What is a blog?

A blog is a type of website where information like commentary, description, review, pictures, video is posted regularly and usually displayed in chronological order i.e. latest post on top. Each post is like a webpage and it usually has option of comments for visitors.
e.g. http://bigb.bigadda.com – is a personal blog by bollywood celebrity.
http://www.tech2.com – is a blog for reviews of gadgets like mobile phone, camera etc.

Types of search engines

There are different types of search engines.

1) Crawler / Spider or robot based search engines - Search engines like google and yahoo has their own spider or crawler software which automatically visits and collects data of different websites and this data gets included and indexed in search engine database . Each search engine has its own algorithm to have ranking of these websites and display the search results.

2) Search Directories - has categories and subcategories for listing the websites. One can submit his website to suitable category and then it is reviewed by human editors and then they decide the listing and ranking of the website. e.g. dmoz.org , dir.yahoo.com

3) Meta search engines - This type of search engines searches the major search engines like google, yahoo , ask.com , bing etc. simulatnously at a time and displays the combined result on search engine result page (SERP) . e.g. dogpile.com

4) Specialized search engines - These are search engines for specific niche area.
e.g. to search books we have books.google.com
To search blogs we have blogsearch.google.com
To search articles we have scholar.google.com

Sharing of Internet Connection

A single internet connection connected to one computer on a LAN can be shared with other computers in LAN. Sharing of Internet Connection is possible by using

1) Hardware - 1) ADSL/ DSL router with more than one port
- 2) Switch or Hub used for LAN

2) Software - 1) Operating systems like Windows 98 and windows XP support the internet connection sharing.

2) Proxy server software can be installed on machine having internet connection for sharing.
e.g. AnalogX

Types of Internet connection

Internet is wide area network throughout the world where user connected to internet can get the information from websites hosted on web servers or can use services like email, video, audio, voice chat etc.

Internet service providers are called ISPs

There are different types of internet connections available.
1. Dial up connection - Uses dial up modem and telephone line which can provide speed upto 56.6kbps.

2. Broadband connection - Uses ADSL or DSL router and copper wire telephone line coming from nearby telephone exchange. Can provide data transfer speed upto 2mbps or more. Voice and internet data transmission can work simultaneously with this technology. Many broadband connection uses CAT 5 or CAT 6 cable from nearby server to user PC.

3. ISDN - Integrated Services Digital Network

4. T1

5. T2

6. Wireless Internet

7. GPRS- General Packet Radio service - This type of internet is used in cellphones. Connection speed possible is in the range of 116kbps.