QUESTION`S .
☻what are the advantage and distadvantage of using search engines ?
Using search engines does involve a learning curve. Many beginning Internet users, because of these disadvantages, become discouraged and frustrated.
☻compare and contrast individual search engines and search metasearch engines?
Search engines obtain their data from information contained on individual web pages. This information can be gathered manually or automatically by programs commonly called spiders or crawlers….. some search engines use a combination of both. Once the data has been collected it is added to an index which is simply a huge database.
When you enter a keyword or phrase into a search engine, an integrated piece of software searches the index database to retrieve the relevant data. Even though these advanced spider and crawler programs work at lightning speed,
☻when it is appropriate to use a search engine? when its appropriate to use a search /subject directory?
Subject Directories tell us what is available by subject and where to find it. Also called Subject Trees, Subject Indexes, Web Catalogues or Web Guides, they provide a hierarchical view of subject categories. Like the subject catalogue in the library, they are usually the work of people, often expert in the subject area, who can evaluate the content of an Internet site and classify it.
☻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,[1] 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?
The "visible web" is what you can find using general web search engines. It's also what you see in almost all subject directories. The "invisible web" is what you cannot find using these types of tools.
☻why are these web pages now available on search engines or subject directories?
The exact number of webpages on the Internet is unknown, but a July 2000 study by the Internet Software Consortium put the number of domain names — such as beyondbooks.com or nasa.gov — at nearly 100,000,000. The search engine Google now claims to sift through more than one billion webpages. In addition to the sheer vastness of the Web, its pages appear and disappear daily. Nor is the Web arranged in any alphabetical, chronological, logical, or rational order. There is no centralized registration for pages, and there is no cataloging similar to that in a library.
Biyernes, Hulyo 15, 2011
Biyernes, Hulyo 1, 2011
activity 2. the internet
1.)Write a short essay (250 words) on the "Impact of the Internet in our world today"
The Internet drives the hottest stocks on Wall Street, shapes technological innovation, and fills the pages of the world's presses. What does this mean for society, government, commerce, and other institutions? How will the way we live, work, learn, profit, govern, and communicate change ?
The Internet creates new ways for citizens to communicate, congregate, and share information of a social nature. It is obvious that the Internet has and will continue to change the way we live. How it is changed, and how it will continue to change our lives, is the reason for so many conferences on the topic. For example, the following is an abstract of a conference that took place:
2.)Give a brief desription of the following Internet organizations
a.ISOC-> The Internet Society (ISOC) is a nonprofit organisation founded in 1992 to provide leadership in Internet related standards, education, and policy.
b.IAB -> Global nonprofit group open to companies actively engaged in the sale of interactive advertising and marketing. Membership features IAB events, ...
c. ISEG -> Manufacturers of high voltage power supplies for industry and research applications.
d. IRTF -> Internet Research Task Force, a research organization working on topics related to the evolution of the Internet; NASA Infrared Telescope ...
e. IETF -> Internet engineering task force develops and promotes Internet standards, cooperating closely with the W3C and ISO/IEC standards bodies and ...
f. IANA -> Internet assigned numbers Authority ontrols numbers for protocols, the Country Code Top Level Domains and maintains the IP Address allotments.
g.InterNIC -> the internet network information center The Internet Network Information Center, known as InterNIC, was the Internet governing body primarily responsible for domain name and IP address allocations
h. ICANN -> internet corporation for assigned name and numbers The Internet Corporation for Assigned Names and Numbers (ICANN) is the private sector, non-profit corporation created in 1998 to assume ...
3.)Arrange the organizations in chronological order
4.)After watching the video on how the Internet works, answer the following questions
5.)What made the internet reliable and efficient?
Engineering a Reliable and Efficient Internet: Priority Scheduling, Congestion .... But effective congestion control, including priority routing can make the work easy .
6.)What principles applied in the Internet that could also be beneficial in other areas? The other set of arguments for free trade could be classified as "moral" arguments ... is assumed to be beneficial (ex ante) to the parties involved (why else ... world's production possibilities frontier, vector addition must be used
7.) In your own words, explain the TCP/IP Protocol Suite (Internet Model). Minimum of 250 words, 500 maximum. n this chapter, we will take a look at the TCP/IP protocol stack to ... List the layers in the OSI and DoD networking models. Describe the .... Used by your machine to connect to a remote host and use its services. ... Specifies the Internet address of the interface that owns the cache to be viewed or modified. ...
The Internet drives the hottest stocks on Wall Street, shapes technological innovation, and fills the pages of the world's presses. What does this mean for society, government, commerce, and other institutions? How will the way we live, work, learn, profit, govern, and communicate change ?
The Internet creates new ways for citizens to communicate, congregate, and share information of a social nature. It is obvious that the Internet has and will continue to change the way we live. How it is changed, and how it will continue to change our lives, is the reason for so many conferences on the topic. For example, the following is an abstract of a conference that took place:
2.)Give a brief desription of the following Internet organizations
a.ISOC-> The Internet Society (ISOC) is a nonprofit organisation founded in 1992 to provide leadership in Internet related standards, education, and policy.
b.IAB -> Global nonprofit group open to companies actively engaged in the sale of interactive advertising and marketing. Membership features IAB events, ...
c. ISEG -> Manufacturers of high voltage power supplies for industry and research applications.
d. IRTF -> Internet Research Task Force, a research organization working on topics related to the evolution of the Internet; NASA Infrared Telescope ...
e. IETF -> Internet engineering task force develops and promotes Internet standards, cooperating closely with the W3C and ISO/IEC standards bodies and ...
f. IANA -> Internet assigned numbers Authority ontrols numbers for protocols, the Country Code Top Level Domains and maintains the IP Address allotments.
g.InterNIC -> the internet network information center The Internet Network Information Center, known as InterNIC, was the Internet governing body primarily responsible for domain name and IP address allocations
h. ICANN -> internet corporation for assigned name and numbers The Internet Corporation for Assigned Names and Numbers (ICANN) is the private sector, non-profit corporation created in 1998 to assume ...
3.)Arrange the organizations in chronological order
4.)After watching the video on how the Internet works, answer the following questions
5.)What made the internet reliable and efficient?
Engineering a Reliable and Efficient Internet: Priority Scheduling, Congestion .... But effective congestion control, including priority routing can make the work easy .
6.)What principles applied in the Internet that could also be beneficial in other areas? The other set of arguments for free trade could be classified as "moral" arguments ... is assumed to be beneficial (ex ante) to the parties involved (why else ... world's production possibilities frontier, vector addition must be used
7.) In your own words, explain the TCP/IP Protocol Suite (Internet Model). Minimum of 250 words, 500 maximum. n this chapter, we will take a look at the TCP/IP protocol stack to ... List the layers in the OSI and DoD networking models. Describe the .... Used by your machine to connect to a remote host and use its services. ... Specifies the Internet address of the interface that owns the cache to be viewed or modified. ...
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