Which of the following controls will detect MOST effectively
the presence of bursts of errors in network transmissions?
A. Parity check
B. Echo check
C. Block sum check
D. Cyclic redundancy check
- 3 Answers
- 15546 Views
- I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
Answer / guest
Answer: D
The cyclic redundancy check (CRC) can check for a block of
transmitted data. The workstations generate the CRC and
transmit it with the data. The receiving workstation
computes a CRC and compares it to the transmitted CRC. If
both of them are equal, then the block is assumed error
free. In this case (such as in parity error or echo check),
multiple errors can be detected. In general, CRC can detect
all single-bit and bubble-bit errors. Parity check also
(known as vertical redundancy check) involves adding a
bit-known as the parity bit-to each character during
transmission. In this case, where there is a presence of
bursts of errors (i.e., impulsing noise during high
transmission rates), it has a reliability of approximately
50 percent. In higher transmission rates, this limitation is
significant. Echo checks detect line errors by
retransmitting data back to the sending device for
comparison with the original transmission.
| Is This Answer Correct ? | 10 Yes | 1 No |
Answer / desai harshad chandrakantbhai
cyclic redudancy check
because cyclic red.check is most effectively f
| Is This Answer Correct ? | 4 Yes | 0 No |
Answer / chris leong
Buddies, can you spelled defination for each and every type
of the checking above? Thanks.
| Is This Answer Correct ? | 0 Yes | 1 No |
An IS auditor discovers that an organization?s business continuity plan provides for an alternate processing site that will accommodate fifty percent of the primary processing capability. Based on this, which of the following actions should the IS auditor take? A. Do nothing, because generally, less than twenty-five percent of all processing is critical to an organization?s survival and the backup capacity, therefore is adequate. B. Identify applications that could be processed at the alternate site and develop manual procedures to backup other processing. C. Ensure that critical applications have been identified and that the alternate site could process all such applications. D. Recommend that the information processing facility arrange for an alternate processing site with the capacity to handle at least seventy-five percent of normal processing.
Which of the following would be a MAJOR disadvantage of using prototyping as a systems development methodology? A. User expectations of project timescales may be overly optimistic. B. Effective change control and management is impossible to implement. C. User participation in day-to-day project management may be too extensive. D. Users usually are not sufficiently knowledgeable to assist in system development.
Business continuity/disaster recovery is PRIMARILY the responsibility of: A. IS management. B. business unit managers. C. the security administrator. D. the board of directors.
Which of the following are data file controls? A. Internal and external labeling B. Limit check and logical relationship checks C. Total items and hash totals D. Report distribution procedures
Which of the following is a strength of the program evaluation review technique (PERT) over other techniques? PERT: A. considers different scenarios for planning and control projects. B. allows the user to input program and system parameters. C. tests system maintenance processes accurately. D. estimates costs of system projects.
The reason for having controls in an IS environment: A. remains unchanged from a manual environment, but the implemented control features may be different. B. changes from a manual environment, therefore the implemented control features may be different. C. changes from a manual environment, but the implemented control features will be the same. D. remains unchanged from a manual environment and the implemented control features will also be the same.
Which of the following is a substantive audit test? A. Verifying that a management check has been performed regularly B. Observing that user IDs and passwords are required to sign on the computer C. Reviewing reports listing short shipments of goods received D. Reviewing an aged trial balance of accounts receivable
When an organization's network is connected to an external network in an Internet client-server model not under that organization's control, security becomes a concern. In providing adequate security in this environment, which of the following assurance levels is LEAST important? A. Server and client authentication B. Data integrity C. Data recovery D. Data confidentiality
An IS auditor reviewing an outsourcing contract of IT facilities would expect it to define the: A. hardware configuration. B. access control software. C. ownership of intellectual property. D. application development methodology.
To develop a successful business continuity plan, end user involvement is critical during which of the following phases? A. Business recovery strategy B. Detailed plan development C. Business impact analysis D. Testing and maintenance
The editing/validation of data entered at a remote site would be performed MOST effectively at the: A. central processing site after running the application system. B. central processing site during the running of the application system. C. remote processing site after transmission to the central processing site. D. remote processing site prior to transmission of the data to the central processing site.
LANs: A. protect against virus infection. B. protect against improper disclosure of data. C. provide program integrity from unauthorized changes. D. provide central storage for a group of users.
Cisco Certifications 
