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NEW QUESTION: 1
Where is the employee hierarchy used in Goal Management defined?
Please choose the correct answer.
Response:
A. The administrator defines the employee hierarchy directly in the Organizational Chart.
B. It is defined in the User Data File and reflected in the Organizational Chart.
C. The employees define the hierarchy by selecting their manager in a background element of their Employee Profile.
D. None of the above.
Answer: B
NEW QUESTION: 2
You are the administrator for a group of shell script developers. They use vi, and have asked you to make their scripts automatically executable when they save their files.
How can this be accomplished?
A. It is not possible to automatically set the execute bit on with the umask setting, or vi option.
B. Enter umask 766 the command line, or include it in the global startup script for the default shell.
C. Enter set -o vi on the command line, or include it in each user's startup script.
D. Enter umask 000 on the command line, or include it in each user's startup script.
E. Enter umask 777 on the command line, or include it in each user's startup script.
F. Enter umask -s on the command line, or include it in each user's startup script.
Answer: A
Explanation:
Unlike DOS, which uses the file extension to determine if a file is executable or not,
UNIX relies on file permissions.
The value assigned by umask is subtracted from the default.
User's file creation mask. umask sets an environment variable which automatically sets file
permissions on newly created files. i.e. it will set the shell process's file creation mask to mode.
umask 000 would grant full permissions.
Note: 777 full permissions
Topic 2, Volume B
NEW QUESTION: 3
What sort of attack is described by the following: An attacker has a list of broadcast addresses which it stores into an array, the attacker sends a spoofed icmp echo request to each of those addresses in series and starts again. The spoofed IP address used by the attacker as the source of the packets is the target/victim IP address.
A. LAND Attack
B. Fraggle Attack
C. Replay Attack
D. Smurf Attack
Answer: D
Explanation:
The Smurf Attack is a denial-of-service attack in which large numbers of Internet
Control Message Protocol (ICMP) packets with the intended victim's spoofed source IP are
broadcast to a computer network using an IP Broadcast address.
Most devices on a network will, in their default settings, respond to this by sending a reply to the
source IP address. If the number of machines on the network that receive and respond to these
packets is very large, the victim's computer will be flooded with traffic. This can slow down the
victim's computer to the point where it becomes impossible to work on.
The name Smurf comes from the file "smurf.c", the source code of the attack program, which was
released in 1997 by TFreak.
The author describes the attack as:
The `smurf' attack is quite simple. It has a list of broadcast addresses which it stores into an array,
and sends a spoofed icmp echo request to each of those addresses in series and starts again. The result is a devistating attack upon the spoofed ip with, depending on the amount of broadcast addresses used, many, many computers responding to the echo request.
Mitigation:
-Best method for mitigating this threat is to control access to the physical network infrastructure. If
the attacker can't send the attack, this attack will obviously not work.
- Currently the preferred method for controlling access to the network is by using 802.1X -
Certificate security.
-Also, modern operating systems don't usually permit a PING to a broadcast address and just
returns an error message if you try.
The following answers are incorrect:
-Fraggle Attack: Close but not quite right. A Fraggle attack uses UDP rather than the ICMP that Smurf Attack uses.
-LAND Attack: Sorry, not correct. A LAND attack is simply a series of packets sent to the target where the source and destination IP Addresses are the same as the victim.
-Replay Attack: This isn't an attack that takes advantage of a system vulnerability so it isn't the correct answer.
The following reference(s) was used to create this question: http://en.wikipedia.org/wiki/Smurf_attack and http://searchsecurity.techtarget.com/answer/What-is-a-land-attack and http://www.phreak.org/archives/exploits/denial/smurf.c