lesson 1
Backbone: the large transmission lines that travel long distance.
l Checksum: a number that allows packet to be checked for errors when it is received.
l Computer network: often just called a network,
l Domain Name System: a system that assigns names to IP addresses.
l Header: information that is attached to an IP packet that gives information about the packet itself.
l Internet: is a collection of computer networks that communicate with each other using a common set of rules.
l Internet Corporation for Assigned Names and Numbers (ICANN):
l Internet Protocol (IP): the rules that define how data is routed over the internet.
l Internet Society (ISOC): the group that organizes the groups that are responsible for internet standards.
l IP address: an internet address.
l IP packet: a packet of data that can travel over the internet.
l Local area network (LAN): a network that typically spans only one building or a group of buildings in the same area.
l Name server: a computer that translate a named address into an IP address.
l Network:
l Packet: the small pieces of data that travel over a packet-switched network such as the internet.
l Packet-switched network: a network in which data is transmitted in small pieces called packets.
l Protocol: a set of rules that determine how communicate occurs.
l Router: a device that examines packets and decides the packets should take.
l Transmission Control Protocol (TCP): the rules that define how data is broken down into packets.
l World Wide Web Consortium (W3C): a group of people involved in the development of specifications and recommendations about