Computer Information Technology If you are an expert in computers

1 The search engine automatic information search function is divided into two kinds: one is regular search, that is, every once in a while (Google is generally 28 days), the search engine takes the initiative to send out a "spider" program to retrieve the Internet within the address range of a certain IP, once a new ** is found, he will automatically extract ** information and** add to his top database: the other is to submit **search, that is** the owner actively submits ** to the search engine**, which is oriented to a certain ** within a certain period of time (ranging from 2 days to several months) Send out the "spider" program, scan** and store the relevant information in the database, in case of user query, due to a lot of changes in the search engine rules this year, actively submitting **does not guarantee your**can enter the search engine database, so the best way now is to get some external links, so that the search engine has more opportunities to find you and automatically include you**.

When the user uses keywords to query information, the search engine will search in the database, if it finds the content that matches the customer's requirements, it will take a special algorithm - usually according to the matching degree of the keywords in the web page, the frequency of the position, the quality of the link - to calculate the relevance and ranking level of the web page, and then according to the degree of relevance, these web links will be returned to the user in order.

2 Directory index, although it has a search function, we are not a real search engine in the strict sense, it can be said to be a directory or list of **links classified by directory. Users can find the information they need without searching for keywords and just by category. It is characterized by accurate classification.

3 The principle of snapshot, the process of organizing and processing the data on the network by the internal search program of the search engine, and the specific embodiment of the index storage of file data is the snapshot. Generally speaking, the process of obtaining data is to distribute spiders to obtain data through links to each other throughout the Internet; The snapshot is the data storage of the homepage or a single page when the spider arrives at a new ** or a single page through a certain link; The internal mechanism will classify the data according to the specific algorithm, and the user will see the snapshot when retrieving the cached data indexed in the database server.

Study your own and don't be opportunistic.

Yes! Eh, Brother Tai, you should post to the survey**, so that the information comes faster!

3.All technologies related to the acquisition, processing, storage, transmission and utilization of information in the middle limbs can be called information technology.

4.Information technology includes microelectronic technology, sensing technology, computer technology, communication technology, etc.

The first is the use of language; the second is the use of the word Wen Ge Shi; the third is the application of printing training technology; the fourth is the invention and popularization of telegraph, radio, and television; The fifth is the popularization and application of computers and the combination of computers and modern communication technology.