Networks And Internal Technologies Flashcards
(48 cards)
Describe the difference between a workstation and a server
A workstation is a powerful personal computer used by an individual to perform tasks, such as design, programming, or data analysis. A server, on the other hand, is a computer that provides services or resources (like files, websites, or printers) to other computers, called clients, over a network.
How do wireless networks connect devices in a network
Wireless networks connect devices by using radio waves to send data through the air. A transmitter sends the signal, and a receiver with an antenna picks it up and converts it back into data. This allows devices to communicate without cables.
Two advantages of using a fibre optic cable to connect a network
Fibre optic cables have a much greater bandwidth than metal cables.
An optical fibre offers low power loss, which allows for longer transmission distances. In comparison to copper
Define intranet
An intranet is a private, web-based network that is only available to an organisation’s staff
Main differences between an intranet and internet
The internet is a public global network that connects millions of computers, allowing users to access websites, services, and information from anywhere in the world. It is open to anyone with an internet connection.
An intranet is a private network used within an organization to share information, resources, and communication tools among employees. Access to an intranet is restricted to authorized users through login credentials, and it cannot be accessed by the general public.
Main purpose of an extranet
Extranets allow companies to share information securely
What would you use a VPN for
VPNs can be used to keep browsing data secure.
VPNs allow users not connected to the LAN to connect remotely
Define what a hacker is and distinguish between a hacker and a cracker
A hacker is someone with advanced knowledge of computer systems and networks who can gain access to systems, either legally or illegally. Not all hackers have bad intentions—some use their skills to improve security.
A cracker, on the other hand, is a type of malicious hacker (often called a black-hat hacker) who breaks into systems with the intent to cause harm, steal data, or commit crimes. Crackers use their skills for illegal purposes, unlike ethical hackers who help protect systems.
Three ways to secure information on a network
Install a firewall to block unauthorized access
Set strong passwords and update them regularly
Maintain anti-virus software
Create A Virtual Private Network (VPN
Why would it be valuable for hackers to steal research data and documents?
Hackers steal research data because it can be valuable. They might sell it, use it to make money, or give it to others to get an advantage, especially if the research is important or secret.
What are the consequences of being a victim of a ransomware attack
Your computer system will be ‘locked’, inaccessible.
You won’t have access to your data.
Files are encrypted
Data loss
Besides computers, name other hardware devices you might find connected to a network
Printers
Scanners
Smartphones
Smart TVs
Two reasons why a wireless network is better than a cabled network
Devices connect easier to WLAN
Can be installed/configured in remote areas
Two disadvantages of using a WLAN
May need a specialist to setup
May be expensive
Signal loss
What is LAN
Is a small network of computers covering a small area, such as an office building or school
Explain how IM works
Instant Messaging (IM) lets people send and receive text messages in real time over the internet or a local network. Users type short messages and send them instantly to each other, like a live conversation.
Two reasons why employees should be careful when using IM
Security risks – Instant messages can be intercepted or hacked if not properly secured, leading to sensitive information being leaked.
- Professionalism – Informal or inappropriate messages can be misunderstood or cause problems in the workplace.
Why is it a good idea to use FTP to share huge documents
Allows you to transfer multiple files as well as directories
Faster transfers then HTTP
The ability to add items to a “queue” to be uploaded/downloaded
Two disadvantages of using FTP
Usernames, passwords and files are sent in clear text
Servers can be spoofed to send data to a random port on an unintended computer
Advantages of LAN
Software(and licenses), files and hardware can be shared easily with the devices connected to the network
Networks can be centrally controlled, making it easier to make changes, monitor users, update software, troubleshoot hardware and software issues and maintain resources
Disadvantages of LAN
The initial setup costs for creating a network can be high, especially in a school or office environment, as you need to make sure that you have enough resources for the number of computers
If network is not secured properly, one infected computer can infect the entire network
What is WLAN
A wireless computer network that links two or more devices using wireless communication to form a local area network within a limited area such as a home, school etc
Basic components of a network
Workstation and servers
NIC
Network devices
Communication media
Network software
Main function of server
Is to serve the information stored on it to other computers that are connected to it by a network
