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NEW QUESTION: 1
At which of the basic phases of the System Development Life Cycle are security requirements formalized?
A. Functional Requirements Definition
B. Development and Implementation
C. System Design Specifications
D. Disposal
Answer: A
Explanation:
During the Functional Requirements Definition the project management and systems development teams will conduct a comprehensive analysis of current and possible future functional requirements to ensure that the new system will meet end-user needs. The teams also review the documents from the project initiation phase and make any revisions or updates as needed. For smaller projects, this phase is often subsumed in the project initiation phase. At this point security requirements should be formalized.
The Development Life Cycle is a project management tool that can be used to plan, execute, and control a software development project usually called the Systems Development Life Cycle (SDLC).
The SDLC is a process that includes systems analysts, software engineers, programmers, and end users in the project design and development. Because there is no industry-wide SDLC, an organization can use any one, or a combination of SDLC methods.
The SDLC simply provides a framework for the phases of a software development project from defining the functional requirements to implementation. Regardless of the method used, the SDLC outlines the essential phases, which can be shown together or as separate elements. The model chosen should be based on the project.
For example, some models work better with long-term, complex projects, while others are more suited for short-term projects. The key element is that a formalized SDLC is utilized.
The number of phases can range from three basic phases (concept, design, and implement) on
up.
The basic phases of SDLC are:
Project initiation and planning
Functional requirements definition
System design specifications
Development and implementation
Documentation and common program controls
Testing and evaluation control, (certification and accreditation)
Transition to production (implementation)
The system life cycle (SLC) extends beyond the SDLC to include two additional phases:
Operations and maintenance support (post-installation)
Revisions and system replacement
System Design Specifications
This phase includes all activities related to designing the system and software. In this phase, the
system architecture, system outputs, and system interfaces are designed. Data input, data flow,
and output requirements are established and security features are designed, generally based on
the overall security architecture for the company.
Development and Implementation
During this phase, the source code is generated, test scenarios and test cases are developed, unit
and integration testing is conducted, and the program and system are documented for
maintenance and for turnover to acceptance testing and production. As well as general care for
software quality, reliability, and consistency of operation, particular care should be taken to ensure
that the code is analyzed to eliminate common vulnerabilities that might lead to security exploits
and other risks.
Documentation and Common Program Controls
These are controls used when editing the data within the program, the types of logging the
program should be doing, and how the program versions should be stored. A large number of
such controls may be needed, see the reference below for a full list of controls.
Acceptance
In the acceptance phase, preferably an independent group develops test data and tests the code
to ensure that it will function within the organization's environment and that it meets all the
functional and security requirements. It is essential that an independent group test the code during
all applicable stages of development to prevent a separation of duties issue. The goal of security
testing is to ensure that the application meets its security requirements and specifications. The
security testing should uncover all design and implementation flaws that would allow a user to
violate the software security policy and requirements. To ensure test validity, the application
should be tested in an environment that simulates the production environment. This should include a security certification package and any user documentation. Certification and Accreditation (Security Authorization) Certification is the process of evaluating the security stance of the software or system against a predetermined set of security standards or policies. Certification also examines how well the system performs its intended functional requirements. The certification or evaluation document should contain an analysis of the technical and nontechnical security features and countermeasures and the extent to which the software or system meets the security requirements for its mission and operational environment. Transition to Production (Implementation) During this phase, the new system is transitioned from the acceptance phase into the live production environment. Activities during this phase include obtaining security accreditation; training the new users according to the implementation and training schedules; implementing the system, including installation and data conversions; and, if necessary, conducting any parallel operations.
Revisions and System Replacement As systems are in production mode, the hardware and software baselines should be subject to periodic evaluations and audits. In some instances, problems with the application may not be defects or flaws, but rather additional functions not currently developed in the application. Any changes to the application must follow the same SDLC and be recorded in a change management system. Revision reviews should include security planning and procedures to avoid future problems. Periodic application audits should be conducted and include documenting security incidents when problems occur. Documenting system failures is a valuable resource for justifying future system enhancements. Below you have the phases used by NIST in it's 800-63 Revision 2 document
As noted above, the phases will vary from one document to another one. For the purpose of the exam use the list provided in the official ISC2 Study book which is presented in short form above. Refer to the book for a more detailed description of activities at each of the phases of the SDLC.
However, all references have very similar steps being used. As mentioned in the official book, it could be as simple as three phases in it's most basic version (concept, design, and implement) or a lot more in more detailed versions of the SDLC.
The key thing is to make use of an SDLC.
SDLC phases Reference(s) used for this question: NIST SP 800-64 Revision 2 at http://csrc.nist.gov/publications/nistpubs/800-64-Rev2/SP800-64Revision2.pdf and Schneiter, Andrew (2013-04-15). Official (ISC)2 Guide to the CISSP CBK, Third Edition: Software Development Security ((ISC)2 Press) (Kindle Locations 134-157). Auerbach Publications. Kindle Edition.
NEW QUESTION: 2
Refer to the exhibit.
Assume that all router interfaces are operational and correctly configured. In addition, assume that OSPF has been
correctly configured on router R2. How will the default route configured on R1 affect the operation of R2?
A. Any packet destined for a network that is not directly connected to router R2 will be dropped immediately.
B. Any packet destined for a network that is not referenced in the routing table of router R2 will be directed to R1. R1
will then send that packet back to R2 and a routing loop will occur.
C. Any packet destined for a network that is not directly connected to router R2 will be dropped immediately because
of the lack of a gateway on R1.
D. Any packet destined for a network that is not directly connected to router R1 will be dropped.
E. The networks directly connected to router R2 will not be able to communicate with the 172.16.100.0,
172.16.100.128, and 172.16.100.64 subnetworks.
Answer: B
Explanation:
First, notice that the more-specific routes will always be favored over less-specific routes regardless of the
administrative distance set for a protocol. In this case, because we use OSPF for three networks (172.16.100.0 0.0.0.3,
172.16.100.64 0.0.0.63, 172.16.100.128 0.0.0.31) so the packets destined for these networks will not be affected by
the default route. The default route configured on R1 "ip route 0.0.0.0 0.0.0.0 serial0/0 will send any packet whose
destination network is not referenced in the routing table of router R1 to R2, it doesn't drop anything so answers A, B
and C are not correct. D is not correct too because these routes are declared in R1 and the question says that "OSPF
has been correctly configured on router R2, so network directly connected to router R2 can communicate with those
three subnetworks. As said above, the default route configured on R1 will send any packet destined for a network that
is not referenced in its routing table to R2; R2 in turn sends it to R1 because it is the only way and a routing loop will
occur.
NEW QUESTION: 3
What should a company do first when disposing of personal computers that once were used to store confidential data?
A. Delete all data contained on the hard disk
B. Low level format the hard disk
C. Demagnetize the hard disk
D. Overwrite all data on the hard disk with zeroes
Answer: C
NEW QUESTION: 4
By default, what type of SSH server key is generated by Cisco NX-OS Software?
A. RSA key generated with 1024 bits
B. RSA key generated with 2048 bits
C. DSA key generated with 512 bits
D. RSA key generated with 768 bits
E. DSA key generated with 1024 bits
Answer: A
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