what is sip trunk and what is sip gateway

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What is hard fork, what is soft fork, what is consensus?

Chapter No. 0 Introduction Bitcoin is a set of software, the software code to modify the upgrade will often involve two concepts, a called hard fork, a soft fork. What the hell does that mean? The most common definition in the community is the modification of consensus. But it is difficult to understand

What is extreme programming? What is programming as an excuse? What is agile development?

progress, changes, issues to be resolved, and potential difficulties, and adjust the development process in a timely manner according to the actual situation. Why is it called "extreme" (Limit) "Extreme" (Limit) means that, compared with the traditional project development method, XP emphasizes that every method and idea listed in it is the ultimate and the best. What

What is chip decryption? What is IC decryption? What is a single-chip microcomputer decryption?

What is Chip Decryption ? What is IC decryption ? What is a single-chip microcomputer decryption ? Brief description of Chip decryption: nbsp; Chip decryption is also known as a singl

What is the difference between a static global variable and a normal global variable? What is the difference between a static local variable and a normal local variable? What is the difference between a static global function and a normal global function?

declare this function and you can use it. 1, what is the difference between a static global variable and a normal global variable? What is the difference between a static local variable and a normal local variable? What is the d

What is Web? What is a Web server? What is an application server?

1, what is the Web?  In short, the Web is a Web site that is based on the HTTP protocol and is accessed by a browser. The most commonly used meaning at the moment is the section on intenet that

What is PRD? What is a MRD? What is BRD?

What is PRD? What is a MRD? What is BRD? These questions are in the group, and a group of friends asks if there are any PRD documents; When you see this message, there may be a lot of friends thinking:

What is the scope chain, what is the prototype chain, what are the differences between them, and what exactly do they refer to in JS?

Scope is for variables, for example, we create a function that contains a function, and now there are three scopesGlobal scope ==> function 1 Scope ==> function 2 scopeThe scope is characterized by first finding it in its own variable range, and if not, it will look up along the scope.Such as:var a = 1;function B () { var a = 2; Function C () { var a = 3; Console.log (a); } C ();}

What is open collector (OC )? What is open circuit (OD )? Why do I have to add a pulling resistance to the IO port output by the OC gate? What is push-pull output?

Copyright Disclaimer: During reprinting, please use hyperlinks to indicate the original source and author information of the article and this statementHttp://zhaoleijun.blogbus.com/logs/25227570.html What is open collector (OC )? Let's talk about the structure of open collector output. As shown in structure 1 of open collector output, the transistor on the right has no collector, so it

What is a URI and what is a URL? What is the relationship between the two?

  1. What is a URI Each resource available on the Web-HTML documents, images, video clips, programs, and so on-is positioned by a generic resource identifier (Universal Resource Identifier, "URI"). A URI generally consists of three parts: The naming mechanism for accessing resources. Host name where the resource is

What is a system clock? What is a clock system? What is the function of the clock system?

1.Q: What is the system clock. What is a clock system. A: Usually referred to as the system clock refers to the clock system, which is the oscillator (signal source), timing wake-up, frequency divider and other components of the circuit. The commonly used signal sources are

In Java, what is OOA? What is Ood? What is OOP?

Note: This article comes from " what is Ooa in Java?" What is Ood? What is OOP? "In Java, what is OOA?

What is asymmetric encryption, what is a public key, what is a key

Encryption-Re-encodes the information in some way. Decryption-Restores the encoded information in some way.What is symmetric encryption and what is asymmetric encryption? Give me a chestnut:A send a message to B, in order to secure the transmission of information to be encrypted. There are two ways in which they1. Both A and B know how to encrypt information and

What is a break, what is capture, what is the difference between interruption and capture?

Interrupt:Interrupts caused by processor external events are called external interrupts, also known as interrupts. In x86, it is called an asynchronous interrupt, which is generated randomly with the CPU clock, and can occur in the execution of an instruction or after an instruction is executed. Includes I/O interrupts, external interrupts.Capture:Interrupts caus

What is fragmentation, the impact of fragmentation on Io, and what is physical order and what is logic

72057594040549376 in-row data 10 null 0 0 0 01 78 1 80 1298103665 1 1 72057594040549376 in-row data 1 0 1 90 0 01 89 1 80 1298103665 1 1 72057594040549376 in-row data 2 1 0 0 0 01 90 1 80 1298103665 1 72057594040549376 in-row data 1 0 0 1 78 Then their allocation in IAM is: Iam: single page allocations @ 0x00000000118ea08e Slot 0 = (1: 78) slot 1 = (1: 89) slot 2 = (1: 90)Slot 3 = (0: 0) slot 4 = (0: 0) slot 5 = (0: 0)Slot 6 = (0: 0) slot 7 = (0: 0)

In Java, what is OOA? What is Ood? What is OOP?

. Second, by abandoning individual things in the details of the differences, extracting their common characteristics and get a group of things abstract concept.Abstraction is the most widely used principle in object-oriented methods. Abstract principles include two aspects of process abstraction and data abstraction.Process abstraction means that any sequence of operations that completes a deterministic function can be viewed by the user as a single e

What is the pull current, what is the sink current? What is the absorption current?

http://bbs.elecfans.com/forum.php?mod=viewthreadtid=207422highlight=What is the pull current, what is the sink current? What is the absorption current?Pull current and sink current is t

What is cocoa? What is Xcode? What is the framework?

What is cocoa? What is Xcode? What is the framework? What is cocoa?Many libraries (libraries) and tools built into the NeXTSTEP (operating s

What is the employment rate of college students? What is the most useful thing for finding a job? What is the true story of postgraduate entrance exams?

Everything is different from the first to the fourth year. From the first to the fourth day, there is no such thing as a basket. The food is not so sweet, and the sleep is not so comfortable. How many people have troubles with work and nonsense.Http://bbs.sei.ynu.edu.cn/viewthread.php? Tid = 27480 extra = Page % 3d8 M

What is a scripting language? What is a compilation language? What is the difference between the two ?, Script language compilation

What is a scripting language? What is a compilation language? What is the difference between the two ?, Script language compilation What is

What is an XSS attack? What is a SQL injection attack? What is a csrf attack?

verification code is a bad user experience, not necessary to not easily use the verification code, many of the current practice is that if a short period of time to submit a form is not successful after the request to provide a verification code, This will get a better user experience. Add: Firewall is an imp

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