1. Compare between Block Cipher and Stream Cipher. 2. How can an attacker attack DES using brute Force attack? 3. How can an attacker try to attack AES using cryptanalysis attack? 4. Why public encryption RSA is not preferred in encrypting large amount of exchanged da 5. Explain how you can get a digital certificate from a certificate authority CA? 6. Discuss the three types of Access Control Methods: DAC, MAC and RBAC. 7. Compare between DoS and DDoS