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A cache<\/b> It is a type of auxiliary memory that can be recovered at high speed with a relatively small storage capacity. It is located between the central processing unit (CPU) and the main memory. It helps prevent hard drive access or complex recalculations by temporarily storing certain data and making it quickly available when needed. The cache stores a copy of the current request and reflects in a sense what is contained in the requested medium<\/b>.\n<\/p>\n

\"600x400-Cache-en-01.png\"<\/a>\n<\/p>\n

\nFunctioning<\/span>
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To allow efficient access, the most used parts of the program and the calculated data are cached and thus are available more quickly<\/b>. The cache acts as a buffer<\/b> between main memory and hard disk and allows certain threads to be handled more efficiently. Apart from this, the data that will be required soon can be loaded into the cache in advance by slow background memory and ready for use.\n<\/p>\n

The cache is divided into hierarchies that are designated by levels. This provides information about the position of the respective hierarchy in the data flow. A level 0 (L0) cache has a small storage capacity of a few bytes, which initially decouples the data flow at the central unit. The L1 and L2 caches are internal, while the Level 3 (L3) cache is a separate memory on the motherboard. Each cache level can query hits and misses<\/b>. If a current user data request is identical to what is already in the cache, it is successful and the current procedure can be handled using the cache. Otherwise, it is an error and the procedure needs to enter the hard disk under certain circumstances.\n<\/p>\n

\nApplication areas<\/span>
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Alongside the more popular memory caches, there are caches for floppy, CD and DVD drives. These storage devices employ a different conventional memory technology to temporarily store data. As for web apps, a cache is a buffer that temporarily stores data for a web<\/b>, forms or available media such as videos and images, so that this data does not need to be uploaded again when the resource is consulted again. Such caches are part of the software and use certain resources that the software requires nonetheless.\n<\/p>\n

The cache of a browser loads data that the user has already entered or that the server makes available, such as forms or videos. These data are also called Temporary files<\/b> because they are only temporarily cached. Cookies and user data, such as passwords, are also stored in a cache. There are appropriate instructions for each browser to clear the cache. You will find the necessary information on the internet.\n<\/p>\n

\nHow this applies to SEO<\/span>
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Even search engines like Google have a cache in which a kind of snapshot of the specific page is stored. This copy is stores on the servers themselves<\/b> from the search engine and can be retrieved again regardless of the current availability of the web portal through the cache. This can lead to legal problems and website operators should always be aware of this and inform themselves before registering the URL.\n<\/p>\n

Despite everything, Google's servers cannot make websites directly available and always in their latest version. Each retrieval of a web portal from the SERPs is an image that has been accumulated by Google crawlers at a specific time in order to store it in the index. What the user sees is a copy of the index site. US law covers this copy with the Fair Use Act. Nevertheless, there is an impractical loophole in German law. However, website authors should have a strong interest in appearing in Google search results lists, even if it consists of an image of the site from the Google index.\n<\/p>\n

\nWeb Links<\/span>
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