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  Why TCP needs 3 handshakes

Prerequisite Knowledge First, let's look at the control bits and state machine of TCP, which form the basis for understanding the three-way handshake of TCP. TCP Packet Control Bits The control bits in the TCP packet header are used to control the status of the TCP connection and can indicate various control information such as connection establishment, termination, reset, etc. There are six common control bits: SYN (Synchronize Sequence Numbers): Requests to establish a connection (part of the...

   REASON,NETWORK,TCP,EXPLANATION,HANDSHAKE     2024-09-28 08:57:52

  Why does Symbian collapse?

On 24th January, Nokia announces a disappointing news that they would give up Symbian. The 808 PureView released last year will be its last Symbian model.  Symbian was born in 1998, it was supported by the then three mobile giants : Sony Ericson, Motorola and Nokia after its birth, later Samsung and LG also joined the Symbian camp. In 2000, the first Symbian model in the world Ericoson R380 was released, in 20006, there were over 100 million Symbian handphones on the market. But in 2007, t...

   Nokia, Symbian, Collapse, Analysis     2013-01-28 03:06:09

  Kubernetes: Docker out

Recently，The hottest news in the Kubernetes circle that docker will be deprecated has been confirmed by the release of 1.20. Docker support in the Kubelet is now deprecated and will be removed in a future release. The Kubelet uses a module called “dockershim” which implements CRI support for Docker and it has seen maintenance issues in the Kubernetes community. We encourage you to evaluate moving to a container runtime that is a full-fledged implementation of CRI (v1alpha1 or v...

   DOCKERSHIM,DOCKER,KUBERNETES     2020-12-19 21:10:21

  What will happen after Baidu acquires PPS?

One month ago there was some news that Ai Qiyi would acquire PPS through Baidu Now this has been confirmed, Baidu will spend $400,000,000 on acquiring Shanghai Public Source Network Co., Ltd. (PPS). After completion of the acquisition, Ai Qiyi will likely change the overall content and production line of PPS so that they can complement each other's shortages. Many people are optimistic about this merger, Ai Qiyi can complement its shortage on PC side and PPS can also get more copyrighted film an...

   Ai Qiyi,Sohu,Youku,PPS,acquisition     2013-04-26 22:53:12

  Cybersecurity | The New Dangers That Lurk Online and Their Solutions

(Image source: Pexels) Data is one of the most important things to us. While robbers that steal valuables like laptops, phones, or money are still a threat, cybercrimes are also more dangerous than ever. That’s because your data is far more valuable than you might think. Companies benefit from users’ data by applying it for their indexing, marketing, and accumulation needs. They actively use this information to sell you more products. Have you ever visited Amazon and instantly got a ...

   DATA SECURITY,VPN     2020-04-23 06:47:37

  Use DTrace to diagnose gdb issues

A few days ago, I installed the newest 64-bit gdb program (version 7.7.1) on Solaris 10 (X86_64 platform) to debug programs. After playing with the gdb a day, I found 2 issues about gdb:(1) The "set follow-fork-mode child" command doesn't take effect. By default, after the parent process forks the child process, the gdb will track the parent process, so this command can make gdb begin to follow the child process. But this command works OK on Linux.(2) The gdb can't parse the 32-bit application c...

   DTrace, debug, gdb, UNIX     2014-06-28 05:11:20

  13 Hours of Crisis: Tracking a GitHub Poisoning Incident

Incident Overview Since 6 PM Beijing Time on December 4, 2024, “ghost repositories” have been appearing on GitHub. These repositories contain no code but include deceptive virus files. That same day, they became the fastest-growing repositories on GitHub in terms of stars. Over 180 fake zombie accounts were spreading the virus, waiting for victims to fall into their trap. A Chinese developer—myself—took notice of all this. After days of probing and searching, I identified...

   GITHUB,POISON,SIMPLEBOT,CHINA     2024-12-06 22:14:25

  How to be jQuery-free?

jQuery is now the most famous JavaScript library. There are around 57.3% websites in the world using jQuery, i.e, 6 out of 10 websites are using jQuery. If we only consider those websites which use libraries, then the percentage is even higher which is 91.7%. Although jQuery is very popular, its size is still a headache to many websites maintainers. The uncompressed jQuery 2.0 has a size of 235KB, the size is 81KB after optimization.The jQuery 1.8.3 which supports IE 6/7/8 has a uncompressed si...

   jQuery,JavaScript,ECMAScript,CSS3     2013-05-13 11:53:20

  Net Neutrality is Dead - and Web Development Will Never Be The Same Again

Against the wishes of web users and tech businesses alike, the FCC has pushed through regulations to kill net neutrality. Here’s what that means for web developers. On December 14, 2017, the FCC voted in a 3-2 decision to roll back the Obama administration’s 2015 net neutrality rules. These policies, which demanded stronger oversight for broadband companies and internet service providers, ensured that all data on the web was treated equally. Most importantly, they prevented web traf...

       2019-05-02 21:55:53

  Cloud Computing’s most Basic Concepts-Service Models

With the containerization of Docker, Kubernetes, CNCF, and the development of open-source communities, related frameworks and technology is booming and iterating rapidly. Cloud Computing, been applied for many years, is pushing developers into the new technological era. Companies and developers who are not using or not planning to use Cloud-Native gradually feel tremendous pressure in keeping up with the technology trends. The first step is to understand the concepts of IaaS, PaaS, FaaS, SaaS, S...

   CLOUD,PAAS,IAAS,CONCEPT     2021-01-24 05:23:11

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