what is difference ipv4 and ipv6

What is the difference between mvc and mvvm ?, What is the difference between mvcmvvm? Source: https://segmentfault.com/q/1010000000534091? _ Ea = 178721 Model: Very simple, it is t

Recently in the development of a project, want to reference the bootstrap file, has been wrong, so want to study the next relative path and absolute path relationship, to see how they are different. What is an absolute path and a relative path? DIVCSS5 for everyone to introduce the basic knowledge of relative path and absolute path, function, usage and other knowledge. Relative path: The directory path tha

From: http://hi.baidu.com/%CA%B8%C8%D0/blog/item/7d3392f883d4ecd5b48f31dc.html 1. bool is the basic value type, and Boolean is the object. 2. bool is the alias of Boolean. bool is in C #, and Boolean is in. NET Framework. Out of curiosity about Boolean, I used reflecto

The essential difference is that the const value is determined during compilation, so it can only be specified through a constant expression during declaration. Static readonly calculates its value during running, so it can be assigned a value through a static constructor. Let's see if the following statements can be exchanged: 1. static readonly testclass te

In the C language, for definitions and declarations, perhaps we are very familiar with, but not necessarily really understand!Definition means: The definition is to create a (compiler) an object, to allocate a memory space for this object and name, that is, the name of the variable or object that we normally call, once this is a memory space match, then in the de

What is a project training course, and what is the difference between a professional course and what kind of person can learn the training course?

Programmer PHP What is the current PHP Programmer's job to do (I know is to do Web pages)? For example, what is the difference between a big company and a small company? Reply to discussion (solution) Large companies have the

variables accessed by the user, stored in the location of PHP (Session_dir) in the specified directory on the server;Cookie: Used to store continuous access to a page, is stored on the client, and is stored in the user win's temp directory for cookies.What is the GD library for?The GD library provides a range of APIs for working with images, using the GD library

1. Link labels belong to the XHTML category, while @ import is unique in css2.1. In addition to loading CSS, link labels can also do many other things, such as defining RSS and rel connection attributes. @ import can only load CSS. 2. the difference in the loading sequence is that when link loads CSS, It is a parall

Amp; lt ;? Php {code...}. What is the difference between php {code...} and above code that implements redirection with the header? session_start();if(isset($_SESSION['userId'],$_SESSION['name'],$_SESSION['rights'])){ echo " ";}else{ echo " ";} In the above Code, what is