Explanation/Reference:
Explanation:
An internal hot site is standby ready with all the technology and equipment necessary to run the applications to be recovered there.
Incorrect Answers:
A: An external hot site has equipment on the floor waiting for recovery, but the environment must be rebuilt for the recovery. An external hot site is not standby ready.
B: A warm site is not standby ready. A warm site is a leased or rented facility that is usually partially configured with some equipment, such as HVAC, and foundational infrastructure components, but not the actual computers. In other words, a warm site is usually a hot site without the expensive equipment such as communication equipment and servers.
D: A dual data center is employed for application that canAccept any downtime without unacceptably impacting the business. A dual data center would be more than standby ready, but it would be more expensive.

An application layer firewall can also be called a proxy. "A presentation layer gateway" is incorrect. A gateway connects two unlike environments and is usually required to translate between diffferent types of applications or protocols. This is not the function of a firewall. "A session layer gateway" is incorrect. A gateway connects two unlike environments and is usually required to translate between diffferent types of applications or protocols. This is not the function of a firewall. "A transport layer gateway" is incorrect. A gateway connects two unlike environments and is usually required to translate between diffferent types of applications or protocols. This is not the function of a firewall.
References: CBK, p. 467 AIO3, pp. 486 - 490, 960

Data mining is used to reveal hidden relationships, patterns and trends by running
queries on large data stores.
Data mining is the act of collecting and analyzing large quantities of information to determine
patterns of use or behavior and use those patterns to form conclusions about past, current, or
future behavior. Data mining is typically used by large organizations with large databases of
customer or consumer behavior. Retail and credit companies will use data mining to identify
buying patterns or trends in geographies, age groups, products, or services. Data mining is
essentially the statistical analysis of general information in the absence of specific data.
The following are incorrect answers:
They are incorrect as they all apply to Protecting Objects and the data within them. Layering,
abstraction and data hiding are related concepts that can work together to produce modular
software that implements an organizations security policies and is more reliable in operation.
Layering is incorrect. Layering assigns specific functions to each layer and communication
between layers is only possible through well-defined interfaces. This helps preclude tampering in
violation of security policy. In computer programming, layering is the organization of programming
into separate functional components that interact in some sequential and hierarchical way, with
each layer usually having an interface only to the layer above it and the layer below it.
Abstraction is incorrect. Abstraction "hides" the particulars of how an object functions or stores
information and requires the object to be manipulated through well-defined interfaces that can be
designed to enforce security policy. Abstraction involves the removal of characteristics from an
entity in order to easily represent its essential properties.
Data hiding is incorrect. Data hiding conceals the details of information storage and manipulation
within an object by only exposing well defined interfaces to the information rather than the
information itslef. For example, the details of how passwords are stored could be hidden inside a
password object with exposed interfaces such as check_password, set_password, etc. When a
password needs to be verified, the test password is passed to the check_password method and a
boolean (true/false) result is returned to indicate if the password is correct without revealing any
details of how/where the real passwords are stored. Data hiding maintains activities at different
security levels to separate these levels from each other.
The following reference(s) were used for this question:
Hernandez CISSP, Steven (2012-12-21). Official (ISC)2 Guide to the CISSP CBK, Third Edition
((ISC)2 Press) (Kindle Locations 27535-27540). Auerbach Publications. Kindle Edition.
and
Hernandez CISSP, Steven (2012-12-21). Official (ISC)2 Guide to the CISSP CBK, Third Edition
((ISC)2 Press) (Kindle Locations 4269-4273). Auerbach Publications. Kindle Edition.