Question

1. The OSI reference model is an idealized model that neatly breaks down communications and networks technology into functional layers with sharp well defined interfaces between each layer.

True

False

2. An insider attack can occur from within the boundaries of a VPN, Router or Firewall.

True

False

3. Implementing both a router and firewall for a PC is wasteful and provides no benefit for security.

True

False

4. Symmetric encryption uses how many unique keys to encrypt and decrypt a message? ___________

5. An operating system or application update plan should include a rollback plan?

True

False

Answer 1

1) Answer : True

Explaination : The OSI reference model is an idealized model for networking operations. It clearly divides functionality into 7 layers. These layers are :- Application layer, Presentation layer, Session layer, Transport layer, Network layer, Datalink layer and Physical layer.

2) Answer: True

Explanation : An insider can attack the system within the boundary of vpn/router/firewall.

3) Answer : False

Explanation : Implementing firewall provides security to pc.

4) Answer : 1

Explanation : Symmetric ecnryption uses only 1 key to encrypt and decrypt the message. While Public key infrastructure uses 2 keys.

5) Answer : True

Explanation : An OS or application update plan must use rollback plan to get rid of any failure during updation.