Explanation/Reference:
Explanation:
A recovery time objective (RTO) is based on the acceptable downtime in case of a disruption of operations.
The lower the RTO, the higher the cost of recovery strategies. The lower the disaster tolerance, the narrower the interruption windows, and the lesser the permissive data loss.

Explanation/Reference:
Explanation:
Because of the configuration and the way IDS technology operates, the main problem in operating IDSs is the recognition (detection) of events that are not really security incidents- false positives, the equivalent of a false alarm. An IS auditor needs to be aware of this and should check for implementation of related controls, such as IDS tuning, and incident handling procedures, such as the screening process to know if an event is a security incident or a false positive. Trap messages are generated by the Simple Network Management Protocol (SNMP) agents when an important event happens, but are not particularly related to security or IDSs.
Reject-error rate is related to biometric technology and is not related to IDSs. Denial-of-service is a type of attack and is not a problem in the operation of IDSs.

Explanation/Reference:
Explanation:
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 (known as vertical redundancy check) also 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 to the sending device for comparison with the original transmission.