzing competitors, we usually like to use Google to analyze.
Take a quick look at the "ways to analyze
"Grandson of the attack," said: "The enemy, win, do not know the other and confidant, a win and a negative, do not know the other, not confidant, every battle will be perilous." It means that in a military dispute, both the understanding of the enemy and the understanding of themselves, the hundred war will not fail, do not understand the enemy but only know themselves, the possibility of winning or losing, not knowing the enemy, and do not know themselves, it is only the loss of every war. This
huge popularity of Docker in Silicon Valley developers. But now Google is also starting to support Rockert and integrating the technology into Kubernetes cloud computing software. Google claims it is "an important milestone in the Kubernetes project".Docker is trying to become a common container format for the entire industry. In fact, this is the advantage of it. If everyone uses this standard, running the software will become easier. But for Polvi and others, Docker is no longer simply the co
vice president of SAP marketing, said at the open-source business conference that these competitors have not yet formed a climate and may be difficult to achieve. He pointed out that every time there is a huge change in the market, for example, when customers change their computers to the Internet, users will trust companies they are familiar.
"When the market is consolidated, people will bet on the one side with the most investment," Graf said. "whi
I 'd like to say that for people who make Internet products,"Who are our users and who are our competitors? This is the primary issue of internet access.." Now, when talking about the Internet, we will first talk about the business model. When talking about the business model, we will ask how to make money and when to make profits. In fact, the business model is a system, divided into several aspects.First, the user modeIt is to answer who is their o
How to demonstrate the product:
The speech focuses more on the statement of views on a certain issue. It mainly exchanges views and allows contention. The audience may disagree with your views, but will certainly defend your right to speak.
Purpose of presales demonstrationIntroduce the company, and display the company's image through your own words and deeds and product introductions;Strengthen your own advantages and set technical thresholds for compe
Analyze the degree of SEO of a website, seoer are often to do the homework, from the analysis can not only identify the competitiveness of the optimal ability, but also to strengthen their own optimization skills, and then enhance the new optimization of thinking, learn to SEO children's shoes are of course can analyze other web site SEO status, Here a brief record of SEO analysis of competitive opponents of the thoughts to facilitate more people to refer to!
First, the analysis of natural top
position, its web page is not the opportunity to browse, so the webmaster to optimize the idea to layout the site is also obvious.
Analysis: When a keyword is more competitive, optimization thinking becomes more important. Of course, this is the site's biggest drawback, too focused on optimization and neglect of other factors, such as page beauty and so on.
V. Write in the last
In fact, the site has a lot of details worth learning. such as links to export a keyword export links, the author
other side of the site outside the chain are relatively high quality, then also determines its weight is similar. For such a website, even if do not do SEO, casually write a few articles will update faster than you, even if the articles will be reproduced in front of you. Is not very strange, outside the chain in the SEO accounted for a large proportion, at least for now, the search engine is very attention to the outside chain.
So, in the SEO choice of co
Content for the king, outside the chain for the emperor this cliché of the question is that we have long debated, I do not think so, should be said that the content of the king, link for the emperor, the first to know that the chain can also give us the ranking of the site to vote, the chain is to promote the target keyword ranking, this is a misunderstanding to, but also some of the situation is why the chain more, Included more, snapshots new, the site ranking is not very optimistic about it?
TCPIP Three-time handshakeTCP (transmission Control Protocol) transmission protocolTCP is the host-to-host layer of the Transmission Control Protocol, providing a reliable connection service, using three-time handshake confirmation to establish a connection:The bit code is the TCP flag bit, there are 6 kinds of marking: SYN (synchronous set up) ACK (acknowledgement acknowledgment) PSH (push transfer) FIN (finish end) RST (reset reset) URG (Urgent emer
responds with a packet back, it indicates that the host has this port, but since this scan is only the first handshake of the TCP three handshake, the success of this scan indicates that the machine being scanned is not very secure, A secure host will force a tightly connected three-time handshake to TCP;
FIN: Indicates that the sender has reached the end of
TCP (transmission Control Protocol) transmission protocol
Three-time handshake
TCP is the host-to-host layer of the Transmission Control Protocol, providing a reliable connection service, using three-time handshake confirmation to establish a socket connection:
"Bit code" is the TCP flag bit, there are 6 kinds of marking:
SYN (synchronous set up online)
ACK (acknowledgement)---> Acknowledgement: acknowledg
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