Computer Networks - A computer network or data network is a telecommunications network that allows computers to exchange data. In computer networks, networked computing devices pass data to each other along data connections. The connections (network links) between nodes are established using either cable media or wireless media. The best-known computer network is the Internet.

Different Types of Networks:

LAN(Local Area Networking)

WLAN(Wireless Local Area Networks)

WAN(Wide Area Networks)

MAN(Metropolitan Area Networks)

CAN(Campus Area Networks)

SAN(Storage or Sytem Area Network)

PAN(Personal Area Network)

Dan(Desk Area Network)

Kinds of Topology:

BUS- All the devices on a bus topology are connected by one single cable.

STAR-All the cables run from the computers to a central location, where they are all connected by a device called a hub.

RING-Each computer is connected to the next computer ,with the last one connected to the first. Every computer is connected to the next computer in the ring, and each retransmits what it receives from the previous computer.

MESH-The mesh topology connects all devices (nodes) to each other for redundancy and fault tolerance. It is used in WANs to interconnect LANs and for mission critical networks like those used by banks and financial institutions. 

Types of Cabling:

• Unshielded Twisted Pair (UTP) Cable
• Shielded Twisted Pair (STP) Cable
• Coaxial Cable
• Fiber Optic Cable
• Cable Installation Guides
• Wireless LANs
• Unshielded Twisted Pair (UTP) Cable

Steve Jobs-

 Steven Paul "Steve" Jobs was an American entrepreneur, marketer, and inventor, who was the co-founder, chairman, and CEO of Apple Inc. Through Apple, he is widely recognized as a charismatic pioneer of the personal computer revolution and for his influential career in the computer and consumer electronics fields, transforming “one industry after another, from computers and smartphones to music and movies.” Jobs also co-founded and served as chief executive of Pixar Animation Studios; he became a member of the board of directors of The Walt Disney Company in 2006, when Disney acquired Pixar. Jobs was among the first to see the commercial potential of Xerox PARC's mouse-driven graphical user interface, which led to the creation of the Apple Lisa and, a year later, the Macintosh. He also played a role in introducing the LaserWriter, one of the first widely available laser printers, to the market.

Bill Gates

William Henry "Bill" Gates III is an American business magnate, philanthropist, investor, computer programmer, and inventor. Gates is the former chief executive and chairman of Microsoft, the world’s largest personal-computer software company, which he co-founded with Paul Allen.

He is consistently ranked in the Forbes list of the world's wealthiest people and was the wealthiest overall from 1995 to 2009—excluding 2008, when he was ranked third; in 2011 he was the wealthiest American and the world's second wealthiest person.According to the Bloomberg Billionaires List, Gates became the world's richest person again in May 2013, a position that he last held on the list in 2007.As of June 2014, he is still the richest.

Mark Zuckerberg

Mark Elliot Zuckerberg is an American computer programmer, Internet entrepreneur, and philanthropist. He is best known as one of five co-founders of the social networking website Facebook. As of April 2013, Zuckerberg is the chairman and chief executive of Facebook, Inc.and his personal wealth, as of April 2014, is estimated to be $25.3 billion. Mark Zuckerberg receives a one-dollar salary as CEO of Facebook.