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| Section | Weight | Objectives |
|---|---|---|
| Security and Risk Management | 14% | - Security Governance Principles - Compliance and Legal Requirements - Professional Ethics |
| Security Operations | 13% | - Incident Response - Disaster Recovery and Business Continuity |
| Security Architecture and Engineering | 13% | - Secure Design Principles - Security Models and Frameworks |
| Security Assessment and Testing | 12% | - Audit Processes - Security Testing Methods |
| Asset Security | 10% | - Information and Asset Classification - Data Lifecycle Management |
| Communication and Network Security | 13% | - Network Architecture and Design - Secure Network Components |
| Identity and Access Management (IAM) | 13% | - Authentication and Authorization - Identity Lifecycle Management |
| Software Development Security | 11% | - Application Security Controls - Secure Software Development Lifecycle (SDLC) |
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質問 # 949
Which of the following is more suitable for a hardware implementation?
正解:A
解説:
Explanation/Reference:
Explanation:
Stream ciphers require a lot of randomness and encrypt individual bits at a time. This requires more processing power than block ciphers require, which is why stream ciphers are better suited to be implemented at the hardware level. Because block ciphers do not require as much processing power, they can be easily implemented at the software level.
Incorrect Answers:
B: Block ciphers can be easily implemented at the software level because they do not require as much processing power as stream ciphers.
C: Cipher block chaining is a block encryption method where each block of text, the key, and the value based on the previous block are processed in the algorithm and applied to the next block of text. Cipher block chaining is not more suitable for a hardware implementation.
D: Electronic code book is a block encryption method. It is not more suitable for a hardware implementation.
References:
Harris, Shon, All In One CISSP Exam Guide, 6th Edition, McGraw-Hill, 2013, p. 791
質問 # 950
Which of the following is the MOST significant key management problem due to the number of keys created?
正解:B
質問 # 951
Good forensics requires the use of a bit level copy?(True/False)
正解:B
解説:
Good forensics requires the use of a bit level copy. A bit level copy duplicates all information on the suspect's disk. This includes slack space and free space.
質問 # 952
Layer 2 of the OSI model has two sublayers. What are those sublayers, and what are two IEEE standards that describe technologies at that layer?
正解:C
解説:
The data link layer, or Layer 2, of the OSI model is responsible for adding a header and a trailer to a packet to prepare the packet for the local area network or wide area network technology binary format for proper line transmission. Layer 2 is divided into two functional sublayers.
The upper sublayer is the Logical Link Control (LLC) and is defined in the IEEE 8022 specification.
It communicates with the network layer, which is immediately above the data link layer.
Below the LLC is the Media Access Control (MAC) sublayer, which specifies the interface with the
protocol requirements of the physical layer.
Thus, the specification for this layer depends on the technology of the physical layer.
The IEEE MAC specification for Ethernet is 8023, Token Ring is 8025, wireless LAN is 80211, and
so on. When you see a reference to an IEEE standard, such as 80211 or 80216, it refers to the
protocol working at the MAC sublayer of the data link layer of the protocol stack.
The following answers are incorrect:
LCL and MAC; IEEE 8022 and 8023 is incorrect because LCL is a distracter. The correct acronym
for the upper sublayer of the data link layer is LLC. It stands for the Logical Link Control. By
providing multiplexing and flow control mechanisms, the LLC enables the coexistence of network
protocols within a multipoint network and their transportation over the same network media.
LCL and MAC; IEEE 8021 and 8023 is incorrect because LCL is a distracter. The sublayers of the
data link layer are the Logical Link Control (LLC) and the Media Access Control (MAC).
Furthermore, the LLC is defined in the IEEE 8022 specification, not 8021 The IEEE 8021
specifications are concerned with protocol layers above the MAC and LLC layers. It addresses
LAN/MAN architecture, network management, internetworking between LANs and WANs, and link
security, etc.
Network and MAC; IEEE 8021 and 8023 is incorrect because network is not a sublayer of the data
link layer. The sublayers of the data link layer are the Logical Link Control (LLC) and the Media
Access Control (MAC). The LLC sits between the network layer (the layer immediately above the
data link layer) and the MAC sublayer. Also, the LLC is defined in the IEEE 8022 specification,not
IEEE 8021 As just explained, 8021 standards address areas of LAN/MAN architecture, network
management, internetworking between LANs and WANs, and link security.The IEEE 8021 group's
four active task groups are Internetworking, Security, Audio/Video Bridging, and Data Center
Bridging.
The following reference(s) were/was used to create this question:
http://en.wikipedia.org/wiki/OSI_model
質問 # 953
Which of the following binds a subject name to a public key value?
正解:A
解説:
Remember the term Public-Key Certificate is synonymous with Digital
Certificate or Identity certificate.
The certificate itself provides the binding but it is the certificate authority who will go through the Certificate Practice Statements (CPS) actually validating the bindings and vouch for the identity of the owner of the key within the certificate.
As explained in Wikipedia:
In cryptography, a public key certificate (also known as a digital certificate or identity certificate) is an electronic document which uses a digital signature to bind together a public key with an identity - information such as the name of a person or an organization, their address, and so forth. The certificate can be used to verify that a public key belongs to an individual.
In a typical public key infrastructure (PKI) scheme, the signature will be of a certificate authority (CA). In a web of trust scheme such as PGP or GPG, the signature is of either the user (a self-signed certificate) or other users ("endorsements") by getting people to sign each other keys. In either case, the signatures on a certificate are attestations by the certificate signer that the identity information and the public key belong together.
RFC 2828 defines the certification authority (CA) as:
An entity that issues digital certificates (especially X.509 certificates) and vouches for the binding between the data items in a certificate.
An authority trusted by one or more users to create and assign certificates. Optionally, the certification authority may create the user's keys.
X509 Certificate users depend on the validity of information provided by a certificate. Thus, a CA should be someone that certificate users trust, and usually holds an official position created and granted power by a government, a corporation, or some other organization. A
CA is responsible for managing the life cycle of certificates and, depending on the type of certificate and the CPS that applies, may be responsible for the life cycle of key pairs associated with the certificates
Source: SHIREY, Robert W., RFC2828: Internet Security Glossary, may 2000.
and
http://en.wikipedia.org/wiki/Public_key_certificate
質問 # 954
......
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