Activity4

Activity4

Questions:

->>>What are the advantages of using search engines??
>>>Search engines provide some popular ways of finding information on the Internet. There is a wide variety of search engines and features. Some search engines are on specific websites, allowing visitors to the site to search for specific words or phrases. Others are broader in scope.

->>> What are the disadvantages of using search engines??
>>> Regardless of the growing sophistication, many well thought-out search phrases produce list after list of irrelevant web pages. The typical search still requires sifting through dirt to find the gems.

->>>Compare and contrast individual search engines and search mete search engines.>>> Though there are dozens of useful meta search engines, Info Space is the industry gorilla, operating the four arguably best known and most heavily used properties. Dog pile and Met crawler are the two best known Info Space meta search engines. Less well known is that Info Space purchased the Excite and WebCrawler properties when Excite failed, and quietly re-engineered their back ends as meta search engines. In the past, Search Engine Watch has been critical of the Info Space services (see "Meta Search or Meta Ads" below). But the company has overhauled its business model during the past six months, and has renewed its commitment to providing quality search results.

->>>When is it appropriate to use a search engine?
>>> A web search engine is designed to search for information on the World Wide Web and FTP servers. The search results are generally presented in a list of results and are often called hits. The information may consist of web pages, images, information and other types of files. Some search engines also mine data available in databases or ope directories. Unlike web directories, which are maintained by human editors, search engines operate algorithmically or are a mixture of algorithmic and human input.

Question3

->>>What is an invisible Web or “Deep Web”?>>> The Deep Web (also called Deepnet, the invisible Web, DarkNet, Undernet, or the hidden Web) refers to World Wide Web content that is not part of the Surface Web, which is indexed by standard search engines. Mike Bergman, credited with coining the phrase, has said that searching on the Internet today can be compared to dragging a net across the surface of the ocean: a great deal may be caught in the net, but there is a wealth of information that is deep and therefore missed. Most of the Web's information is buried far down on dynamically generated sites, and standard search engines do not find it. Traditional search engines cannot "see" or retrieve content in the deep Web – those pages do not exist until they are created dynamically as the result of a specific search. The deep Web is several orders of magnitude larger than the surface Web
->>>How do you find an Invisible Web?
>>> Is it some kind of Area 52-ish, X-Files deal that only those with stamped numbers on their foreheads can access? Well, not exactly. The term "invisible web" mainly refers to the vast repository of information that search engines and directories don't have direct access to, like databases. Unlike pages on the visible Web (that is, the Web that you can access from search engines and directories), information in databases is generally inaccessible to the software spiders and crawlers that create search engine indexes.