Creating and Maintaining Home Networks
Overview

http://edu-observatory.org/olli/Networks/Overview.html



OVERVIEW

Wikipedia: Internet (WAN)
  https://en.wikipedia.org/wiki/Internet

  The Internet (or just internet) is the global system of
  interconnected computer networks that uses the Internet
  protocol suite (TCP/IP) to communicate between networks and
  devices. It is a network of networks that consists of
  private, public, academic, business, and government networks
  of local to global scope, linked by a broad array of
  electronic, wireless, and optical networking technologies.

  The Internet carries a vast range of information resources
  and services, such as the inter-linked hypertext documents
  and applications of the World Wide Web (WWW), electronic
  mail, telephony, and file sharing.


Wikipedia: Default Gateway (Router)
  https://en.wikipedia.org/wiki/Default_gateway
  
  A default gateway is the node in a computer network using
  the internet protocol suite that serves as the forwarding
  host (router) to other networks when no other route
  specification matches the destination IP address of a
  packet.

  A gateway is a network node that serves as an access point
  to another network, often involving not only a change of
  addressing, but also a different networking technology. More
  narrowly defined, a router merely forwards packets between
  networks with different network prefixes. The networking
  software stack of each computer contains a routing table
  that specifies which interface is used for transmission and
  which router on the network is responsible for forwarding to
  a specific set of addresses. If none of these forwarding
  rules is appropriate for a given destination address, the
  default gateway is chosen as the router of last resort. The
  default gateway can be specified by the route command to
  configure the node's routing table and default route.

  In a home or small office environment, the default gateway
  is a device, such as a DSL router or cable router, that
  connects the local network to the Internet. It serves as the
  default gateway for all network devices.


Wikipedia: Local Area Network (LAN)
  https://en.wikipedia.org/wiki/Local_area_network

  A Local Area Network (LAN) is a computer network that
  interconnects phones, tablets, computers, (and other 
  devices that people connect to the internet) within a 
  limited area such as a residence, school, laboratory,
  university campus or office building. Ethernet and Wi-Fi are
  the two most common technologies in use for local area
  networks.

  
  

 
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