what is difference ipv4 and ipv6

requires timeliness. It takes tens of seconds for the customer to save a sum of money, which requires the database to store data for a short period of time. The analysis system is post-event. It must provide all valid data within the specified time period. The data is massive, and the aggregation and calculation are slower. However, as long as the data can be effectively analyzed, the goal

available to any HTML element. Document is required when you need to use js to obtain non-form Element objects. getelementbyidx ("ID") can be said that almost everyone who has done Web development has asked, What is the difference between the element ID and name? Why do I have an ID and a name ?! We can also get the m

What is the difference between using float and position in CSS?Well, in fact, this proposition is wrong, only position is the location, float can not be said to be positioning, but you can say that the two layout methods are different.There

What is the difference between a server and a normal computer? Common 1U Servers What is a server? First we look at the professional server is how to define, the server is a high-p

What is the difference between the exec function and the shell_exec function in PHP? execshell_exec Both of these functions execute Linux Command functions. The difference is that the returned results are different. exec can only obtain the last row of data, while shell_exec

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What is the difference between WLAN and WiFi? What is a WLAN? What is WiFi? There may be a lot of children's shoes do not know their differences, here to give you a detailed introductio

What is the difference between urllib and urllib2 modules of python? You might be intrigued by the existence of two separate URL modules in Python-UrllibAndUrllib2. Even more intriguing: they are not alternatives for each other. So what is the differenceUrllibAndUrllib2, A

AMD and inteCPU is not just L2The main difference is thatLet's take a look .----------------------------------------------------- The CPU processing performance should not be viewedClock speed, while Intel isIs based on a considerable numberPeople do not know about CPU,The practice of using a longer PipelineTo increase the frequency, thus misleadingA considerable

What is the difference between fgetc, fputc, getc, and putc in C language? getcputc When I was reading a book, I found these four functions and wanted to know their differences. Results online query found that many people said that fgetc, fputc f Represents file, which is the two functions related to the file! But thei

Often see network friends in the difference between the switch and router, in fact, if you have used both switch and router friends should know, for everyone, switch and router use the biggest difference is that the router can realize dial-up internet access, and then shared to multiple computers at the same time the Internet, But the switch does not have the dia

Speaking of how to tell ListAnd python tuples, let's start by introducing what is python tuples： Say so much, so what is a python tuple ? A python tuple is similar to a list, except that the elements of a tuple cannot be modified, tuples use parentheses, and the list uses

What is the difference between the COOKIE sent by the browser's HTTP request and the COOKIE planted by the PHPsetcookie function? Can the two cookies be viewed in the browser-> webpage information-> website COOKIE display? What is the di