how opendns works

Protocol) is on the network layer. 4, the Transport Layer (transport layer)in the OSI model, the transport layer is the highest level responsible for data communication and is the only responsible overall numbertransmission and control of the layer, to ensure the reliability of the connection, directly to run on a different hostprovide communication services on the application. TCP (Transmission Control Protocol) and UDP (User datagram protocols), which are the same as IP, work on the transpor

The function works with the help of stacks.The stack is a special storage space in memory, its storage principle is "advanced out", the first stored data is finally released.ESP is called the stack-top pointer, and EBP is called the stack-bottom pointer, which holds the start and end addresses of the current stack through these two pointer registers.The space formed between the ESP and the EBP becomes a stack frame. Usually, in VC + +, the data that c

I have been asked twice how iocp works (the operating system works, not the function), so I think it is necessary to write it down. After searching for the Internet for half a day, I wrote some functional implementation principles and did not mention the important points. In the last interview, the technical director told me that the book "Windows Advanced Programming Guide" has mentioned this, I came back

Write by nine days Yan Ling (jtianling) -- blog.csdn.net/vagrxie Discuss newsgroups and documents Orx file presentation A relatively mature engine cannot have a relatively mature game. I believe that, after all, the engine is not developed at home with a stuffy head, And it is promoted through game development. Relatively speaking, we haven't found a very large and sophisticated game created using orx, which also shows that orx is not mature. I don't forget to mention it at all. orx is

conversion is in progress. Due to the good layout of JSP, the actual development of Web applications is usually in the form of Jsp+servlet , JSP is mainly responsible for the presentation of data, servlet responsible for business logic and data calculation. This approach enables good code decoupling and hierarchical management, and also facilitates parallel development of UI staff and back-end personnel. JSP works the nature of the JSP is th

How the Java garbage collection mechanism works"Bo Master" Gao Ruilin"Blog Address" http://www.cnblogs.com/grl214I. The role of the garbage collection mechanism introduced in JavaAfter we have built the class, we create the object and allocate the memory space, in order to prevent the memory space being full, Java introduces garbage collection mechanism, reclaims the objects that are no longer referenced, frees the memory, loops incrementally, and pre

-related operationsQuery and Criteria interface: responsible for executing various database queriesHow Hibernate works:1. Through configuration config = new configuration (). Configure ();//Read and parse the Hibernate.cfg.xml config file2. Read and parse the mapping information by 3. Via sessionfactory SF = Config.buildsessionfactory ();//Create Sessionfactory4.Session Session = Sf.opensession ();//Open Sesssion5.Transaction tx = Session.begintransac

is for an auxiliary program, so the Web server starts and runs the program.A servlet is a Java program that runs on a Web server or application server, primarily for generating dynamic content on the server side. Can be seen as a Java classThe servlet is a regular Java code, with some new APIs in the code, but no new syntax involved.There are important statements that we are unfamiliar with in the servlet code. Servlets are not part of the Java EE and are separate specifications.The servlet ext

Spring framework to show how it works. I ' ve chosen this one because it's relatively simple as these things go, it does something that's relatively easy to Explai N, and I happened to need it recently for some work I was doing.Spring Bean Post ProcessingFirst I would like-to-start with a little explanation of the purpose of Spring. One of the things the Spring framework does is "dependency injection". This changes the typically tie together modules

How does CSS work? (which style does the browser choose if the style is repeated ??), How css works For example, tag P may be set to the values of relevant attributes (such as color: red;/color: blue) in Embedded style sheets and external style sheets ), which value does the Browser display the P style ??? This is how CSS works. (The specialization is important) CSS has three working mechanisms: 1. Inherita

HTTPS is actually made up of two parts: HTTP + SSL/TLS, which adds a layer of encryption information to the HTTP module. The transfer of information between the server and the client is encrypted through TLS, so the transmitted data is encrypted650) this.width=650; "alt=" https Works "src=" Http://www.evtrust.com/knowledge/images/https.png "/>1. Client initiates HTTPS requestThis is nothing to say, is the user in the browser input an HTTPS URL, and th

