Establishing goals and guidelines is part of which the following test phases of the security assessment?

What tag should you leave out if you want certain information hidden?

a. ``` ``` b. ``` ``` c. ``` ``` d. ``` ```

Outline the design of a scheme that uses message retransmissions with IP multicast to overcome the problem of dropped messages. Your scheme should take the following points into account:

i) there may be multiple senders; ii) generally only a small proportion of messages are dropped; iii) unlike the request-reply protocol, recipients may not necessarily send a message within any particular time limit. Assume that messages that are not dropped arrive in sender ordering.