Ch.2 Communication and Internet Technologies Flashcards Preview

IGCSE Computer Science > Ch.2 Communication and Internet Technologies > Flashcards

Flashcards in Ch.2 Communication and Internet Technologies Deck (5)
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1

How do DOS attacks work?

- Large number of requests sent to server at once
- Useless traffic floods the server
- Server will come to a stop trying to deal with the traffic
- Prevents users gaining access to the web server

2

What do cookies do?

- Saves log-in information
- Provides customized page for user
- Enables target advertisements
- One-click purchasing

3

3 functions of browsers

− Allows user to view web pages
− Renders HTML
− Allows user to bookmark/favourite web pages
− Provides navigation features
− Allows (multiple) tabs
− Stores cookies
− Records history of pages visited
− Has a homepage
− Runs active script
− Allows files to be downloaded from website/internet
− Sends a request to the IP address/web server (to obtain the contents of a web page)
− Sends URL to DNS
− Manages HTTP/HTTPS protocol

4

Location of a device on a network

IP address

5

Number that uniquely identifies device

MAC address