QUESTION: 185

Which type of sniffing technique is generally referred as MiTM attack?

Password Sniffing
ARP Poisoning
Mac Flooding
DHCP Sniffing

Answer(s): B

Switches maintain a CAM Table that maps individual MAC addresses on the network to physical ports on the switch.

In MAC flooding attack, a switch is fed with many Ethernet frames, each containing different source MAC addresses, by the attacker. Switches have a limited memory for mapping various MAC addresses to physical ports. What happens when the CAM table becomes full?

Switch then acts as hub by broadcasting packets to all machines on the network
The CAM overflow table will cause the switch to crash causing Denial of Service
The switch replaces outgoing frame switch factory default MAC address of FF:FF:FF:FF:FF:FF
Every packet is dropped and the switch sends out SNMP alerts to the IDS port

Answer(s): A

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QUESTION: 187

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?

Untrained staff or ignorant computer users who inadvertently become the weakest link in your security chain
"zero-day" exploits are the weakest link in the security chain since the IDS will not be able to detect these attacks
"Polymorphic viruses" are the weakest link in the security chain since the Anti-Virus scanners will not be able to detect these attacks
Continuous Spam e-mails cannot be blocked by your security system since spammers use different techniques to bypass the filters in your gateway

Answer(s): A

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QUESTION: 188

How does a denial-of-service attack work?

A hacker prevents a legitimate user (or group of users) from accessing a service
A hacker uses every character, word, or letter he or she can think of to defeat authentication
A hacker tries to decipher a password by using a system, which subsequently crashes the network
A hacker attempts to imitate a legitimate user by confusing a computer or even another person

Answer(s): A

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