Network
A computer network is a collection of computers and other hardware components interconnected by communication channels that allow sharing of resources and information
Communication
Between all of the divices on the internet running on different platforms is made possible by the common communication protocal TCP and IP
Transmission Control Protocol (TCP)
Creates connections and exchanges information
Internet protocol (IP)
Responsible for addressing. Four numbers call octets separated by periods. Contains a number between 0-255
Domain Names
Name given to an IP address
World wide web
Collection of files that can be linked and accessed using HTTP
Hypertext
A groups of interlinked files
HTTP
Allows web browers to communicate with Web servers
HTML
A set of specifications telling a browser how to display a Web page
URL
A web address of a document on a computer
Primary Keys
Must be unique, cant be blank, are reused in other tables, can consist of one or more fields
Defining a database
Step one:what are the entites step two:what info do we want to know about them step three:what data attributes step 4:define how tables are related
Roles of tables
Store data on specific types of things, relate different tables, restrict data
Database queries
- What entities 2. What information 3. Selection criteria 4. Sort
Internet
The worldwide communications infrastructure that links computer networks using the internet suite of protocols and permits public access