Section 2: LANS and Smaller Networks (10.2.1)

What is an ADSL router?

An ADSL router is a network device that provides connection between a local network and the Internet using an ASDSL broadband connection.

What does ADSL stand for?

Asymmetric Digital Subscriber Line

What is ADSL?

ADSL is a technology that provides high-speed Internet access over traditional copper telephone lines, with a higher download speed than upload speed.

Whys is it called Assymetric?

Because its download and upload speeds are different, with download speeds being higher.

What are the 4 main functions of a ADSL router

1. Provides Wireless/hotspot access

2. Provides Firewall protection

3. Acts a switch for wired devices

4. Connects local networks to the ISP/Internet

What does the switch function of an ADSL router do?

An ADSL can contain a built-in switch which allows devices to connect to the local network through Ethernet ports.

What does the firewall function of an ADSL router do?

An ADSL router can include a firewall that monitors and filters network traffic.

It prevents unauthorised or potentially harmful traffic from entering the local network.

What is the purpose of an ADSL router’s Internet connection?

An ADSL router connects the local network to the Internet through the ADSL connection. (visualise chain)

What is a user profile?

A user profile is a set of information and settings associated with a particular user account on a computer or network,

that helps determine how the user accesses a network/system.

What are user rights?

User rights refer to what a user is allowed to DO on a network/system

What are permissions?

Permissions are rules that determine which resources a user can access and what they are allowed to do with those resources.

Why are user profiles, rights and permissions used on a network?

1. To prevent unauthorised access

2. To protect sensitive information

3. To prevent users from accidentally modifying/deleting important files

4. Gives users ONLY the access they need

What are the 5 reasons for using networks

1. Communication - Networks allow users to communicate and exchange information (Eg. Email, instant messaging, video calls etc.)

2. Access to/sharing resources - Networks allow users to share hardware, software, files and Internet connection

3. Centralisation - Networks allow data, resources or services to be centrally stored and managed, often on a server

4. Data transfer - Networks allow data to be transferred between connected devices

5. Productivity - Networks make communication, collaboration and access to resources more efficient.

Disadvantages of using networks

1. Security Risks - A network can provide attackers with opportunities to gain unauthorised access to data or systems.

2. Spread of Malware - Malware can spread from one connected device to other devices on the network

3. Network failure affects many users - When an important network device/ server OR the network itself fails, many users lose access to the resources

4. Initial and maintenance costs - setting up a network can be expensive because of hardware, cables, network devices and installation. Networks require ongoing maintenance, upgrades, troubleshooting and administration

5. Privacy risks - Data transmitted or stored on a network can be intercepted or accessed by unauthorised users if security is inadequate.