TM255 Course Study Notes

The physical components of a computer system, including devices like the CPU, memory, and storage.

The act of taking something without permission.

Damage to hardware that prevents it from working properly.

Unauthorized changes to a device that compromise its security or functionality.

Making a service or access unavailable to users.

Dividing a large message into smaller, manageable chunks.

Each smaller chunk of data created during segmentation.

The process of combining multiple segments back into the original message.

Sending each segment separately over a network.

Allows for efficient and reliable data transfer, especially over unreliable networks.

The type of communication channel used to send data in a network.

A wired network uses physical cables to connect devices, making unauthorized access harder.

A wireless network uses radio waves to transmit data, allowing access from anywhere within range.

Wireless networks are more susceptible to security breaches because they rely on open transmission channels.

Physical access to a network port is required to connect to a wired network, which limits unauthorized access.

Accessing a wireless network without authorization. This can lead to data theft, network performance issues, and security breaches.

Intercepting data transmitted over a wireless network. This allows attackers to gain access to sensitive information like passwords, emails, and financial details.

Actions that disrupt or prevent access to a wireless network. This can be caused by attacks like denial-of-service (DoS) attacks or accidental configuration errors.

Unidentified wireless networks. These are often created by attackers to lure unsuspecting users into connecting to malicious networks.

A type of wireless network attack that broadcasts a fake Wi-Fi network with a similar name to a legitimate one. Users connecting unknowingly to this network can have their data intercepted and stolen.

GPS receivers determine their location by calculating the distance to multiple satellites using the time it takes radio signals to travel.

The speed of radio signals from satellites is used to calculate the distance between the GPS receiver and each satellite.

GPS receivers measure the time it takes for radio signals from each satellite to reach them.

The time it takes radio signals to travel from satellites to a GPS receiver is influenced by the distance between them.

By knowing the speed of radio signals and the time it takes them to reach the receiver, GPS receivers can calculate the distance to each satellite.

WPA/WPA2-Personal is easier to set up than WPA2-Enterprise because it uses a pre-shared key (PSK) instead of a complex authentication server. This means the user sets up the network using a password, making it a simpler configuration for home users.

WPA/WPA2-Personal is commonly used in home networks and smaller businesses because of its ease of use. It's a more accessible option for users who don't need the advanced security features of WPA2-Enterprise.

The SSID (Service Set Identifier) is the name of your Wi-Fi network that appears on your devices' list of available networks. It's what you see when you search for Wi-Fi.

You can customize the name of your Wi-Fi network, which allows you to distinguish it from other networks. The name you choose will be displayed on devices searching for Wi-Fi networks.

WPA2-Enterprise is more secure than WPA/WPA2-Personal because it uses an authentication server to verify user credentials. This makes it a better choice for businesses and organizations that have stricter security requirements.