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April 21, 2017

The Secret of 312-50 simulations

Q1. SNMP is a connectionless protocol that uses UDP instead of TCP packets? (True or False) 

A. True 

B. False 

Answer: A

Explanation: TCP and UDP provide transport services. But UDP was preferred. This is due to TCP characteristics, it is a complicate protocol and it consume to many memory and CPU resources. Where as UDP is easy to build and run. Into devices (repeaters and modems) vendors have built simple version of IP and UDP. 


Q2. The United Kingdom (UK) he passed a law that makes hacking into an unauthorized network a felony. 

The law states: 

Section1 of the Act refers to unauthorized access to computer material. This states that a person commits an offence if he causes a computer to perform any function with intent to secure unauthorized access to any program or data held in any computer. For a successful conviction under this part of the Act, the prosecution must prove that the access secured is unauthorized and that the suspect knew that this was the case. This section is designed to deal with common-or-graden hacking. 

Section 2 of the deals with unauthorized access with intent to commit or facilitate the commission of further offences. An offence is committed under Section 2 if a Section 1 offence has been committed and there is the intention of committing or facilitating a further offense (any offence which attacks a custodial sentence of more than five years, not necessarily one covered but the Act). Even if it is not possible to prove the intent to commit the further offence, the Section 1 offence is still committed. 

Section 3 Offences cover unauthorized modification of computer material, which generally means the creation and distribution of viruses. For conviction to succeed there must have been the intent to cause the modifications and knowledge that the modification had not been authorized 

What is the law called? 

A. Computer Misuse Act 1990 

B. Computer incident Act 2000 

C. Cyber Crime Law Act 2003 

D. Cyber Space Crime Act 1995 

Answer:

Explanation: Computer Misuse Act (1990) creates three criminal offences: 


Q3. In the context of password security, a simple dictionary attack involves loading a dictionary file (a text file full of dictionary words) into a cracking application such as L0phtCrack or John the Ripper, and running it against user accounts located by the application. The larger the word and word fragment selection, the more effective the dictionary attack is. The brute force method is the most inclusive, although slow. It usually tries every possible letter and number combination in its automated exploration. 

If you would use both brute force and dictionary methods combined together to have variation of words, what would you call such an attack? 

A. Full Blown 

B. Thorough 

C. Hybrid 

D. BruteDics 

Answer: C

Explanation: A combination of Brute force and Dictionary attack is called a Hybrid attack or Hybrid dictionary attack. 


Q4. Vulnerability scanners are automated tools that are used to identify vulnerabilities and misconfigurations of hosts. They also provide information regarding mitigating discovered vulnerabilities. 

Which of the following statements is incorrect? 

A. Vulnerability scanners attempt to identify vulnerabilities in the hosts scanned. 

B. Vulnerability scanners can help identify out-of-date software versions, missing patches, or system upgrades 

C. They can validate compliance with or deviations from the organization's security policy 

D. Vulnerability scanners can identify weakness and automatically fix and patch the vulnerabilities without user intervention 

Answer: D


Q5. Which type of Nmap scan is the most reliable, but also the most visible, and likely to be picked up by and IDS? 

A. SYN scan 

B. ACK scan 

C. RST scan 

D. Connect scan 

E. FIN scan 

Answer:

Explanation: The TCP full connect (-sT) scan is the most reliable. 


Q6. What is the goal of a Denial of Service Attack? 

A. Capture files from a remote computer. 

B. Render a network or computer incapable of providing normal service. 

C. Exploit a weakness in the TCP stack. 

D. Execute service at PS 1009. 

Answer: B

Explanation: In computer security, a denial-of-service attack (DoS attack) is an attempt to make a computer resource unavailable to its intended users. Typically the targets are high-profile web servers, and the attack attempts to make the hosted web pages unavailable on the Internet. It is a computer crime that violates the Internet proper use policy as indicated by the Internet Architecture Board (IAB). 


Q7. Rebecca is a security analyst and knows of a local root exploit that has the ability to enable local users to use available exploits to gain root privileges. This vulnerability exploits a condition in the Linux kernel within the execve() system call. There is no known workaround that exists for this vulnerability. What is the correct action to be taken by Rebecca in this situation as a recommendation to management? 

A. Rebecca should make a recommendation to disable the () system call 

B. Rebecca should make a recommendation to upgrade the Linux kernel promptly 

C. Rebecca should make a recommendation to set all child-process to sleep within the execve() 

D. Rebecca should make a recommendation to hire more system administrators to monitor all child processes to ensure that each child process can't elevate privilege 

Answer: B


Q8. Which of the following is true of the wireless Service Set ID (SSID)? (Select all that apply.) 

A. Identifies the wireless network 

B. Acts as a password for network access 

C. Should be left at the factory default setting 

D. Not broadcasting the SSID defeats NetStumbler and other wireless discovery tools 

Answer: AB


Q9. Jim’s Organization just completed a major Linux roll out and now all of the organization’s systems are running Linux 2.5 Kernel. The roll out expenses has posed constraints on purchasing other essential security equipment and software. The organization requires an option to control network traffic and also perform stateful inspection of traffic going into and out of the DMZ, which built-in functionality of Linux can achieve this? 

A. IP ICMP 

B. IP Sniffer 

C. IP tables 

D. IP Chains 

Answer: C

Explanation: iptables is the name of the user space tool by which administrators create rules for the packet filtering and NAT modules. While technically iptables is merely the tool which controls the packet filtering and NAT components within the kernel, the name iptables is often used to refer to the entire infrastructure, including netfilter, connection tracking and NAT, as well as the tool itself. iptables is a standard part of all modern Linux distributions. 


Q10. Which of the following is the primary objective of a rootkit? 

A. It opens a port to provide an unauthorized service 

B. It creates a buffer overflow 

C. It replaces legitimate programs 

D. It provides an undocumented opening in a program 

Answer: C

Explanation: Actually the objective of the rootkit is more to hide the fact that a system has been compromised and the normal way to do this is by exchanging, for example, ls to a version that doesn’t show the files and process implanted by the attacker. 



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