AP Computer Science Principles - Unit 2

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 Networks

a group of interconnected computing devices capable of sending or receiving data

Path

series of connections between computing devices on a network starting with a sender and ending with a receiver

Protocol

a set of rules

Internet

a worldwide system of networks; a network of networks in which users at any one computer can, if they have permission, get info from any other computer

Fault Tolerance

the property that enables a system to continue operating properly in the event of the failure of (one or more faults within) some of its components

Redundancy

the duplication of critical components or functions of a system with the intention of increasing reliability of the system

Router

A device that forwards data packets along networks. It is connected to at least two networks, commonly two LANs or WANs or an LAN and its ISP network. They are located at gateways, the places where two or more networks connect.

Link Layer

group of methods and communications protocols confined to the link that a host is physically connected to

World Wide Web

a system of linked pages, programs, and files

HTTP

a protocol used by the World Wide Web