Thursday, January 5, 2012

What is Computer Network?

Network
           A network is a collection of independent computers that communicates with each other over a shared network medium usually a cale or wire, although wireless communication  can also be used between networked computers and peripherals like bluetooth and wi-fi were also available.

Computer Network
            A computer network is a collection of more than two or more connected computers. Through a computer network, computers were joined in a network. The users of a computer can share files with each other and others peripherals such as modem, printers, tape backup drives, or CD-ROM drives.

Types of Networks:

LAN (Local Area Networks)

LAN or Local Area Networks are networks usually confined to a geographic area, such as a single building or a college campus. LAN can be small, linking as few as three computers, but often link hundreds of computers used by thousands of people.



WAN (Wide Area Networks)

WAN or Wide area networking combines multiple LANs that are geographically separate. This is accomplished by connecting the different LANs using services such as dedicated leased phone lines, dial-up phone lines , satellite links, and data packet carrier services. Wide area networking can be as simple as a modem and remote access server for employees to dial into, or it can be as complex as hundreds of branch offices globally linked using special routing protocols and filters to minimize the expense of sending data sent over vast distances.


WLAN (Wireless Local Area Network)

           WLAN or Wireless Local Area Network links two or more devices using some wireless distribution method , and usually providing a connection through an access point to the wider internet. This gives users the mobility to move around within a local coverage area and still be connected to the network. Wi-fi is the best example for this.

MAN (Metropolitan Area Network)
          MAN or Metropolitan Area Network  usually spans a city or a large campus. A MAN usually interconnects a number of local area networks (LANs) using a high-capacity backbone technology, such as fiber-optical links, and provides up-link services to wide area networks (or WAN) and the Internet.


CAN (Campus Area Network)
           CAN or Campus Area Network  interconnects a few local area networks (LAN) within a university campus or corporate campus.


 PAN (Personal Area Network)
           A personal area network (PAN) is the interconnection of information technology devices within the range of an individual person, typically within a range of 10 meters. For example, a person traveling with a laptop, a personal digital assistant (PDA), and a portable printer could interconnect them without having to plug anything in, using some form of wirelesstechnology. Typically, this kind of personal area network could also be interconnected without wires to the Internet or other networks.

Tuesday, December 6, 2011

Hello!

       Philippines is a tropical country located at Southeast Asia in the Western Pacific Ocan. To its north across the Luzon Strait lies Taiwan. West across the South China Sea sits Vietnam. The Sulu Sea to the southwest lies between the country and the island of Borneo, and to the south the Celebes Sea separates it from other islands of Indonesia. See map of the Philippines. It is bounded on the east by the Philippine Sea.

         Its tropical climate make the Philippines prone to earthquakes and typhoons but have also endowed the country with natural resources and made it one of the richest areas of biodiversity in the world. An archipelago comprising 7,107 islands, the Philippines is categorized broadly into three main geographical divisions: Luzon, Visayas, and Mindanao. Its capital city is Manila.

         The arrival of Ferdinand Magellan in 1521 marked the beginning of an era of Spanish interest and eventual dominance. In 1543, Spanish explorer Ruy López de Villalobos named the archipelago Las Islas Filipinas in honor of Philip II of Spain. Miguel López de Legazpi arrived in the Philippines in 1565 and consolidated Spanish rule in the islands, which remained a colony of Spain for more than 300 years.

          Manila became the Asian hub of the Manila–Acapulco galleon fleet. Christianity was widely adopted. As the 19th century gave way to the 20th, there followed in quick succession the Philippine Revolution which spawned the short-lived First Philippine Republic, the Spanish-American War, and the Philippine–American War. In the aftermath, the United States emerged as the dominant power. Aside from the period of Japanese occupation, the United States retained sovereignty over the islands until the end of World War II when the Philippines gained independence. The United States bequeathed to the Philippines the English language and a stronger affinity for Western culture. Since independence the Philippines has had an often tumultuous experience with democracy, with popular "People Power" movements overthrowing a dictatorship in one instance but also underlining the institutional weaknesses of its constitutional republic in others.
    
            This will give you the Information about natural landscapes, the climate, tropical animals and tropical fruit & vegetables in the Philippines.  Special attention for the volcanoes the Pinatubo and Mount Mayon, the danger of the typhoons and the advantages of Geo-energy. The housing, means of transportation and economic activities on markets and other places, will show you the way of living in this beautifull tropical country.