C.2.10 Explain why the effectiveness of a search engine is determined by the assumptions made when developing it. The search engine must serve up results that are relevant to what the users search for, Google used page rank , prior to that search engines just used title tags key word tags. These could be easily manipulated …
C.2.10 Explain why the effectiveness of a search engine is determined by ……. Read More »
C.2.8-9 Suggest how developers can create pages that appear more prominently in search engine results. Describe the different metrics used by search engines The process of making pages appear more prominently in search engine results is called SEO. There are many different techniques, considered in section C.2.11. This field is a big aspect of web …
C.2.7 Outline the purpose of web-indexing in search engines Search engines index websites in order to respond to search queries with relevant information as quick as possible. For this reason, it stores information about indexed web pages, e.g. keyword, title or descriptions, in its database. This way search engines can quickly identify pages relevant to …
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C.2.6 Discuss the use of parallel web-crawling Size of the web grows, increasing the time it would take to download pagesTo make this reasonable “it becomes imperative to parallelize the crawling process (Stanford)AdvantagesScalability: as the web grows a single process can not handle everything Multithreaded processing can solve the problemNetwork load dispersion: as the web …
C.2.5 Discuss the relationship between data in a meta tag and how it is accessed by a web-crawler Answer depends on different crawlers, but generally speaking:The title tag, not strictly a meta-tag, is what is shown in the results, through the indexerThe description meta-tag provides the indexer with a short description of the pageThe keywords …
C.2.4 Describe how a web-crawler functions A web crawler, also known as a web spider, web robot or simply bot, is a program that browses the web in a methodical and automated manner. For each page it finds, a copy is downloaded and indexed. In this process it extracts all links from the given page …
C.2.3 Outline the principles of searching algorithms used by search engines The most known search algorithms are PageRank and the HITS algorithm, but it is important to know that most search engines include various other factors as well, e.g.the time that a page has existedthe frequency of the search keywords on the pageother unknown factors …
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C.2.2 Distinguish between the surface web and the deep web Surface webThe surface web is the part of the web that can be reached by a search engine. For this, pages need to be static and fixed, so that they can be reached through links from other sites on the surface web. They also need …
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C.2.1 Define the term search engine “A web search engine is a software system that is designed to search for information on the World Wide Web. The search results are generally presented in a line of results often referred to as search engine results pages (SERPs). The information may be a mix of web pages, …
C.1.3 HTTP(S), HTML, URL, XML, XSLT, JS & CSS HTTP – Hypertext Transfer ProtocolApplication layer protocol from the Internet Protocol suite to transfer and exchange hypermediarequest-response protocol based on client-server modeluser agent (e.g. web browser) requests some resource from a server through an URL, and the web server gives and responsedifferent HTTP request methods, e.g. …