- (Topic 18)
John is discussing security with Jane. Jane had mentioned to John earlier that she suspects an LKM has been installed on her server. She believes this is the reason that the server has been acting erratically lately. LKM stands for Loadable Kernel Module.
What does this mean in the context of Linux Security?

Correct Answer:D
Loadable Kernel Modules, or LKM, are object files that contain code to extend the running kernel, or so-called base kernel, without the need of a kernel recompilation. Operating systems other than Linux, such as BSD systems, also provide support for LKM's. However, the Linux kernel generally makes far greater and more versatile use of LKM's than other systems. LKM's are typically used to add support for new hardware, filesystems or for adding system calls. When the functionality provided by an LKM is no longer required, it can be unloaded, freeing memory.

- (Topic 1)
ABC.com is legally liable for the content of email that is sent from its systems, regardless of whether the message was sent for private or business-related purpose. This could lead to prosecution for the sender and for the company’s directors if, for example, outgoing email was found to contain material that was pornographic, racist or likely to incite someone to commit an act of terrorism.
You can always defend yourself by ‘ignorance of the law’ clause.

Correct Answer:B
Ignorantia juris non excusat or Ignorantia legis neminem excusat (Latin for "ignorance of the law does not excuse" or "ignorance of the law excuses no one") is a public policy holding that a person who is unaware of a law may not escape liability for violating that law merely because he or she was unaware of its content; that is, persons have presumed knowledge of the law. Presumed knowledge of the law is the principle in jurisprudence that one is bound by a law even if one does not know of it. It has also been defined as the "prohibition of ignorance of the law".

- (Topic 23)
How would you permanently wipe the data in the hard disk?

Correct Answer:A

- (Topic 18)
Ron has configured his network to provide strong perimeter security. As part of his network architecture, he has included a host that is fully exposed to attack. The system is on the public side of the demilitarized zone, unprotected by a firewall or filtering router. What would you call such a host?

Correct Answer:D
A bastion host is a gateway between an inside network and an outside network. Used as a security measure, the bastion host is designed to defend against attacks aimed at the inside network. Depending on a network's complexity and configuration, a single bastion host may stand guard by itself, or be part of a larger security system with different layers of protection.

- (Topic 16)
Which are true statements concerning the BugBear and Pretty Park worms? Select the best answers.

Correct Answer:ACD
Explanations: Both Pretty Park and BugBear use email to spread. Pretty Park cannot propagate via network shares, only email. BugBear propagates via network shares and email. It also terminates anti-virus applications and acts as a backdoor server for someone to get into the infected machine. Pretty Park tries to connect to an IRC server to send your personal passwords and all sorts of other information it retrieves from your PC.
Pretty Park cannot terminate anti-virus applications. However, BugBear can terminate AV software so that it can bypass them.

- (Topic 3)
Steve scans the network for SNMP enabled devices. Which port number Steve should scan?

Correct Answer:C
The SNMP default port is 161. Port 69 is used for tftp, 150 is for SQL-NET and 169 is for SEND.