Today's network is no longer the network of the past. A few years ago, the focus of the network began to shift, moving outward from the internal data center of the enterprise to the cloud. For users, the main use of the network has changed from a computer wired connection to a mobile device wireless connection. With the fundamental change in the location of business processing and 

Looking back over the past few years, many new things have appeared in the field of distributed systems, especially the rise of cloud and AI, which has brought this field that was not very popular in the past to the forefront. During this period, many new technologies and ideas were born This ancient realm is back to life.

Recently, a series of layoffs by Internet companies have continued to stir up the heat. The topics of the age ceiling of technical people, such as #middle age crisis#，#dismiss#

In software development, a common metric called code coverage Standard. It is used to measure the percentage of system code covered by the tests performed before deploying the code. Code coverage is usually measured automatically by a separate software program or some code coverage tools can be manually launched from the command line. The test results accurately show what code was executed when the test suite was run. And can reveal which lines of code may require further testing.

Human creativity is as powerful as destructive power."

Network interoperability has also spawned complicated routing protocols and various Internet services. As well as the huge field of "network security."

 The meaning of IPv6

 Beginning in the 1990s, the IETF noticed that the mainstream version of Internet addresses IPv4 was running out. In order to avoid the disruptive impact on the Internet, research on next-generation Internet protocols began to replace IPv4.

The core switches should all adopt a modular structure that must have a considerable number of slots, have strong network expansion capabilities, and can select modules of different numbers, different rates and different interface types according to actual or future needs. To adapt to ever-changing network requirements.  

Now more and more employees are already on the move:

1.Up to 90% of employees work outside the company's headquarters;

2.Up to 60% of employees need to collaborate regularly with people from different regions and even different time zones;

3.The growth rate of online video traffic of large enterprises is as high as 70% per year;

 At present, enterprise network security issues have become a common concern of corporate management and IT teams. How to prevent and prevent security vulnerabilities and threats, how to choose effective security products to solve problems is plaguing enterprise management and IT team?