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Q461. An administrator connects VoIP phones to the same switch as the network PCs and printers. Which of the following would provide the BEST logical separation of these three device types while still allowing traffic between them via ACL?
A. Create three VLANs on the switch connected to a router
B. Define three subnets, configure each device to use their own dedicated IP address range, and then connect the network to a router
C. Install a firewall and connect it to the switch
D. Install a firewall and connect it to a dedicated switch for each device type
Answer: A
Explanation:
A virtual local area network (VLAN) is a hardware-imposed network segmentation created by switches. VLANs are used for traffic management. Communications between ports within the same VLAN occur without hindrance, but communications between VLANs require a routing function.
Q462. Which of the following is an effective way to ensure the BEST temperature for all equipment within a datacenter?
A. Fire suppression
B. Raised floor implementation
C. EMI shielding
D. Hot or cool aisle containment
Answer: D
Explanation:
There are often multiple rows of servers located in racks in server rooms. The rows of servers are known as aisles, and they can be cooled as hot aisles and cold aisles. With a hot aisle, hot air outlets are used to cool the equipment, whereas with cold aisles, cold air intake is used to cool the equipment. Combining the two, you have cold air intake from below the aisle and hot air outtake above it, providing constant circulation. This is a more effective way of controlling temperature to safeguard your equipment in a data center.
Q463. A user ID and password together provide which of the following?
A. Authorization
B. Auditing
C. Authentication
D. Identification
Answer: C
Explanation:
Authentication generally requires one or more of the following:
Something you know: a password, code, PIN, combination, or secret phrase.
Something you have: a smart card, token device, or key.
Something you are: a fingerprint, a retina scan, or voice recognition; often referred to as
biometrics, discussed later in this chapter.
Somewhere you are: a physical or logical location.
Something you do: typing rhythm, a secret handshake, or a private knock.
Q464. Key cards at a bank are not tied to individuals, but rather to organizational roles. After a break in, it becomes apparent that extra efforts must be taken to successfully pinpoint who exactly enters secure areas. Which of the following security measures can be put in place to mitigate the issue until a new key card system can be installed?
A. Bollards
B. Video surveillance
C. Proximity readers
D. Fencing
Answer: B
Explanation:
Video surveillance is making use of a camera, or CCTV that is able to record everything it sees and is always running. This way you will be able to check exactly who enters secure areas.
Q465. A security engineer is given new application extensions each month that need to be secured prior to implementation. They do not want the new extensions to invalidate or interfere with existing application security. Additionally, the engineer wants to ensure that the new requirements are approved by the appropriate personnel. Which of the following should be in place to meet these two goals? (Select TWO).
A. Patch Audit Policy
B. Change Control Policy
C. Incident Management Policy
D. Regression Testing Policy
E. Escalation Policy
F. Application Audit Policy
Answer: B,D
Explanation:
A backout (regression testing) is a reversion from a change that had negative consequences. It could be, for example, that everything was working fi ne until you installed a service pack on a production machine, and then services that were normally available were no longer accessible. The backout, in this instance, would revert the system to the state that it was in before the service pack was applied. Backout plans can include uninstalling service packs, hotfi xes, and patches, but they can also include reversing a migration and using previous firmware. A key component to creating such a plan is identifying what events will trigger your implementing the backout. A change control policy refers to the structured approach that is followed to secure a company’s assets in the event of changes occurring.
Q466. When a new network drop was installed, the cable was run across several fluorescent lights. The users of the new network drop experience intermittent connectivity. Which of the following environmental controls was MOST likely overlooked during installation?
A. Humidity sensors
B. EMI shielding
C. Channel interference
D. Cable kinking
Answer: B
Explanation:
Shielding refers to the process of preventing electronic emissions from your computer systems from being used to gather intelligence and preventing outside electronic emissions from disrupting your information-processing abilities. In this case you are experiencing intermittent connectivity since Electro Magnetic Interference (EMI) was not taken into account when running the cables over fluorescent lighting.
Q467. In order for network monitoring to work properly, you need a PC and a network card running in what mode?
A. Launch
B. Exposed
C. Promiscuous
D. Sweep
Answer: C
Explanation:
Promiscuous mode allows the network card to look at any packet that it sees on the network. This even includes packets that are not addressed to that network card.
Q468. Which of the following MOST interferes with network-based detection techniques?
A. Mime-encoding
B. SSL
C. FTP
D. Anonymous email accounts
Answer: B
Explanation:
Secure Sockets Layer (SSL) is used to establish secure TCP communication between two machines by encrypting the communication. Encrypted communications cannot easily be inspected for anomalies by network-based intrusion detection systems (NIDS).
Q469. Pete, the system administrator, wants to restrict access to advertisements, games, and gambling web sites. Which of the following devices would BEST achieve this goal?
A. Firewall
B. Switch
C. URL content filter
D. Spam filter
Answer: C
Explanation:
URL filtering, also known as web filtering, is the act of blocking access to a site based on all or part of the URL used to request access. URL filtering can focus on all or part of a fully qualified domain name (FQDN), specific path names, specific filenames, specific fi le extensions, or entire specific URLs. Many URL-filtering tools can obtain updated master URL block lists from vendors as well as allow administrators to add or remove URLs from a custom list.
Q470. A security administrator notices large amounts of traffic within the network heading out to an external website. The website seems to be a fake bank site with a phone number that when called, asks for sensitive information. After further investigation, the security administrator notices that a fake link was sent to several users. This is an example of which of the following attacks?
A. Vishing
B. Phishing
C. Whaling
D. SPAM
E. SPIM
Answer: B
Explanation:
Phishing is the act of sending an email to a user falsely claiming to be an established legitimate enterprise in an attempt to scam the user into surrendering private information that will be used for identity theft. Phishing email will direct the user to visit a website where they are asked to update personal information, such as a password, credit card, social security, or bank account numbers, that the legitimate organization already has. The website, however, is bogus and set up only to steal the information the user enters on the page. Phishing emails are blindly sent to thousands, if not millions of recipients. By spamming large groups of people, the "phisher" counts on the email being read by a percentage of people who actually have an account with the legitimate company being spoofed in the email and corresponding webpage. Phishing, also referred to as brand spoofing or carding, is a variation on "fishing," the idea being that bait is thrown out with the hopes that while most will ignore the bait, some will be tempted into biting.
