312-50 Free Practice Test

- (Topic 6)
In the context of Trojans, what is the definition of a Wrapper?

1. A. An encryption tool to protect the Trojan.
2. B. A tool used to bind the Trojan with legitimate file.
3. C. A tool used to encapsulated packets within a new header and footer.
4. D. A tool used to calculate bandwidth and CPU cycles wasted by the Trojan.

Correct Answer: B
These wrappers allow an attacker to take any executable back-door program and combine it with any legitimate executable, creating a Trojan horse without writing a single line of new code.

- (Topic 4)
What is the proper response for a NULL scan if the port is closed?

1. A. SYN
2. B. ACK
3. C. FIN
4. D. PSH
5. E. RST
6. F. No response

Correct Answer: E
Closed ports respond to a NULL scan with a reset.

- (Topic 19)
When referring to the Domain Name Service, what is denoted by a ‘zone’?

1. A. It is the first domain that belongs to a company.
2. B. It is a collection of resource records.
3. C. It is the first resource record type in the SOA.
4. D. It is a collection of domains.

Correct Answer: B
A reasonable definition of a zone would be a portion of the DNS namespace where responsibility has been delegated.

- (Topic 23)
How do you defend against DHCP Starvation attack?

1. A. Enable ARP-Block on the switch
2. B. Enable DHCP snooping on the switch
3. C. Configure DHCP-BLOCK to 1 on the switch
4. D. Install DHCP filters on the switch to block this attack

Correct Answer: B

- (Topic 23)
In what stage of Virus life does a stealth virus gets activated with the user performing certain actions such as running an infected program?

1. A. Design
2. B. Elimination
3. C. Incorporation
4. D. Replication
5. E. Launch
6. F. Detection

Correct Answer: E