Active Attack

Question 1

involve some modification of stored or transmitted data or the creation of false data.

Answer 1

Active attacks

Question 2

There are four categories of active attacks

Answer 2

• Replay
• Masquerade
• Modification of messages
• Denial of service

Question 2

A … takes place when one entity pretends to be a different entity.

Answer 2

Masquerade

Question 3

Involves the passive capture of a data unit and its subsequent retransmission to produce an unauthorized effect

Answer 3

Replay

Question 4

simply means that some portion of a legitimate message is altered or that messages are delayed or reordered to produce an unauthorized effect

Answer 4

Data modification

Question 5

prevents or inhibits the normal use or management of communication facilities.

Such an attack may have a specific target; for example, an entity may supress all messages directed to a particular destination.

Another form of … is the disruption of an entire network

Answer 5

denial-of-service attack