Security Aspects and Internet Technologies Flashcards
Hacker
A person who tries to get an unauthorised access to the network or a computer
Malware
A software program that is designed to damage or disrupt a computer
Virus
A software program that is designed to corrupt a computer and files on it and downloaded without user’s knowledge
Spyware
A software program that collect’s user’s information through their internet connection. The collection is done without user’s knowledge.
Firewall
A system that protects unauthorised access to or from a computer or a network. Firewalls have set of rules and if the traffic doesn’t obey it, it will blocked
What is a browser?
A program which allows the computer user to visit, retrieve and display information
What is HTTP(s)?
Hyper Text Transfer Protocol. Core protocol that governs transmission via the Internet. HTTPS: a secure version
What is TCP and how does it work?
Transmission Control Protocol - governs the transfer of info. Handles the transfer of the data to make sure it is error free.
What will the TCP do if it finds an error?
It will send an Automatic Repeat Request
What does HTML stand for? What are the two main parts of it?
Hyper Text Markup Language.
1) Display content
2) Give instructions to the browser
What is IP?
Internet Protocol
What format is IP written in?
Dotted decimal
What do dots separate in an IP?
Individual numbers
How IP address is split?
Last number - Host (individual machine on the network)
Rest - network
Why can there be two identical IP addresses on two private networks
As they are private, they don’t communicate with the internet. Therefore the IP address can be identical.
Define Gateway
A computer system that links two dissimilar computer networks
Define MAC address
MAC address in the unique address of the individual interface card. It is given to it when manufactured
What does the MAC address do?
When you request a web page, each router along the way uses the MAC address of the next router to send data packet on the next leg of its journey.
Does MAC address have any routing information?
No
What is a Network Interface Card
Provides a wired or wireless connection of the computer and the computer network
Describe which part states what
WWW.abc.co.uk/images/logo.png
www - hosted on World Wide Web
abc - name of organization (domain name)
co.uk - hosted in the UK
images/logo.jpg - Folder and file name
What system of numbers is used for a MAC address number?
Hexadecimals
