2021 Unit 2 Key Words

	A	B	C
1		Write key words in Interactive Notebook glossary
2		Key Word	Definition
3	1	Computing Device	a machine that can run a program, including computers, tablets, servers, routers, and smart sensors
4	2	Computing System	a group of computing devices and programs working together for a common purpose
5	3	Computing Network	a group of interconnected computing devices capable of sending or receiving data
6	4	Path	the series of connections between computing devices on a network starting with a sender and ending with a receiver
7	5	Bandwidth	the maximum amount of data that can be sent in a fixed amount of time, usually measured in bits per second
8	6	Protocol	An agreed-upon set of rules that specify the behavior of some system
9	7	IP Address	The unique number assigned to each device on the Internet.
10	8	Internet Protocol (IP)	a protocol for sending data across the Internet that assigns unique numbers (IP addresses) to each connected device
11	9	Router	A type of computer that forwards data across a network
12	10	Redundancy	the inclusion of extra components so that a system can continue to work even if individual components fail, for example by having more than one path between any two connected devices in a network.
13	11	Fault Tolerant	Can continue to function even in the event of individual component failures. This is important because elements of complex systems like a computer network fail at unexpected times, often in groups.
14	12	Datastream	Information passed through the internet in packets.
15	13	Packet	A chunk of data sent over a network. Larger messages are divided into packets that may arrive at the destination in order, out-of-order, or not at all.
16	14	Packet Metadata	Data added to packets to help route them through the network and reassemble the original message.
17	15	Transmission Control Protocol (TCP)	A protocol for sending packets that does error-checking to ensure all packets are received and properly ordered
18	16	User Datagram Protocol (UDP)	A protocol for sending packets quickly with minimal error-checking and no resending of dropped packets
19	17	Scalability	the capacity for the system to change in size and scale to meet new demands
20	18	The Domain Name System (DNS)	the system responsible for translating domain names like example.com into IP addresses
21	19	World Wide Web	a system of linked pages, programs, and files
22	20	Hypertext Transfer Protocol (HTTP)	a protocol for computers to request and share the pages that make up the world wide web on the Internet
23	21	Latency	The time it takes for a bit to travel from one place to another.
24	22	Bitrate	how bandwidth is measured, usually in bits per second
25		Notes from class:	The World Wide Web is different from the Internet. The World Wide Web are files, web pages and media. The Internet is the network we use to access those files. The DNS is an important system in helping the Internet scale.
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