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October 11, 2017

Oct 2017 updated: comptia security+ sy0 401 pdf

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Q261. Matt, the IT Manager, wants to create a new network available to virtual servers on the same hypervisor, and does not want this network to be routable to the firewall. How could this BEST be accomplished? 

A. Create a VLAN without a default gateway. 

B. Remove the network from the routing table. 

C. Create a virtual switch. 

D. Commission a stand-alone switch. 

Answer:

Explanation: 

A Hyper-V Virtual Switch implements policy enforcement for security, isolation, and service levels. 


Q262. Which of the following should a company implement to BEST mitigate from zero-day malicious code executing on employees' computers? 

A. Least privilege accounts 

B. Host-based firewalls 

C. Intrusion Detection Systems 

D. Application white listing 

Answer:

Explanation: 


Q263. Which of the following helps to establish an accurate timeline for a network intrusion? 

A. Hashing images of compromised systems 

B. Reviewing the date of the antivirus definition files 

C. Analyzing network traffic and device logs 

D. Enforcing DLP controls at the perimeter 

Answer:

Explanation: 


Q264. A recent spike in virus detections has been attributed to end-users visiting www.compnay.com. The business has an established relationship with an organization using the URL of www.company.com but not with the site that has been causing the infections. Which of the following would BEST describe this type of attack? 

A. Typo squatting 

B. Session hijacking 

C. Cross-site scripting 

D. Spear phishing 

Answer:

Explanation: 

Typosquatting, also called URL hijacking or fake url, is a form of cybersquatting, and possibly brandjacking which relies on mistakes such as typographical errors made by Internet users when inputting a website address into a web browser. Should a user accidentally enter an incorrect website address, they may be led to any URL (including an alternative website owned by a cybersquatter). 

The typosquatter's URL will usually be one of four kinds, all similar to the victim site address: (In the following, the intended website is "example.com") 

.

A common misspelling, or foreign language spelling, of the intended site: exemple.com 

.

A misspelling based on typing errors: xample.com or examlpe.com 

.

A differently phrased domain name: examples.com 

.

A different top-level domain: example.org Once in the typosquatter's site, the user may also be tricked into thinking that they are in fact in the real site; through the use of copied or similar logos, website layouts or content. 


Q265. Joe, a network administrator, is able to manage the backup software console by using his network login credentials. Which of the following authentication services is he MOST likely using? 

A. SAML 

B. LDAP 

C. iSCSI 

D. Two-factor authentication 

Answer:

Explanation: 


Q266. A security administrator wants to get a real time look at what attackers are doing in the wild, hoping to lower the risk of zero-day attacks. Which of the following should be used to accomplish this goal? 

A. Penetration testing 

B. Honeynets 

C. Vulnerability scanning 

D. Baseline reporting 

Answer:

Explanation: 

A honeynet is a network set up with intentional vulnerabilities; its purpose is to invite attack, so that an attacker's activities and methods can be studied and that information used to increase network security. A honeynet contains one or more honey pots, which are computer systems on the Internet expressly set up to attract and "trap" people who attempt to penetrate other people's computer systems. Although the primary purpose of a honeynet is to gather information about attackers' methods and motives, the decoy network can benefit its operator in other ways, for example by diverting attackers from a real network and its resources. The Honeynet Project, a non-profit research organization dedicated to computer security and information sharing, actively promotes the deployment of honeynets. 

In addition to the honey pots, a honeynet usually has real applications and services so that it seems like a normal network and a worthwhile target. However, because the honeynet doesn't actually serve any authorized users, any attempt to contact the network from without is likely an illicit attempt to breach its security, and any outbound activity is likely evidence that a system has been compromised. For this reason, the suspect information is much more apparent than it would be in an actual network, where it would have to be found amidst all the legitimate network data. Applications within a honeynet are often given names such as "Finances" or "Human Services" to make them sound appealing to the attacker. 

A virtual honeynet is one that, while appearing to be an entire network, resides on a single server. 


Q267. The security administrator is currently unaware of an incident that occurred a week ago. Which of the following will ensure the administrator is notified in a timely manner in the future? 

A. User permissions reviews 

B. Incident response team 

C. Change management 

D. Routine auditing 

Answer:

Explanation: 

Routine audits are carried out after you have implemented security controls based on risk. These audits include aspects such as user rights and permissions and specific events. 


Q268. A small business needs to incorporate fault tolerance into their infrastructure to increase data availability. Which of the following options would be the BEST solution at a minimal cost? 

A. Clustering 

B. Mirrored server 

C. RAID 

D. Tape backup 

Answer:

Explanation: 

RAID, or redundant array of independent disks (RAID). RAID allows your existing servers to have more than one hard drive so that if the main hard drive fails, the system keeps functioning. RAID can achieve fault tolerance using software which can be done using the existing hardware and software. 


Q269. Joe, an administrator, installs a web server on the Internet that performs credit card transactions for customer payments. Joe also sets up a second web server that looks like the first web server. 

However, the second server contains fabricated files and folders made to look like payments were processed on this server but really were not. Which of the following is the second server? 

A. DMZ 

B. Honeynet 

C. VLAN 

D. Honeypot 

Answer:

Explanation: 

In this scenario, the second web server is a ‘fake’ webserver designed to attract attacks. We can then monitor the second server to view the attacks and then ensure that the ‘real’ web server is secure against such attacks. The second web server is a honeypot. 

A honeypot is a system whose purpose it is to be attacked. An administrator can watch and study the attack to research current attack methodologies. 

According to the Wepopedia.com, a Honeypot luring a hacker into a system has several main purposes: 

The administrator can watch the hacker exploit the vulnerabilities of the system, thereby learning 

where the system has weaknesses that need to be redesigned. 

The hacker can be caught and stopped while trying to obtain root access to the system. 

By studying the activities of hackers, designers can better create more secure systems that are 

potentially invulnerable to future hackers. 

There are two main types of honeypots: 

Production - A production honeypot is one used within an organization's environment to help 

mitigate risk. 

Research – A research honeypot add value to research in computer security by providing a 

platform to study the threat. 


Q270. An administrator has a network subnet dedicated to a group of users. Due to concerns regarding data and network security, the administrator desires to provide network access for this group only. Which of the following would BEST address this desire? 

A. Install a proxy server between the users’ computers and the switch to filter inbound network traffic. 

B. Block commonly used ports and forward them to higher and unused port numbers. 

C. Configure the switch to allow only traffic from computers based upon their physical address. 

D. Install host-based intrusion detection software to monitor incoming DHCP Discover requests. 

Answer:

Explanation: 

Configuring the switch to allow only traffic from computers based upon their physical address is known as MAC filtering. The physical address is known as the MAC address. Every network adapter has a unique MAC address hardcoded into the adapter. You can configure the ports of a switch to allow connections from computers with specific MAC addresses only and block all other MAC addresses. MAC filtering is commonly used in wireless networks but is considered insecure because a MAC address can be spoofed. However, in a wired network, it is more secure because it would be more difficult for a rogue computer to sniff a MAC address. 



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