Which LAN transmission method below describes a packet sent from a single source to multiple specific destinations?
Correct Answer: A
The correct answer is multicast. Unicast describes a packet sent from a single source to a single destination. Broadcast describes a packet sent to all nodes on the network segment. Anycast, refers to communication between any sender and the nearest of a group of receivers in a network.
Question 432
A one-way hash provides which of the following?
Correct Answer: C
A one-way hash is a function that takes a variable-length string a message, and compresses and transforms it into a fixed length value referred to as a hash value. It provides integrity, but no confidentiality, availability or authentication. Source: WALLHOFF, John, CBK#5 Cryptography (CISSP Study Guide), April 2002 (page 5).
Question 433
Which of the following biometric devices offers the LOWEST CER?
Correct Answer: C
From most effective (lowest CER) to least effective (highest CER) are: Iris scan, fingerprint, voice verification, keystroke dynamics. Reference : Shon Harris Aio v3 , Chapter-4 : Access Control , Page : 131 Also see: http://www.sans.org/reading_room/whitepapers/authentication/biometric- selection-body-parts-online_139
Question 434
Which of the following server contingency solutions offers the highest availability?
Correct Answer: D
Explanation/Reference: Explanation: With load balancing, often through clustering, each system takes a part of the processing load, and if one system fails there is an automatic failover to the other systems which continue to work. This guarantees a high availability of the service. Incorrect Answers: A: Systems backups only protects against data loss. It does not product a failure of server. B: Electronic vaulting and remote journaling are transaction redundancy solutions. It protect the system by copying transaction information to a remote location. In case of server failure the database can be restored, but it would require a rebuild of the database. C: RAID protects against a hard disk failures, but it does not protect against other type of server failures. References: Harris, Shon, All In One CISSP Exam Guide, 6th Edition, McGraw-Hill, 2013, p. 1272
Question 435
DESX is a variant of DES in which:
Correct Answer: B
DESX was developed by Ron Rivest to increase the resistance of DES to brute force key search attacks; however, the resistance of DESX to differential and linear attacks is equivalent to that of DES with independent subkeys.
