Default gateway

A gateway is a node (a router) on a computer network that serves as an access point to another network.
A Default Gateway (Def.GW) is the node on the computer network that is chosen when the IP address does not belong to any other entities in the Routing Table.
In homes, the gateway is usually the ISP-provided device that connects the user to the Internet, such as a DSL or cable modem.
In enterprises, however, the gateway is the node that routes the traffic from a workstation to another network segment. The default gateway is commonly used to be the node connecting the internal networks and the outside network (Internet). In such a situation, the gateway node could act as a proxy server and a firewall. The gateway is also associated with both a router, which uses headers and forwarding tables to determine where packets are sent, and a switch, which provides the actual path for the packet in and out of the gateway.
In other words, it is an entry point and an exit point in a network.
Usage
A default gateway is used by a host when an IP packet's destination address belongs to someplace outside the local subnet (thus requiring more than one hop of Ethernet communication). The default gateway address is usually an interface belonging to the LAN's border router.

WWW - World Wide Web

Definition: The term WWW refers to the World Wide Web or simply the Web. The World Wide Web consists of all the public Web sites connected to the Internet worldwide, including the client devices (such as computers and cell phones) that access Web content. The WWW is just one of many applications of the Internet and computer networks.
The World Web is based on these technologies:
• HTML - Hypertext Markup Language
• HTTP - Hypertext Transfer Protocol
• Web servers and Web browsers
Researcher Tim Berners-Lee led the development of the original World Wide Web in the late 1980s and early 1990s. He helped build prototypes of the above Web technologies and coined the term WWW. Web sites and Web browsing exploded in popularity during the mid-1990s.
Also Known As: World Wide Web, The Web

Who Created the Internet Network?

Development of the technologies that became the Internet began decades ago. The development of the World Wide Web (WWW) portion of the Internet happened much later, although many people consider this synonymous with creating the Internet itself.
Answer: No single person or organization created the modern Internet, including Al Gore, Lyndon Johnson, or any other individual. Instead, multiple people developed the key technologies that later grew to become the Internet:
• Email - Long before the World Wide Web, email was the dominant communication method on the Internet. Ray Tomlinson developed in 1971 the first email system that worked over the early Internet.
• Ethernet - The physical communication technology underlying the Internet, Ethernet was created by Robert Metcalfe and David Boggs in 1973.
• TCP/IP - In May, 1974, the Institute of Electrical and Electronic Engineers (IEEE) published a paper titled "A Protocol for Packet Network Interconnection." The paper's authors - Vinton Cerf and Robert Kahn - described a protocol called TCP that incorporated both connection-oriented and datagram services. This protocol later became known as TCP/IP.