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Free SSCP Exam Braindumps (page: 26)

Page 25 of 269
PDF with 1074 Questions

RADIUS incorporates which of the following services?

  1. Authentication server and PIN codes.
  2. Authentication of clients and static passwords generation.
  3. Authentication of clients and dynamic passwords generation.
  4. Authentication server as well as support for Static and Dynamic passwords.

Answer(s): D

Explanation:

A Network Access Server (NAS) operates as a client of RADIUS. The client is responsible for passing user information to
designated RADIUS servers, and then acting on the response which is returned.
RADIUS servers are responsible for receiving user connection requests, authenticating the user, and then returning all
configuration information necessary for the client to deliver service to the user.
RADIUS authentication is based on provisions of simple username/password credentials. These credentials are encrypted
by the client using a shared secret between the client and the RADIUS server. OIG 2007, Page RADIUS incorporates an authentication server and can make uses of both dynamic and static
passwords.
Since it uses the PAP and CHAP protocols, it also incluses static passwords.
RADIUS is an Internet protocol. RADIUS carries authentication, authorization, and configuration information between a Network Access Server and a shared Authentication Server. RADIUS features and functions are described primarily in the IETF (International Engineering Task Force) document RFC2138.
The term " RADIUS" is an acronym which stands for Remote Authentication Dial In User Service.
The main advantage to using a RADIUS approach to authentication is that it can provide a stronger form of authentication. RADIUS is capable of using a strong, two-factor form of authentication, in which users need to possess both a user ID and a hardware or software token to gain access.
Token-based schemes use dynamic passwords. Every minute or so, the token generates a unique 4-, 6- or 8-digit access number that is synchronized with the security server. To gain entry into the system, the user must generate both this one-time number and provide his or her user ID and password.
Although protocols such as RADIUS cannot protect against theft of an authenticated session via some realtime attacks, such as wiretapping, using unique, unpredictable authentication requests can protect against a wide range of active attacks.
RADIUS: Key Features and Benefits
Features Benefits
RADIUS supports dynamic passwords and challenge/response passwords.
Improved system security due to the fact that passwords are not static.
It is much more difficult for a bogus host to spoof users into giving up their passwords or password-generation algorithms.
RADIUS allows the user to have a single user ID and password for all computers in a network.
Improved usability due to the fact that the user has to remember only one login combination.
RADIUS is able to:
Prevent RADIUS users from logging in via login (or ftp).
Require them to log in via login (or ftp)
Require them to login to a specific network access server (NAS); Control access by time of day.
Provides very granular control over the types of logins allowed, on a per-user basis.
The time-out interval for failing over from an unresponsive primary RADIUS server to a backup RADIUS server is site-configurable.
RADIUS gives System Administrator more flexibility in managing which users can login from which hosts or devices.
Stratus Technology Product Brief
http://www.stratus.com/products/vos/openvos/radius.htm


Reference:

KRUTZ, Ronald L. & VINES, Russel D., The CISSP Prep Guide: Mastering the Ten Domains of Computer Security, 2001, John Wiley & Sons, Pages 43, 44.
Also check: MILLER, Lawrence & GREGORY, Peter, CISSP for Dummies, 2002, Wiley Publishing, Inc., pages 45-46.



Which of the following protects a password from eavesdroppers and supports the encryption of communication?

  1. Challenge Handshake Authentication Protocol (CHAP)
  2. Challenge Handshake Identification Protocol (CHIP)
  3. Challenge Handshake Encryption Protocol (CHEP)
  4. Challenge Handshake Substitution Protocol (CHSP)

Answer(s): A

Explanation:

CHAP: A protocol that uses a three way hanbdshake The server sends the client a challenge which includes a random value(a nonce) to thwart replay attacks. The client responds with the MD5 hash of the nonce and the password.
The authentication is successful if the client's response is the one that the server expected.


Reference:

Page 450, OIG 2007.
CHAP protects the password from eavesdroppers and supports the encryption of communication.


KRUTZ, Ronald L. & VINES, Russel D., The CISSP Prep Guide: Mastering the Ten Domains of Computer Security, 2001, John Wiley & Sons, Page 44.



The Terminal Access Controller Access Control System (TACACS) employs which of the following?

  1. a user ID and static password for network access
  2. a user ID and dynamic password for network access
  3. a user ID and symmetric password for network access
  4. a user ID and asymmetric password for network access

Answer(s): A

Explanation:

For networked applications, the Terminal Access Controller Access Control System (TACACS) employs a user ID and a static password for network access.


Reference:

KRUTZ, Ronald L. & VINES, Russel D., The CISSP Prep Guide: Mastering the Ten Domains of Computer Security, 2001, John Wiley & Sons, Page 44.



Which of the following is most relevant to determining the maximum effective cost of access control?

  1. the value of information that is protected
  2. management's perceptions regarding data importance
  3. budget planning related to base versus incremental spending.
  4. the cost to replace lost data

Answer(s): A

Explanation:

The cost of access control must be commensurate with the value of the information that is being protected.


Reference:

KRUTZ, Ronald L. & VINES, Russel D., The CISSP Prep Guide: Mastering the Ten Domains of Computer Security, 2001, John Wiley & Sons, Page 49.






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