network security

 answer saperately according to the question 

 need 1.1 to 1.7 in 150 words 

Review Questions:

1.1 What is the OSI security architecture?

1.2 What is the difference between passive and active security threats?

1.3 List and briefly define categories of passive and active security threats?

1.4 List and briefly define categories of security services?

1.5 List and briefly define categories of security mechanisms.

1.6 List and briefly define the fundamental security design principles.

1.7 Explain the difference between an attack surface and an attack tree

need 400-500 words 

As an Introduction to this course, in your own words, define computer security as it is commonly used in the field today.

Define at least 2 subsets of computer security topics.Discuss the importance of understanding the difference between network security, systems security, and information security within the field of computer security.

need both saperately very fast