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To help mitigate the effects of a denial of service attack,
which mechanism can an Internet service provider (ISP) use
to identify Internet protocol (IP) packets from unauthorized
sources?
A. Inbound traffic filtering
B. Rate limiting
C. Reverse address lookup
D. Network performance monitoring
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Answer: A
ISPs serve user organizations with pre-assigned IP
addresses. Inbound traffic filtering can filter out IP
packets that do not conform to the pre-assigned IP address
range. Rate limiting involves limiting the occurrences of
certain types of TCP/IP packets according to predefined
specifications. It is used to identify excess packets.
Reverse address lookup determines if the source address is
an IP packet of the true address of the computer (host) that
is actually sending the packet. It would identify address
substitution, but would not initially identify that it was
an unauthorized source. Network performance monitoring is a
way to monitor system performance for potential intrusions
on a real-time basis. It could help identify unusual traffic
volumes.
| Is This Answer Correct ? | 3 Yes | 0 No |
Which of the following BEST describes the objectives of following a standard system development methodology? A. To ensure that appropriate staffing is assigned and to provide a method of controlling costs and schedules B. To provide a method of controlling costs and schedules and to ensure communication among users, IS auditors, management and IS personnel C. To provide a method of controlling costs and schedules and an effective means of auditing project development D. To ensure communication among users, IS auditors, management and personnel and to ensure that appropriate staffing is assigned
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An organization is considering connecting a critical PC-based system to the Internet. Which of the following would provide the BEST protection against hacking? A. An application-level gateway B. A remote access server C. A proxy server D. Port scanning
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