SY0-401 Guide

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  • Exam Number/Code SY0-401
  • Product Name CompTIA Security+ Certification
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Q221. Joe, a technician, is tasked with finding a way to test operating system patches for a wide variety of servers before deployment to the production environment while utilizing a limited amount of hardware resources. Which of the following would provide the BEST environment for performing this testing? 

A. OS hardening 

B. Application control 

C. Virtualization 

D. Sandboxing 

Answer:

Explanation: 


Q222. After a user performed a war driving attack, the network administrator noticed several similar markings where WiFi was available throughout the enterprise. Which of the following is the term used to describe these markings? 

A. IV attack 

B. War dialing 

C. Rogue access points 

D. War chalking 

Answer:

Explanation: 

War chalking is the act of making chalk marks on outdoor surfaces (walls, sidewalks, buildings, sign posts, trees) to indicate the existence of an open wireless network connection, usually offering an Internet connection so that others can benefit from the free wireless access. The open connections typically come from the access points of wireless networks located within buildings to serve enterprises. The chalk symbols indicate the type of access point that is available at that specific spot. 


Q223. Which of the following would allow the organization to divide a Class C IP address range into several ranges? 

A. DMZ 

B. Virtual LANs 

C. NAT 

D. Subnetting 

Answer:

Explanation: 

Subnetting is a dividing process used on networks to divide larger groups of hosts into smaller collections. 


Q224. Several employees submit the same phishing email to the administrator. The administrator finds that the links in the email are not being blocked by the company’s security device. Which of the following might the administrator do in the short term to prevent the emails from being received? 

A. Configure an ACL 

B. Implement a URL filter 

C. Add the domain to a block list 

D. Enable TLS on the mail server 

Answer:

Explanation: 

Blocking e-mail is the same as preventing the receipt of those e-mails and this is done by applying a filter. But the filter must be configured to block it. Thus you should add that specific domain from where the e-mails are being sent to the list of addresses that is to be blocked. 


Q225. A security analyst needs to ensure all external traffic is able to access the company’s front-end servers but protect all access to internal resources. Which of the following network design elements would MOST likely be recommended? 

A. DMZ 

B. Cloud computing 

C. VLAN 

D. Virtualization 

Answer:

Explanation: 

A demilitarized zone (DMZ) is an area of a network that is designed specifically for public users to access. The DMZ is a buffer network between the public untrusted Internet and the private trusted LAN. Often a DMZ is deployed through the use of a multihomed firewall. 


Q226. Pete, the system administrator, has concerns regarding users losing their company provided smartphones. Pete’s focus is on equipment recovery. Which of the following BEST addresses his concerns? 

A. Enforce device passwords. 

B. Use remote sanitation. 

C. Enable GPS tracking. 

D. Encrypt stored data. 

Answer:

Explanation: 

Global Positioning System (GPS) tracking can be used to identify its location of a stolen device and can allow authorities to recover the device. However, for GPS tracking to work, the device must have an Internet connection or a wireless phone service over which to send its location information. 


Q227. Which of the following provides additional encryption strength by repeating the encryption process with additional keys? 

A. AES 

B. 3DES 

C. TwoFish 

D. Blowfish 

Answer:

Explanation: 

Triple-DES (3DES) is a technological upgrade of DES. 3DES is still used, even though AES is the preferred choice for government applications. 3DES is considerably harder to break than many other systems, and it’s more secure than DES. It increases the key length to 168 bits (using three 56-bit DES keys). 


Q228. A technician is reviewing the logical access control method an organization uses. One of the senior managers requests that the technician prevent staff members from logging on during nonworking days. Which of the following should the technician implement to meet managements request? 

A. Enforce Kerberos 

B. Deploy smart cards 

C. Time of day restrictions 

D. Access control lists 

Answer:

Explanation: Time of day restrictions limit when users can access specific systems based on the time of day or week. It can limit access to sensitive environments to normal business hours. 


Q229. Which of the following would provide the STRONGEST encryption? 

A. Random one-time pad 

B. DES with a 56-bit key 

C. AES with a 256-bit key 

D. RSA with a 1024-bit key 

Answer:

Explanation: 

One-time pads are the only truly completely secure cryptographic implementations. 

They are so secure for two reasons. First, they use a key that is as long as a plaintext message. 

That means there is no pattern in the key application for an attacker to use. Also, one-time pad 

keys are used only once and then discarded. So even if you could break a one-time pad cipher, 

that same key would never be used again, so knowledge of the key would be useless. 


Q230. The datacenter manager is reviewing a problem with a humidity factor that is too low. Which of the following environmental problems may occur? 

A. EMI emanations 

B. Static electricity 

C. Condensation 

D. Dry-pipe fire suppression 

Answer:

Explanation: 

Humidity control prevents the buildup of static electricity in the environment. If the humidity drops much below 50 percent, electronic components are extremely vulnerable to damage from electrostatic shock. 


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