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Employers
A. sometimes advocate on behalf of their employees in benefit disputes and appeals, answer questions with regard to the health plan, and generally help them navigate their health benefits.
B. never advocate on behalf of their employees in benefit disputes and appeals, answer questions with regard to health plan, and generally help them navigate their health benefits.
C. often advocate on behalf of their employees in benefit disputes and appeals, answer questions with regard to the health plan, and generally help them navigate their health benefits.
D. are prohibited by plan sponsors from advocating on behalf of group health plan participants or providing assistance in understanding their health plan.
Answer: C
NEW QUESTION # 660
From an asset security perspective, what is the BEST countermeasure to prevent data theft due to data remanence when a sensitive data storage media is no longer needed?
A. Delete the sensitive data from the media.
B. Physically destroy the retired media.
C. Encrypt data before it Is stored on the media.
D. Return the media to the system owner.
Answer: B
NEW QUESTION # 661
Which of the following is an extension to Network Address Translation that permits multiple devices providing services on a local area network (LAN) to be mapped to a single public IP address?
A. IP Spoofing
B. Port address translation
C. IP Distribution
D. IP subnetting
Answer: B
Explanation:
Port Address Translation (PAT), is an extension to network address translation (NAT) that permits multiple devices on a local area network (LAN) to be mapped to a single public IP address. The goal of PAT is to conserve IP addresses or to publish multiple hosts with service to the internet while having only one single IP assigned on the external side of your gateway. Most home networks use PAT. In such a scenario, the Internet Service Provider (ISP) assigns a single IP address to the home network's router. When Computer X logs on the Internet, the router assigns the client a port number, which is appended to the internal IP address. This, in effect, gives Computer X a unique address. If Computer Z logs on the Internet at the same time, the router assigns it the same local IP address with a different port number. Although both computers are sharing the same public IP address and accessing the Internet at the same time, the router knows exactly which computer to send specific packets to because each computer has a unique internal address.
Port Address Translation is also called porting, port overloading, port-level multiplexed NAT and
single address NAT.
Shon Harris has the following example in her book:
The company owns and uses only one public IP address for all systems that need to communicate
outside the internal network. How in the world could all computers use the exact same IP
address? Good question. Here's an example: The NAT device has an IP address of 127.50.41.3.
When computer A needs to communicate with a system on the Internet, the NAT device
documents this computer's private address and source port number (10.10.44.3; port 43,887). The
NAT device changes the IP address in the computer's packet header to 127.50.41.3, with the
source port 40,000. When computer B also needs to communicate with a system on the Internet,
the NAT device documents the private address and source port number (10.10.44.15; port 23,398)
and changes the header information to 127.50.41.3 with source port 40,001. So when a system
responds to computer A, the packet first goes to the NAT device, which looks up the port number
40,000 and sees that it maps to computer A's real information. So the NAT device changes the
header information to address 10.10.44.3 and port 43,887 and sends it to computer A for
processing. A company can save a lot more money by using PAT, because the company needs to
buy only a few public IP addresses, which are used by all systems in the network.
As mentioned on Wikipedia:
NAT is also known as Port Address Translation: is a feature of a network device that translate
TCP or UDP communications made between host on a private network and host on a public
network. I allows a single public IP address to be used by many host on private network which is
usually a local area network LAN
NAT effectively hides all TCP/IP-level information about internal hosts from the Internet.
The following were all incorrect answer:
IP Spoofing - In computer networking, the term IP address spoofing or IP spoofing refers to the
creation of Internet Protocol (IP) packets with a forged source IP address, called spoofing, with the
purpose of concealing the identity of the sender or impersonating another computing system.
Subnetting - Subnetting is a network design strategy that segregates a larger network into smaller
components. While connected through the larger network, each subnetwork or subnet functions
with a unique IP address. All systems that are assigned to a particular subnet will share values
that are common for both the subnet and for the network as a whole.
A different approach to network construction can be thought of as subnetting in reverse. Known as
CIDR, or Classless Inter-Domain Routing, this approach also creates a series of subnetworks.
Rather than dividing an existing network into small components, CIDR takes smaller components
and connects them into a larger network. This can often be the case when a business is acquired
by a larger corporation. Instead of doing away with the network developed and used by the newly
acquired business, the corporation chooses to continue operating that network as a subsidiary or
an added component of the corporation's network. In effect, the system of the purchased entity
becomes a subnet of the parent company's network.
IP Distribution - This is a generic term which could mean distribution of content over an IP network
or distribution of IP addresses within a Company. Sometimes people will refer to this as Internet
Protocol address management (IPAM) is a means of planning, tracking, and managing the Internet
Protocol address space used in a network. Most commonly, tools such as DNS and DHCP are
used in conjunction as integral functions of the IP address management function, and true IPAM
glues these point services together so that each is aware of changes in the other (for instance
DNS knowing of the IP address taken by a client via DHCP, and updating itself accordingly).
Additional functionality, such as controlling reservations in DHCP as well as other data
aggregation and reporting capability, is also common. IPAM tools are increasingly important as
new IPv6 networks are deployed with larger address pools, different subnetting techniques, and
more complex 128-bit hexadecimal numbers which are not as easily human-readable as IPv4
addresses.
Reference(s) used for this question:
STREBE, Matthew and PERKINS, Charles, Firewalls 24seven, Sybex 2000, Chapter 1:
Understanding Firewalls.
