Question

Which of the following are correct definitions of defences:

a. Denial of service attacks affect the confidentiality of data on a network
b. Stateless firewalls maintain a list of running sessions and permit unchecked access once a sessic
c. Proxy firewalls carry out external network access on behalf of clients on the internal network
d. Dorothy Denning was a pioneer in developing Intrusion Detection Systems

Answer 1

Only statements c ('Proxy firewalls carry out external network access on behalf of clients on the internal network') and d ('Dorothy Denning was a pioneer in developing Intrusion Detection Systems') are correct definitions of network security defenses.

Step-by-step explanation:

Regarding network security defenses, let's clarify each of the statements provided:

• Statement a is incorrect because Denial of Service (DoS) attacks primarily affect the availability of services and not the confidentiality of data on a network.
• Statement b is incorrect. Stateless firewalls do not maintain a list of running sessions; instead, they filter traffic based solely on stateless packet inspection, without considering the state of the connection.
• Statement c is correct. Proxy firewalls act as an intermediary for requests from clients seeking resources from external networks. They effectively hide the true origin of the request, increasing security.
• Statement d is correct. Dorothy Denning is indeed recognized for her significant contributions to the field of computer security, including her work on Intrusion Detection Systems (IDS).

Only statements c and d provide correct definitions of defenses in the context of network security.