(collections.singletonlist (value));}voidBad (listvalues) { ...} //GoodFinalvoidGood (FinalT value) { if(Valueinstanceoflist) Good ((list) value); ElseGood (collections.singletonlist (value));} FinalvoidGood (FinalListvalues) { ...}Because, you know ... Your users, they're like this.// This library sucks@SuppressWarnings (' all '= (Object) (List) arrays.aslist ("abc"); bad (t);Believe me, I've seen a lot, and there's this.So, it's good to be paranoid.9. Always add default to the switch

: vs is known as "the strongest IDE in the universe", but sometimes the installation package is too big, it's just a few g, and there's a lot more to be done when it's installed, and that's what the Virgo people are going to endure! This article is not a spit slot, but rather an IDE that does not have to install a new version of a few g in an emergency scenario, but instead moves the higher version of the project to the lower version of the IDE and makes it work and debug the solution ~VS2013 ve

Author: Steven RicheRelease time: 2014 21 months 18Original link: http://code.tutsplus.com/tutorials/javascript-animation-that-works-part-4-of-4--net-35263Translation: Sub-yi---------will javascript to do exactlyBreak two sentencesToss for one months. Assorted things together. It's awful.Blog has been stopped for about one months, from today on everything is new, do yourself OK---------------------------------------------------------------------------

Springmvc can be said to be a relatively broad framework in Java applications. It works roughly as follows.1, the user initiates an HTTP request on the Web side, requests the server first receives and parses, if matches the Dispatcherservlet mapping path, the Web server will request to the Dispatcherservlet2, Dispatcherservlet will find the corresponding handler (request processor) processing according to the request,3. Handler returns the processed d

above is the personal view of this issue, in addition, I think, learning any technology can not be rushed, to the foundation of a solid, so learn what will soon.Extended ReadingThe list of topics for this article is as follows: How do we know how the JavaScript engine works JavaScript Quest: The importance of writing maintainable code JavaScript Quest: Use global variables with caution JavaScript Quest: Var pre-parsing and side effec

How Apache works in 2:1.prefork modeThe secondary multi-path processing module (MPM) implements a non-threaded, pre-derived Web server. It is suitable for systems that do not have a thread-safe library and need to avoid thread-compatibility issues, and it is the best mpm that requires each request to be handled independently, so that if a request has a problem it does not affect other requests.This mpm has a very strong self-regulation capability and

#createbeaninstance ()--Abstractautowirecapablebeanfactory#determineconstructorsfrombeanpostprocessors ()--Autowiredannotationbeanpostprocessor#determineconstructorsfrombeanpostprocessors ()Auto-injection of annotations based on member variablesAbstractautowirecapablebeanfactory#createbean ()-->abstractautowirecapablebeanfactory#docreatebean ()--Abstractautowirecapablebeanfactory#populatebean ()-->autowiredannotationbeanpostprocessor# Postprocesspropertyvalues ()--Injectionmetadata#inject ()-->a

Bootstrap's deployment usel works with dropload. js to implement sliding switching between images on mobile terminals, A slideshow can jump to the previous or next one by clicking the button. On the Mobile End, we often use sliding to achieve some time. How can we achieve this. The following describes how to use bootstrap's pluusel and dropload. js (mobile push and refresh plug-ins. HTML section JS Section Var invalid usel _ = $ ("# carousel-example-

How Struts2 works How Struts2 works: 1. Send the Action request to StrutsPrepareAndExecuteFilterStrutsPrepareAndExecuteFilter. doFilter () --> ExecuteOperations.exe cuteAction () --> Dispatcher. serviceAction () --> 2, StrutsPrepareAndExecuteFilter hand over request processing to ActionProxyActionProxy.exe cute () --> 3. ActionProxy creates an ActionInvocation instance and initializes it, before and afte