Unit 3 – Networks

links things together

links devices so that data and information can be shared among them

Personal Area Network - connects smart devices or consumer electronics within a range of about 30 feet

Local Area Network - data communication networks that connect personal computers within a very limited geographical area

Wide Area Network - covers a large geographical area and usually consist of several smaller networks that connect different computers on a variety of platforms.

the medium used to transport information from one network device to another

transport data through wires and cables

transport data from one device to another without the use of cables or wires

Radio waves - typically used for bluetooth devices

another option for transporting data wirelessly, but can be aimed in a single direction

is the transmission capacity of a communication channel

refers to the structure and layout of network components such as computers, connecting cables, and wireless signal paths Example: Point to Point, Star, Mesh, and Bus

any device on a network

Data Terminal Equipment - any device on a network

a device that controls the flow of data within a network

contains circuitry that converts the data-carrying signals from a digital device to signals that can travel over other communication channels

a set of rules for efficiently transmitting data from one network node to another

2 devices on a network negotiating their communication protocols

networks that use more one set protocols

created in 1969, connected computers at UCLA, the Stanford Research Institute, the University of Utah and the University of California at Santa Barbara

a set of shared protocols, procedures, and technologies that evolve through common agreement among network providers

the organization that supervises Internet addressing

the way networks fit together

Such as At&t, CenturyLink, and Verizon who own and maintain millions of dollars data communication equipment

Such as Comcast and Merit, pay a fee to connect to Tier 1 networks

Such as Midwest Cellular, Business Networks, Home Networks, and Education Institutions - end user who pays fees for connection services

is a parcel of data that is sent across a computer network

establishes a dedicated private link between one telephone and another for the duration of the call

divides a message into several packets that can be routed independently to their destination.

Internet Protocol version 4 - uses 32 bit addresses

Internet Protocol version 6 - uses 128 bits for each addresses

is an identifiable name for a specific computer on a network often pronounced TCPIP

Devices who have a permanently assigned IP address

are temporarily assigned IP address, for when the device is turned "on".

easy to remember name for the IP address like nike.com

the mechanism for tracking domain names

servers that are scattered around the world that maintain lists of all domain names

the amount of data that can be transmitted in a specified time

is the elapsed time for data to make a round-trip from point A to point B

is a utility software designed to measure responsiveness

indicates how quickly data can reach a server and bounce back to you.

is a wired network technology deployed in 1976

a set of wireless networking technologies (designs consist of a mesh design or star configuration)

scrambles the data transmitted between wireless devices and then unscrambles the data on devices that have the encryption key

essentially a second network that you can configure on your LAN's router

allows files to be accessed from computer other than the one on which they are stored

is a setting that affects whether your computer can see other devices

specify how shared files can be used

file transfer protocol

is a file sharing protocol that distributes the role of a file serve across a collection of dispersed computers