CS Principles 2019-2020

Unit 1

Vocab

Unit 1 - The Internet

Lesson 1: Personal Innovations

  • Innovation: A new or improved idea, device, product, etc, or the development thereof

Lesson 2: Sending Binary Messages

  • Binary: A way of representing information using only two options.
  • Bit: A contraction of "Binary Digit"; the single unit of information in a computer, typically represented as a 0 or 1

Lesson 3: Sending Binary Messages with the Internet Simulator

  • Bandwidth: Transmission capacity measure by bit rate
  • Bit: A contraction of "Binary Digit"; the single unit of information in a computer, typically represented as a 0 or 1
  • Bit rate: (sometimes written bitrate) the number of bits that are conveyed or processed per unit of time. e.g. 8 bits/sec.
  • Latency: Time it takes for a bit to travel from its sender to its receiver.
  • Protocol: A set of rules governing the exchange or transmission of data between devices.

Lesson 6: Sending Numbers

  • Protocol: A set of rules governing the exchange or transmission of data between devices.

Lesson 7: Sending Text

  • Abstraction: a simplified representation of something more complex. Abstractions allow you to hide details to help you manage complexity, focus on relevant concepts, and reason about problems at a higher level.
  • ASCII: American Standard Code for Information Interchange; the universally recognized raw text format that any computer can understand
  • Protocol: A set of rules governing the exchange or transmission of data between devices.

Lesson 8: The Internet Is for Everyone

  • IETF: Internet Engineering Task Force - develops and promotes voluntary Internet standards and protocols, in particular the standards that comprise the Internet protocol suite (TCP/IP).
  • Internet: A group of computers and servers that are connected to each other.
  • Net Neutrality: the principle that all Internet traffic should be treated equally by Internet Service Providers.

Lesson 9: The Need for Addressing

  • IP Address: A number assigned to any item that is connected to the Internet.
  • Packets: Small chunks of information that have been carefully formed from larger chunks of information.
  • Protocol: A set of rules governing the exchange or transmission of data between devices.

Lesson 10: Routers and Redundancy

  • Network Redundancy: having multiple backups to ensure reliability during cases of high usage or failure
  • Router: A type of computer that forwards data across a network

Lesson 11: Packets and Making a Reliable Internet

  • Packets: Small chunks of information that have been carefully formed from larger chunks of information.
  • TCP: Transmission Control Protocol - provides reliable, ordered, and error-checked delivery of a stream of packets on the internet. TCP is tightly linked with IP and usually seen as TCP/IP in writing.

Lesson 12: The Need for DNS

  • DNS: short for Domain Name System, this system translates domain names (like example.com) to IP addresses (like 93.184.216.34)

Lesson 13: HTTP and Abstraction on the Internet

  • DNS: short for Domain Name System, this system translates domain names (like example.com) to IP addresses (like 93.184.216.34)
  • HTTP: HyperText Transfer Protocol - the protocol used for transmitting web pages over the Internet
  • IP Address: A number assigned to any item that is connected to the Internet.
  • TCP: Transmission Control Protocol - provides reliable, ordered, and error-checked delivery of a stream of packets on the internet. TCP is tightly linked with IP and usually seen as TCP/IP in writing.
  • URL: An easy-to-remember address for calling a web page (like www.code.org).

Lesson 14: Practice PT - The Internet and Society

  • DNS: short for Domain Name System, this system translates domain names (like example.com) to IP addresses (like 93.184.216.34)
  • HTTP: HyperText Transfer Protocol - the protocol used for transmitting web pages over the Internet
  • IP Address: A number assigned to any item that is connected to the Internet.
  • Net Neutrality: the principle that all Internet traffic should be treated equally by Internet Service Providers.
  • TCP: Transmission Control Protocol - provides reliable, ordered, and error-checked delivery of a stream of packets on the internet. TCP is tightly linked with IP and usually seen as TCP/IP in writing.