What is a network?

   In our present life everything connecting to network. Example, we use a network at home, school, office, banks, hospitals, workplace and more many place. There are several different types of computer networks. Computer network can be characterized by their size as well as their purpose.

Some of the different networks based on size are:

• Personal area network or PAN
• Local area network or LAN
• Metropolitan area network or MAN
• Wide area network or WAN

Some of the different networks based on their main purpose are:

• Storage area network or SAN
• Enterprise private network or EPN
• Virtual private network or VPN

Network is so big perception. Therefore now i am writing about Social network.

Everyone is talking about Social network and they visiting some social sites are a part of their daily routine. Facebook , Yahoo messenger, Twitter, Instagram and youtube all come to my mind when someone says social network. Social network allow people to keep and manage accounts.

Communication has been instrumental to a large extent to the increases of social network. As a result communication has grown. It is now easier and cheap to communicate and connect with people across the worls. In my opinion, social network sites are relationship between people. In the past, due to geographical distances and economic concerns, connections between people were limited. Rathe 

r now, Everybody have a mobile phone that connect with people across the world. Social network can be used to share photos, video and more with people you know such as family and friends.

But everything has two sides. The impact of social networks is bad significant. Especially, teens spent most time of the day on social network. While it is a way to connect with others, there are that is isolate themselves from others. Many people tend to forget that real life is fun. But nowadays, we cannot imagine our life without social network.