Unit 2 - AP Comp Sci

Internet Protocol

Internet Protocol

a set of rules governing the format of data sent over the Internet or other network.

The Internet

global system of interconnected computer networks that use the Internet protocol.

Electronic Devices

Can connect to the internet (desktop computer, laptops, smart phones, etc.)

Networks

A set of computers connected for the purpose of sharing data

Domain Name System (DNS)

The services that translate URLs to IP addresses (internet phone book)

Browser

Software that allows us to access the internet.

Web server

computer system that processes requests via HTTP, the basic network protocol used to distribute information on the World Wide Web.

IP address

a number that represents an address of a device connected to the internet.

IPv6

128 bits IP address system replacing IPv4

HTTP/HTTPS

Hypertext Transfer Protocol - language used by devices on the internet to communicate; ‘S’ stands for secure.

SMTP

Simple mail transfer protocol - protocol for handling internet mail

IETF

volunteers who develop internet protocols

Hierarchy

a system of organization

Redundancy (fault tolerance)

backup system built in; internet has redundancy bult in

Domain Name Syntax

a system that translates domain names to IP addressees

Routing/routers

computers that receive and forward data to IP addresses

Scalability

Ability of a network to grow/handle growth

Redundancy of routing

Ability to handle network / physical component issues and get data from one device to another.

protocol

a set of rules to establish transmission of data on the internet

interfaces

program that allows a human to interact with a device

packet

a digital envelope that contains data which includes sender and receiver information

TCP/IP

checks packets, order them and sends requests for missing packets.

SSL/TLS

creates a safe link between client and server

subdomain

digital certificate

issued when a secured and verified link to a website has been established

internet vs www

www is a part of the larger internet

download

receiving data to store on your device

streaming

a method of transmitting/receiving data as a steady continuous flow allowing playback while still receiving data (usually video or audio)

URL

use a name