a user's private key with the public key Drop all packets to the specified address a private key with a digital signature Task 21. Task 17. Bob is a security officer at a company. Users let him know that internal network Choose the correct answer and state the reason. connections are good, but it is very slow to connect to the outside world. On the external a) In publeiprivate key oryptography, even the sender will no longer be able to read the firewall, Bob scans logs and finds thousands of ICMP packets from a wide variety of different IP addresses. What sort of attack is taking place? message anter encryptiong it with the recelver's public key. Smurt DoS DDoS SYN flood D False Reabon: Task 18. Bob as the network specialist of a company installs a web server which requires to be accessible from the Internet. For security purposes, Bob installs the web server in an isolated part of the company's network. Which of the following architecture concepts is Bob implementing? b] Name the man cbjedtress of crppography. exploited