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NEW QUESTION: 1
During which phase of an IT system life cycle are security requirements developed?
A. Initiation
B. Implementation
C. Operation
D. Functional design analysis and Planning
Answer: D
Explanation:
The software development life cycle (SDLC) (sometimes referred to as the System Development Life Cycle) is the process of creating or altering software systems, and the models and methodologies that people use to develop these systems.
The NIST SP 800-64 revision 2 has within the description section of para 3.2.1:
This section addresses security considerations unique to the second SDLC phase. Key security
activities for this phase include:
Conduct the risk assessment and use the results to supplement the baseline security controls;
Analyze security requirements;
Perform functional and security testing;
Prepare initial documents for system certification and accreditation; and
Design security architecture.
Reviewing this publication you may want to pick development/acquisition. Although initiation would be a decent choice, it is correct to say during this phase you would only brainstorm the idea of security requirements. Once you start to develop and acquire hardware/software components then you would also develop the security controls for these. The Shon Harris reference below is correct as well.
Shon Harris' Book (All-in-One CISSP Certification Exam Guide) divides the SDLC differently:
-Project initiation
-Functional design analysis and planning
-System design specifications
-Software development
-Installation
-Maintenance support
-Revision and replacement
According to the author (Shon Harris), security requirements should be developed during the functional design analysis and planning phase. SDLC POSITIONING FROM NIST 800-64
SDLC Positioning in the enterprise Information system security processes and activities provide valuable input into managing IT systems and their development, enabling risk identification, planning and mitigation. A risk management approach involves continually balancing the protection of agency information and assets with the cost of security controls and mitigation strategies throughout the complete information system development life cycle (see Figure 2-1 above). The most effective way to implement risk management is to identify critical assets and operations, as well as systemic vulnerabilities across the agency. Risks are shared and not bound by organization, revenue source, or topologies. Identification and verification of critical assets and operations and their interconnections can be achieved through the system security planning process, as well as through the compilation of information from the Capital Planning and Investment Control (CPIC) and Enterprise Architecture (EA) processes to establish insight into the agency's vital business operations, their supporting assets, and existing interdependencies and relationships.
With critical assets and operations identified, the organization can and should perform a business
impact analysis (BIA). The purpose of the BIA is to relate systems and assets with the critical
services they provide and assess the consequences of their disruption. By identifying these
systems, an agency can manage security effectively by establishing priorities. This positions the
security office to facilitate the IT program's cost-effective performance as well as articulate its
business impact and value to the agency.
SDLC OVERVIEW FROM NIST 800-64
SDLC Overview from NIST 800-64 Revision 2
NIST 800-64 Revision 2 is one publication within the NISTstandards that I would recommend you
look at for more details about the SDLC. It describe in great details what activities would take
place and they have a nice diagram for each of the phases of the SDLC. You will find a copy at:
http://csrc.nist.gov/publications/nistpubs/800-64-Rev2/SP800-64-Revision2.pdf
DISCUSSION:
Different sources present slightly different info as far as the phases names are concerned.
People sometimes gets confused with some of the NIST standards. For example NIST 800-64
Security Considerations in the Information System Development Life Cycle has slightly different
names, the activities mostly remains the same.
NIST clearly specifies that Security requirements would be considered throughout ALL of the
phases. The keyword here is considered, if a question is about which phase they would be
developed than Functional Design Analysis would be the correct choice.
Within the NIST standard they use different phase, howeverr under the second phase you will see
that they talk specifically about Security Functional requirements analysis which confirms it is not
at the initiation stage so it become easier to come out with the answer to this question. Here is
what is stated:
The security functional requirements analysis considers the system security environment,
including the enterprise information security policy and the enterprise security architecture. The
analysis should address all requirements for confidentiality, integrity, and availability of
information, and should include a review of all legal, functional, and other security requirements
contained in applicable laws, regulations, and guidance.
At the initiation step you would NOT have enough detailed yet to produce the Security
Requirements. You are mostly brainstorming on all of the issues listed but you do not develop
them all at that stage.
By considering security early in the information system development life cycle (SDLC), you may be
able to avoid higher costs later on and develop a more secure system from the start.
NIST says:
NIST`s Information Technology Laboratory recently issued Special Publication (SP) 800-64,
Security Considerations in the Information System Development Life Cycle, by Tim Grance, Joan
Hash, and Marc Stevens, to help organizations include security requirements in their planning for
every phase of the system life cycle, and to select, acquire, and use appropriate and cost-effective
security controls.
I must admit this is all very tricky but reading skills and paying attention to KEY WORDS is a must
for this exam.
References:
HARRIS, Shon, All-In-One CISSP Certification Exam Guide, McGraw-Hill/Osborne, Fifth Edition,
Page 956
and
NIST S-64 Revision 2 at http://csrc.nist.gov/publications/nistpubs/800-64-Rev2/SP800-64-
Revision2.pdf
and
http://www.mks.com/resources/resource-pages/software-development-life-cycle-sdlc-system-
development
NEW QUESTION: 2
ネットワークエンジニアは、インターネット経由でRTMPを使用して多くの外部ビデオフィードプロバイダーに接続するVPCのプライベートサブネットにアプリケーションを展開します。 NATゲートウェイはパブリックサブネットに展開されており、期待どおりに機能しています。 Amazon EC2インスタンスから、アプリケーションは、接続時にハングする1つを除くすべてのフィードプロバイダーに接続できます。パブリックサブネットのAmazon EC2インスタンスから問題のフィードへの接続を手動でテストすると、フィードが期待どおりに機能していることがわかります。
この問題の原因は何ですか？
A. Amazon EC2インスタンスは、9001のMTUと通信することを想定しています。
B. インターネットゲートウェイは1500バイトのMTUのみをサポートします。
C. インスタンスのセキュリティグループはPMTUDを許可しません。
D. NATゲートウェイは断片化されたパケットをサポートしません。
Answer: D
NEW QUESTION: 3
You have several S3 buckets defined in your AWS account. You need to give access to external AWS accounts to these S3 buckets. Which of the following can allow you to define the permissions for the external accounts? Choose 2 answers from the options given below Please select:
A. 1AM policies
B. Buckets ACL's
C. Bucket policies
D. 1AM users
Answer: B,C
Explanation:
Explanation
The AWS Security whitepaper gives the type of access control and to what level the control can be given
Options A and C are incorrect since for external access to buckets, you need to use either Bucket policies or Bucket ACL's or more information on Security for storage services role please refer to the below URL:
https://d1.awsstatic.com/whitepapers/Security/Security Storage Services Whitepaper.pdf The correct answers are: Buckets ACL's, Bucket policies Submit your Feedback/Queries to our Experts