what is dns cache poisoning

At least beyond my imagination. Details: http://aspalliance.com/251 To facilitate reading, I copied the full text: ASP. NET micro Caching: benefits of a one-second Cache AbstractWhen I start talking about caching, I imagine that contains people immediately stop listening, thinking "my situation requires up-to-the-minute data, so caching isn't an option ". consider the benefits of what I call 'micro caching

The first level cache is built inside the CPU and runs at the same speed as the CPU, which can effectively improve the running efficiency of the CPU. The greater the level of cache, the higher the efficiency of the CPU, but limited by the internal structure of the CPU, the capacity of the first cache

Wrote a function of generating a cache, what do you think is the problem? The way and style of writing code, evaluation Cacheidfunction Makethreecache ($ID) {$idArr = array (' diqu ' = = Array (' ID ', ' name ', '/cachediqu ', 3, 1, ' China ', '/1 . php ', "select * from Gk_common_diqu WHERE ' level ' =%d and upid= '%d '"), ' infocat ' = = Array (' id ', ' na

The free command in Linux will output:TotalUsed already in useFree IdleGKFX Shared MemoryBuffersCachedThe first four items are better understood, I will know what the meaning of a look. But buffer and cached I have been not very understanding, finally saw an article written in very detailed, so write down;·　　A buffer is something that have yet to being "written" to disk. ---buffer write

After so long, apc has not studied its code, and suddenly interested in its memory sharing method. apc is the memory cache of a client, all of its caches are stored locally on the web server. So I have the following questions: Is apc Memory Sharing Based on processes? If I use php-fpm... after so long, apc has not studied its code, and suddenly interested in its

Cache is integrated into the CPU and used as storage support for CPU operations. Because of the CPU chip area and cost, the cache is very small. The cache is usually only a few MB. The operation frequency of the

1. Operation and Maintenance responsibilities• Data cannot be lost• The website is running in the hour• Better User ExperienceWhat's the difference between 2.buffer and cache?Buffeer buffer data is written to memory in the buffer area write buffer ' write cache 'Cache buffer

Basic concepts In the hierarchical structure of a computer storage system, a high-speed, small-capacity memory between the central processing unit and the main memory. It forms a level of memory together with the main memory. The dispatch and transfer of information between the buffer memory and the main memory is automatically carried out by the hardware. Some machines even have a level two level three cache