Q1. What Makes A Network Vulnerable are many way explain these two :

1. Size (Many Points Of Attack)

2. Sharing

Q2. Cryptography cannot give solution to security problems. What other cases cryptography cannot help?

Q 3. Explain which attack the following is and which security service category can prevent it.

A. Fathima logged into Banner as Sarah.

B. John sent message "transfer $1000 into Bob's account". Fathima changed the message to transfer $10000 into Bob's account" .

C. John sent email to Bob. Fathima captured a copy of the email and resent email to Bob.

D. Fathima has access to email server, but could not see the email content. She could observe only the number of emails, source of emails and size of emails.