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How to find network ID from IP address? without using network calc?

Answer:

U CAN FIND NETWORK ID BY 1ST OCTET OF IP ADDRESS IN IPV.4
CLASS A RANGE START FROM 0-127,
CLASS B 128-192
CLASS C 192-223
CLASS D USED FOR MULTICAST
CLASS E USED FOR EDUCATION AND RESEARCH
AND 127.0.0.1 IS USED FOR LOOP BACK ADDRESS

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The success of control self-assessment (CSA) depends highly
on:

A. Having line managers assume a portion of the responsibility for control monitoring.
B. Assigning staff managers the responsibility for building,
but not monitoring, controls.
C. The implementation of stringent control policy and rule-driven controls.
D. The implementation of supervision and the monitoring of
control assigned duties?

eparation of duties between computer opeartors and other
data processing personnel is intended to:
A. Prevent unauthorized modifications to program or data.
B. Reduce overall cost of operations
C. Allow operators to concentrate on their assigned duties
D. Restrict operator access to data?