Protocol, An agreed-upon set of rules that specify the behavior of some system, IP Address:, The unique number assigned to each device on the Internet., Internet Protocol (IP):, a protocol for sending data across the Internet that assigns unique numbers (IP addresses) to each connected device, Computing Device, a machine that can run a program, including computers, tablets, servers, routers, and smart sensors, Computing System, a group of computing devices and programs working together for a common purpose, Computing Network, a group of interconnected computing devices capable of sending or receiving data., Path, he series of connections between computing devices on a network starting with a sender and ending with a receiver., Bandwidth, the maximum amount of data that can be sent in a fixed amount of time, usually measured in bits per second, Router, A type of computer that forwards data across a network, 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., 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., Datastream, Information passed through the internet in packets., 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., Packet Metadata:, Data added to packets to help route them through the network and reassemble the original message., Transmission Control Protocol, A protocol for sending packets that does error-checking to ensure all packets are received and properly ordered, User Datagram Protocol, A protocol for sending packets quickly with minimal error-checking and no resending of dropped packets, Scalability, the capacity for the system to change in size and scale to meet new demands, The Domain Name System (, the system responsible for translating domain names like example.com into IP addresses, World Wide Web:, a system of linked pages, programs, and files, Hypertext Transfer Protocol , a protocol for computers to request and share the pages that make up the world wide web on the Internet.

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