what is difference between ipv4 and ipv6

I know the difference between string and stringbuilder,Every time a string is modified, a new string is created. Deleting the old string will affect the efficiency, while stringbuilder operates at the end of the string, which is faster than string,In small databases, string and stringbuilder have no major impact, but i

(1) What is the difference between single and double quotation marks?1, can be used to escape the range, the single quotation mark can only escape the single quotation mark \ ', double quotation marks except single quotation mark cannot escape, other \ "\n\r\t can.2, double quotation mark can parse PHP variable, single quotation mark cannot. That

(1) What is the difference between single and double quotation marks? 1, can be used to escape the range, the single quotation mark can only escape the single quotation mark \ ', double quotation marks except single quotation mark cannot escape, other \ "\n\r\t can. 2, double quotation mark can parse PHP variable, single quotation mark cannot. That

DCS--distribution control system decentralized controls, plant control level systems, conventional data acquisition, device controlThis system is completed.Sis--safty Instruments System Security instrumentation systems, interlock system, generally do the plant process equipment safety protection control, sometimes also includes the unit safety protection control.What is the

local monitor. This is why many people don't understand that X is a protocol. What is the relationship between X and X11R6? Don't know if beginners have noticed/usr/x11r6 this directory, which is the default installation directory for Xfree X11R6

SSH project, what is the difference between using gethibernatetemplate and getsession? What are the pros and cons, thanks for the answer!Reward Points: 0-resolution Time: 2008-10-7 09:42SSH project, what is the

With the development of smartphones, whether it is to look at mobile phone configuration or often in life and the network often hear people talk about some words. For example, mobile phone ram how much or ROM how many and so on. It may be known that the bigger the ROM or RAM, the better, but what the meaning of ROM and ram is and the

Difference between type parameter " To discuss " First, declare a generic class or generic method. Second, use a generic class or generic method. The type parameter "The unbounded wildcard " In layman's parlance, "T" is what is declared when a class or method is defined

There's a difference. The /lib gives a library file of the root and the kernel required so or a, and/usr/lib is available to ordinary users. There are two modes of Linux program, which you should know, is User mode and kernel mode, and this is also related to, no longer redundant. differences between ================

HTML files are displayed through CSS styles, that is, the page content is displayed in combination with XHTML and CSS. So what methods are there to introduce CSS styles into the XHTML file? I. inline reference CSS Add the style attribute directly to individual component labels. For example:No worries about templates-www.mb5u.com Advantages of this method: the lab