CEH-001 Exam Dumps : Certified Ethical Hacker (CEH)

Which of the following steganography utilities exploits the nature of white space and allows the user to conceal information in these white spaces?

John runs a Web server, IDS and firewall on his network. Recently his Web server has been under constant hacking attacks. He looks up the IDS log files and sees no intrusion attempts but the Web server constantly locks up and needs rebooting due to various brute force and buffer overflow attacks but still the IDS alerts no intrusion whatsoever. John becomes suspicious and views the Firewall logs and he notices huge SSL connections constantly hitting his Web server. Hackers have been using the encrypted HTTPS protocol to send exploits to the Web server and that was the reason the IDS did not detect the intrusions. How would John protect his network from these types of attacks?

While performing a ping sweep of a subnet you receive an ICMP reply of Code 3/Type 13 for all the pings sent out.

What is the most likely cause behind this response?