# CIS105: Computer Applications & Information Systems Lect. 9 | Toshiki's Note
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# CIS105: Computer Applications & Information Systems Lect. 9 ​

Author:Anda Toshiki
Updated:a minute ago
Words:426
Reading:2 min

## Chapter 9: Internet ​

### 9.1: Internet History ​

- 1969: University of California Los Angeles (UCLA) created the Advanced Research Project Agency Network (ARPANET)
- 1989: Hypertext Transfer Protocol (HTTP) / World Wide Web (WWW)
- 1993: Hypertext Markup Langauge (HTML)

### 9.2: Internet and WWW Structure ​

- he internet is a network called the Client/Server Model
- The browser application software interprets HTML and HTTP to create web pages
- Everything on the internet lives somewhere physically; the trick is using computer addresses to send info from one place to another

### 9.3: Internet Addresses ​

- Internet Protocol Address (IP): An address system used to identify and communicate through the network
- Uniform Resource Locators (URLs)
  - `https://asu.edu`
  - `https`: refers to standard protocol
  - `www`: refers to the world wide web
  - `Canvas.asu`: domain name
  - `.edu`: a top-level domain code or extension

### 9.4/9.5: Websites/Browsers ​

- Website: A collection of web pages on a server that exists on the web that can be requested by a client and displayed with a browser
- Hyperlink: Clickable navigation element
- Browser: An application software that provides an interface for the WWW
- Aspects of a good website:
  - Content
  - Interactivity
  - Design

### 9.6: Browser Features ​

- Common Browser Features
  - Bookmarks: AKA favorites
  - Caching: Just like a CPU cache on the internet
  - Cookies: Text files used to track info about users
  - Graphics File (GIF, JPEG): Images and videos
  - Javascript: A programming language
    - Used to make websites dynamics; Ex: Countdown timer
- Browser Considerations:
  - Security
  - Popup Blockers
  - Usability

### 9.7: Internet Service Providers (ISP) ​

- Connectivity: When one computer connects to another and shares info & resources
- Internet Service Providers (ISP)
  - Dial-up & Digital Subscriber Line (DSL)
  - Broadband Internet Access
  - Web Hosting

### 9.8: Search Engines ​

- Search engine: A website that lets a user type in specific key words or phrases and then return a list of hyperlinks that best match the search criteria
  - Google, Bing, Yahoo
  - Directory searches
  - Metasearch Engines
    - Ex: Dogpile

### 9.9: E-Commerce ​

- Electronic Commerce (E-Commerce): The distribution, buying, selling, advertising, and marketing of goods and services over the web
  - Business-to-Business (B2B)
  - Business-to-Consumer (B2C)
  - Consumer-to-Consumer (C2C)
- The rules of business still apply to online environments

### 9.10: Security ​

- Malware: Software designed to damage a computer's system without the owner's knowledge
  - Virus
  - Worms
  - Trojan Horse
  - Spyware
  - Adware

### 9.11/9.12: Email/Email Security ​

- Email: "A store and forward" system of composing, sending, storing, and receiving message over electronic communication systems.
- Never send an email you wouldn't be willing to say in public
- Phishing: An email that looks official but is malicious in nature
- Spam: Unwanted mail