Which type of password provides maximum security because a new password is required for each new log- on?
Correct Answer: A
Section: Access Control Explanation/Reference: "one-time password" provides maximum security because a new password is required for each new log-on. Source: KRUTZ, Ronald L. & VINES, Russel D., The CISSP Prep Guide: Mastering the Ten Domains of Computer Security, 2001, John Wiley & Sons, Page 36.
Question 268
Which layer of the TCP/IP protocol stack corresponds to the ISO/OSI Network layer (layer 3)?
Correct Answer: B
Explanation/Reference: The Internet layer in the TCP/IP protocol stack corresponds to the network layer (layer 3) in the OSI/ISO model. The host-to-host layer corresponds to the transport layer (layer 4) in the OSI/ISO model. The Network access layer corresponds to the data link and physical layers (layers 2 and 1) in the OSI/ISO model. The session layer is not defined in the TCP/IP protocol stack. Source: WALLHOFF, John, CBK#2 Telecommunications and Network Security (CISSP Study Guide), April 2002 (page 1).
Question 269
The Terminal Access Controller Access Control System (TACACS) employs which of the following?
Correct Answer: A
For networked applications, the Terminal Access Controller Access Control System (TACACS) employs a user ID and a static password for network access. Source: KRUTZ, Ronald L. & VINES, Russel D., The CISSP Prep Guide: Mastering the Ten Domains of Computer Security, 2001, John Wiley & Sons, Page 44.
Question 270
What is a TFTP server most useful for?
Correct Answer: A
A Trivial File Transfer Protocol (TFTP) server can be used when configuring network devices to transfer configurations to and from network devices. Many networking devices now support TFTP. Source: KRUTZ, Ronald L. & VINES, Russel D., The CISSP Prep Guide: Mastering the Ten Domains of Computer Security, John Wiley & Sons, 2001, Chapter 3: Telecommunications and Network Security (page 73).
Question 271
Which of the following ASYMMETRIC encryption algorithms is based on the difficulty of FACTORING LARGE NUMBERS?
Correct Answer: C
Section: Cryptography Explanation/Reference: Named after its inventors Ron Rivest , Adi Shamir and Leonard Adleman is based on the difficulty of factoring large prime numbers. Factoring a number means representing it as the product of prime numbers. Prime numbers, such as 2, 3, 5, 7, 11, and 13, are those numbers that are not evenly divisible by any smaller number, except 1. A non-prime, or composite number, can be written as the product of smaller primes, known as its prime factors. 665, for example is the product of the primes 5, 7, and 19. A number is said to be factored when all of its prime factors are identified. As the size of the number increases, the difficulty of factoring increases rapidly. The other answers are incorrect because: El Gamal is based on the discrete logarithms in a finite field. Elliptic Curve Cryptosystems (ECCs) computes discrete logarithms of elliptic curves. International Data Encryption Algorithm (IDEA) is a block cipher and operates on 64 bit blocks of data and is a SYMMETRIC algorithm. Reference : Shon Harris , AIO v3 , Chapter-8 : Cryptography , Page : 638
