You went to great lengths to install all the necessary technologies to prevent hacking attacks, such
as expensive firewalls, antivirus software, anti-spam systems and intrusion detection/prevention
tools in your company’s network. You have configured the most secure policies and tightened
every device on your network. You are confident that hackers will never be able to gain access to
your network with complex security system in place. Your peer, Peter Smith who works at the
same department disagrees with you. He says even the best network security technologies cannot
prevent hackers gaining access to the network because of presence of “weakest link” in the
security chain. What is Peter Smith talking about?

A.
Untrained staff or ignorant computer users who inadvertently become the weakest link in your
security chain

B.
“zero-day” exploits are the weakest link in the security chain since the IDS will not be able to
detect these attacks

C.
“Polymorphic viruses” are the weakest link in the security chain since the Anti-Virus scanners
will not be able to detect these attacks

D.
Continuous Spam e-mails cannot be blocked by your security system since spammers use
different techniques to bypass the filters in your gateway