The SYN flood attack sends TCP connections requests faster than a machine can process them.
-> Attacker creates a random source address for each packet
-> SYN flag set in each packet is a request to open a new connection to the server from the spoofed IP address
-> Victim responds to spoofed IP address, then waits for confirmation that never arrives (timeout wait is about 3 minutes)
-> Victim's connection table fills up waiting for replies and ignores new connections
-> Legitimate users are ignored and will not be able to access the server
How do you protect your network against SYN Flood attacks?
Answer : A,B,D,E
What type of port scan is shown below?
Answer : B
Stephanie works as a records clerk in a large office building in downtown Chicago. On
Monday, she went to a mandatory security awareness class (Security5) put on by her company's IT department. During the class, the IT department informed all employees that everyone's Internet activity was thenceforth going to be monitored.
Stephanie is worried that her Internet activity might give her supervisor reason to write her up, or worse get her fired. Stephanie's daily work duties only consume about four hours of her time, so she usually spends the rest of the day surfing the web. Stephanie really enjoys surfing the Internet but definitely does not want to get fired for it.
What should Stephanie use so that she does not get in trouble for surfing the Internet?
Answer : B
Neil is a network administrator working in Istanbul. Neil wants to setup a protocol analyzer on his network that will receive a copy of every packet that passes through the main office switch. What type of port will Neil need to setup in order to accomplish this?
Answer : B
In TCP communications there are 8 flags; FIN, SYN, RST, PSH, ACK, URG, ECE, CWR.
These flags have decimal numbers assigned to them:
FIN = 1 -
SYN = 2 -
RST = 4 -
PSH = 8 -
ACK = 16 -
URG = 32 -
ECE = 64 -
CWR = 128 -
Jason is the security administrator of ASPEN Communications. He analyzes some traffic using Wireshark and has enabled the following filters.
What is Jason trying to accomplish here?
Answer : B
Jayden is a network administrator for her company. Jayden wants to prevent MAC spoofing on all the Cisco switches in the network. How can she accomplish this?
Answer : D
Peter extracts the SID list from Windows 2008 Server machine using the hacking tool
"SIDExtracter". Here is the output of the SIDs:
From the above list identify the user account with System Administrator privileges?
Answer : F
What is the problem with this ASP script (login.asp)?
Answer : D
Google uses a unique cookie for each browser used by an individual user on a computer.
This cookie contains information that allows Google to identify records about that user on its database. This cookie is submitted every time a user launches a Google search, visits a site using AdSense etc. The information stored in Google's database, identified by the cookie, includes
-> Everything you search for using Google
-> Every web page you visit that has Google Adsense ads
How would you prevent Google from storing your search keywords?
Answer : A
How many bits encryption does SHA-1 use?
Answer : D
In Trojan terminology, what is required to create the executable file chess.exe as shown below?
Answer : C
Syslog is a standard for logging program messages. It allows separation of the software that generates messages from the system that stores them and the software that reports and analyzes them. It also provides devices, which would otherwise be unable to communicate a means to notify administrators of problems or performance.
What default port Syslog daemon listens on?
Answer : D
This attack uses social engineering techniques to trick users into accessing a fake Web site and divulging personal information. Attackers send a legitimate-looking e-mail asking users to update their information on the company's Web site, but the URLs in the e-mail actually point to a false Web site.
Answer : C
Which of the following statements would NOT be a proper definition for a Trojan Horse?
Answer : A
What is the correct command to run Netcat on a server using port 56 that spawns command shell when connected?
Answer : D
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