what is otdr testing

Power article: The General people always ignore the problem of power supply stability, only think that the power supply can be enough, but the power supply stability directly affect the hardware (especially the motherboard) life. For example, once there is a server power, testing, power is only a short time in the 12.47-12.52v wandering, =_=! stable chilling. Po

Original address: http://www.cnblogs.com/engeng/articles/5959335.htmlRecently, the interview is often asked this question, want to interview the interviewer wants to examine the network knowledge, see whether this knowledge has formed the architecture.When we enter www.linux178.com in the address bar of the browser, and then go to enter, enter this moment to see what happened to the page?The following proce

When we enter www.linux178.com in the address bar of the browser, and then go to enter, enter this moment to see what happened to the page?The following procedure is for personal understanding only:Domain name resolution--Initiates a TCP 3 handshake--initiates an HTTP request after the TCP connection is established--the server responds to the HTTP request, the br

senior developers or supervisors to waste their time checking out code that doesn't even compile.c) Whether the code is functioning correctly when executedThe code review personnel are also not responsible for checking the correctness of the function, that is, the code that needs to be reviewed must be the responsibility of the developer or quality officer for the functionality of the code.D) Does the revi

What is configuration? In short, the use of industry-based application software (monitoring configuration and control configuration), the requirements of the project, software and hardware configurations, so that they meet the needs of users.In the use of industrial control software, we often refer to the word configuration, the configuration of English is "confi

What is configuration? In short, the use of industry-based application software (monitoring configuration and control configuration), the requirements of the project, software and hardware configurations, so that they meet the needs of users. in the use of industrial control software, we often refer to the word configuration, the configuration of English is "conf

What is the biggest difference between Warcraft and Starcraft? In other places, I saw some new people playing Starcraft and Warcraft again. So I asked, "What is the biggest difference between Warcraft and Starcraft" Then, the common God farmers will answer the biggest difference between Warcraft and Starcraft (only fo

Configuration is: php+apache+mysql+windows The second-level menu is the result of JS+CSS completion: The page shown on the phone below, the level two menu on the left is not open (JavaScript script is not loaded at all, because the mouse hover does not open the level two menu): And the page shown on the computer

What is the process of a complete HTTP transaction? statement: The statement in this article is only a summary of personal understanding, not necessarily completely correct, but can help to understand. For the HTTP protocol, refer to the following: HTTP protocol ramble on Http://kb.cnblogs.com/page/140611/HTTP Protocol Overview http://www.cnb

project process, strengthen the control, to avoid the occurrence of unexpected situation;3. Introduction of technology and tools, such as automated testing, improve testing efficiency, shorten testing time;4. Strengthen communication within the project team, improve communication efficiency and shorten the delay time caused by communication;In addition, the test

Career planning has now become a fashion, but what is the purpose of career planning? Some people have a profound understanding and regard career planning as the fundamental guarantee for career development. Some people may have misunderstandings and are still confused. They believe that career planning is only required when there

will certainly fit the trend of your observational data. However, on slightly changed data, the fitting boundary changes greatly, which will be very significant. The K=1 model hasHigh Variance.?? But what is the generalization capability of the model and how does it behave on new data??? At the moment you can only see the training data, but the quantitative training error

needs, designing, coding, and testing, but we were always at that little time, except for the time spent in daily life and with our girlfriends, it's okay to leave the time for reading at work. Oh, yes, I forgot to count the time you spent on Dota. How long can I read books !!?? When a programmer does not work hard, he cannot do it hard. So the book is still to be read. Read-Only classic. You can decid

This article is intended for project managers who are committed to promoting scrum. Many of my clients have asked me this question: they have been using scrum for a while and it is really a good thing to make scrum, it can effectively improve the team's productivity, boost the team's morale, reduce external interference with the team, and provide a lot of benefits, but the bosses, especially non-Software De

so on. 2) I want to know where some Web projects are located, the domain name to configure, and where to put the access logs. This is what I need to know. View Nginx Virtual Host configuration, vim and other basic usage. 2, deployment on-line is responsible for the special operations, but on-line, I have to confirm that everything

What is a solid-state drive? How do you use it? Correct use of solid-state hard disk method Guess what you like: the difference between m.2 and SATA3 SSD In general, the proper use of solid-state drives is nothing more than 4K alignment and the ability to turn on the hard drive AHCI. In addition there are a few pe

the top-notch sloek billiards, each shot is bland, just because the back of the ball is too in place.A classmate asked, that I do the project is too good, not a chance to meet some of the challenges of high difficulty? Rest assured, the General company employs a product manager to help you create high-risk events. In the same way, a good engineer chooses the bes

HTTP protocolFor the HTTP protocol, refer to the following:HTTP协议漫谈 http://kb.cnblogs.com/page/140611/HTTP协议概览 http://www.cnblogs.com/vamei/archive/2013/05/11/3069788.html了解HTTP Headers的方方面面 http://kb.cnblogs.com/page/55442/When we enter www.linux178.com in the address bar of the browser, and then go to enter, enter this moment to see what happened to the page?Domain name resolution--Initiates a TCP 3 handshake--initiates an HTTP request after the TC

working days of the audit process, the audit may be contacted with you in order to improve the approval rate, please keep the QQ online or mobile phone unblocked. 3. After the approval, will be within 7 working days of your program testing and packaging, in the course of testing if your program has some problems, we will promptly communicate with you. 4. After packaging, will be released within 1 working

important decisions. All the important decisions that a software architect must make are beyond the database, Web server, and framework.(Programmer :) But first, you must decide what database, Web server, or framework to use!(Senior Architect: In fact, you should do these things in the later stages of development-after you have mastered more information.(Senior Architect: When the architect hastily decided to use a database, he later found that using