Schneiter, Andrew (2013-04-15). Official (ISC)2 Guide to the CISSP CBK, Third Edition :
Telecommunications and Network Security, Page 350.
Harris, Shon (2012-10-25). CISSP All-in-One Exam Guide, 6th Edition (Kindle Locations 12765-
12774). Telecommunications and Network Security, Page 604-606 http://searchnetworking.techtarg ... ess-Translation-PAT http://en.wikipedia.org/wiki/IP_address_spoofing http://www.wisegeek.com/what-is-subnetting.htm http://en.wikipedia.org/wiki/IP_address_management
NEW QUESTION # 662
In the Bell-LaPadula model, the Star-property is also called:
A. The confidentiality property
B. The tranquility property
C. The confinement property
D. The simple security property
Answer: C
Explanation:
The Bell-LaPadula model focuses on data confidentiality and access to classified information, in contrast to the Biba Integrity Model which describes rules for the protection of data integrity. In this formal model, the entities in an information system are divided into subjects and objects.
The notion of a "secure state" is defined, and it is proven that each state transition preserves security by moving from secure state to secure state, thereby proving that the system satisfies the security objectives of the model.
The Bell-LaPadula model is built on the concept of a state machine with a set of allowable states in a system. The transition from one state to another state is defined by transition functions.
A system state is defined to be "secure" if the only permitted access modes of subjects to objects are in accordance with a security policy. To determine whether a specific access mode is allowed, the clearance of a subject is compared to the classification of the object (more precisely, to the combination of classification and set of compartments, making up the security level) to determine if the subject is authorized for the specific access mode.
The clearance/classification scheme is expressed in terms of a lattice. The model defines two mandatory access control (MAC) rules and one discretionary access control (DAC) rule with three security properties:
The Simple Security Property - a subject at a given security level may not read an object at a higher security level (no read-up).
The *-property (read "star"-property) - a subject at a given security level must not write to any object at a lower security level (no write-down). The *-property is also known as the Confinement property.
The Discretionary Security Property - use an access control matrix to specify the discretionary access control.
The transfer of information from a high-sensitivity document to a lower-sensitivity document may happen in the Bell-LaPadula model via the concept of trusted subjects. Trusted Subjects are not restricted by the *-property. Untrusted subjects are. Trusted Subjects must be shown to be trustworthy with regard to the security policy. This security model is directed toward access control and is characterized by the phrase: "no read up, no write down." Compare the Biba model, the Clark-Wilson model and the Chinese Wall.
With Bell-LaPadula, users can create content only at or above their own security level (i.e. secret researchers can create secret or top-secret files but may not create public files; no write-down). Conversely, users can view content only at or below their own security level (i.e. secret researchers can view public or secret files, but may not view top-secret files; no read-up). Strong * Property
The Strong * Property is an alternative to the *-Property in which subjects may write to objects with only a matching security level. Thus, the write-up operation permitted in the usual *-Property is not present, only a write-to-same level operation. The Strong * Property is usually discussed in the context of multilevel database management systems and is motivated by integrity concerns. Tranquility principle
The tranquility principle of the Bell-LaPadula model states that the classification of a subject or object does not change while it is being referenced. There are two forms to the tranquility principle: the "principle of strong tranquility" states that security levels do not change during the normal operation of the system and the "principle of weak tranquility" states that security levels do not change in a way that violates the rules of a given security policy.
Another interpretation of the tranquility principles is that they both apply only to the period of time during which an operation involving an object or subject is occurring. That is, the strong tranquility principle means that an object's security level/label will not change during an operation (such as read or write); the weak tranquility principle means that an object's security level/label may change in a way that does not violate the security policy during an operation.
Reference(s) used for this question: http://en.wikipedia.org/wiki/Biba_Modelhttp://en.wikipedia.org/wiki/Mandatory_access_controlhttp://en.wikipedia.org/wiki/Discretionary_access_controlhttp://en.wikipedia.org/wiki/Clark-Wilson_model http://en.wikipedia.org/wiki/Brewer_and_Nash_model
NEW QUESTION # 663
Which of the following is NOT a precaution you can take to reduce static electricity?
A. power line conditioning
B. anti-static sprays
C. anti-static flooring
D. maintain proper humidity levels
Answer: A
Explanation:
Explanation/Reference:
Explanation:
Power line conditioning is not a precaution you can take to reduce static electricity.
Some precautions you can take to reduce static electricity damage are:
Use anti-static sprays where possible.
Operations or computer centers should have anti-static flooring.
Building and computer rooms should be grounded properly.
Anti-static table or floor mats may be used.
HVAC should maintain the proper level of relative humidity in computer rooms.
Fire Detection and Suppression
Incorrect Answers:
B: Anti-static sprays are a precaution you can take to reduce static electricity. Therefore, this answer is incorrect.
C: Maintaining proper humidity levels is a precaution you can take to reduce static electricity. Therefore, this answer is incorrect.
D: Anti-static flooring is a precaution you can take to reduce static electricity. Therefore, this answer is incorrect.
References:
Krutz, Ronald L. and Russell Dean Vines, The CISSP and CAP Prep Guide: Mastering CISSP and CAP, Wiley Publishing, Indianapolis, 2007, p. 460
NEW QUESTION # 664
......
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