An IS auditor performing a telecommunication access control
review should be concerned PRIMARILY with the:
A. maintenance of access logs of usage of various system
resources.
B. authorization and authentication of the user prior to
granting access to system resources.
C. adequate protection of stored data on servers by
encryption or other means.
D. accountability system and the ability to identify any
terminal accessing system resources.
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Answer / guest
Answer: B
The authorization and authentication of users is the most
significant aspect in a telecommunications access control
review as it is a preventive control. Weak controls at this
level can affect all other aspects. The maintenance of
access logs of usage of system resources is a detective
control. The adequate protection of data being transmitted
to and from servers by encryption or other means is a method
of protecting information during transmission and is not an
access issue. The accountability system and the ability to
identify any terminal accessing system resources deal with
controlling access through the identification of a terminal.
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Answer / antoine
B. authorization and authentication of the user prior to
granting access to system resources.
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An Internet-based attack using password sniffing can: A. enable one party to act as if they are another party. B. cause modification to the contents of certain transactions. C. be used to gain access to systems containing proprietary information. D. result in major problems with billing systems and transaction processing agreements.
Which of the following disaster recovery/continuity plan components provides the GREATEST assurance of recovery after a disaster? A. The alternate facility will be available until the original information processing facility is restored. B. User management was involved in the identification of critical systems and their associated critical recovery times. C. Copies of the plan are kept at the homes of key decision making personnel. D. Feedback to management assuring them that the business continuity plans are indeed workable and that the procedures are current.
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The MOST effective method of preventing unauthorized use of data files is: A. automated file entry. B. tape librarian. C. access control software. D. locked library.
Which of the following encrypt/decrypt steps provides the GREATEST assurance in achieving confidentiality, message integrity and nonrepudiation by either sender or recipient? A. The recipient uses his/her private key to decrypt the secret key. B. The encrypted pre-hash code and the message are encrypted using a secret key. C. The encrypted pre-hash code is derived mathematically from the message to be sent. D. The recipient uses the sender's public key, verified with a certificate authority, to decrypt the pre-hash code.
An IS auditor discovers evidence of fraud perpetrated with a manager's user id. The manager had written the password, allocated by the system administrator, inside his/her desk drawer. The IS auditor should conclude that the: A. manager's assistant perpetrated the fraud. B. perpetrator cannot be established beyond doubt. C. fraud must have been perpetrated by the manager. D. system administrator perpetrated the fraud.
Which of the following types of data validation editing checks is used to determine if a field contains data, and not zeros or blanks? A. Check digit B. Existence check C. Completeness check D. Reasonableness check
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A control that detects transmission errors by appending calculated bits onto the end of each segment of data is known as a: A. reasonableness check. B. parity check. C. redundancy check. D. check digits.
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Where adequate segregation of duties between operations and programming are not achievable, the IS auditor should look for: A. compensating controls. B. administrative controls. C. corrective controls. D. access controls.
In a system that records all receivables for a company, the receivables are posted on a daily basis. Which of the following would ensure that receivables balances are unaltered between postings? A. Range checks B. Record counts C. Sequence checking D. Run-to-run control totals