1) Name the seven layers of the OSI network model, and 2) enumerate security issues at each level. I have done the first one for you as an example: Layer 1 - Physical: theft, bit errors, denial of service, noise, signal errors, RF interference, removable media, open wall ports, flooding, natural disasters, EMP bomb. Solution The seven layers of the OSI model are as follows: Layer 1-Physical layer: The security issues at this layer are theft, bit errors, denial of service, noise, signal errors, RF interference, removable media, open wall ports, flooding, natural disasters, EMP bomb. Layer 2-Data link layer: The security issues that can occur at this layer are MAC flooding, disruption in the flow of the data. Layer 3-Network layer: The security issues are: ICMP Flooding, load on firewall, loss of confidentiality. Layer 4-Transport Layer: SYN flood, Smurf Attack, Layer 5-Session layer: The security issues that can occur at this layer can occur during the inter- machine communication. Layer 6-Presentation Layer: The poor handling of input (malicious) can lead to crashes. Layer 7-Application Layer: This layer is most prevalent to attack by hackers. At this layer, the entire application can be manipulated, user data can be stolen. It can lead to destruction of the entire network. This is also known as Denial of Service attack..

1. 1) Name the seven layers of the OSI network model, and 2) enumerate security issues at each
level. I have done the first one for you as an example:
Layer 1 - Physical: theft, bit errors, denial of service, noise, signal errors, RF interference,
removable media, open wall ports, flooding, natural disasters, EMP bomb.
Solution
The seven layers of the OSI model are as follows:
Layer 1-Physical layer: The security issues at this layer are theft, bit errors, denial of service,
noise, signal errors, RF interference, removable media, open wall ports, flooding, natural
disasters, EMP bomb.
Layer 2-Data link layer: The security issues that can occur at this layer are MAC flooding,
disruption in the flow of the data.
Layer 3-Network layer: The security issues are: ICMP Flooding, load on firewall, loss of
confidentiality.
Layer 4-Transport Layer: SYN flood, Smurf Attack,
Layer 5-Session layer: The security issues that can occur at this layer can occur during the inter-
machine communication.
Layer 6-Presentation Layer: The poor handling of input (malicious) can lead to crashes.
Layer 7-Application Layer: This layer is most prevalent to attack by hackers. At this layer, the
entire application can be manipulated, user data can be stolen. It can lead to destruction of the
entire network. This is also known as Denial of Service attack.