MCQ
Paper - II (xiv) — Network Security MCQ - Practice Questions with Answers
Solve 44 Paper - II (xiv) — Network Security questions for RAS/RPSC preparation.
Practice questions
Q1Which statement correctly distinguishes a group from a field in finite algebra used in cryptography?
For exam-level finite algebra, a group is organized around one operation satisfying closure, associativity, identity, and inverse. A field supports two operations, with addition forming an abelian group and every non-zero element having a multiplicative inverse.
Q2In an ethical hacking assignment for a college LAN, which action is the clearest example of authorized vulnerability assessment?
Ethical hacking is distinguished from attack activity by prior permission, a defined scope and controlled reporting. On a LAN or WAN, even technically simple scanning becomes improper if it targets systems outside the authorization boundary.
Q3In the context of ethical hacking, which activity best matches authorized penetration testing?
Authorized penetration testing uses attacker-like techniques to evaluate whether security controls can be bypassed, but it is bounded by written scope, permission, and reporting duties. The authorization separates ethical testing from illegal compromise.
Q4For a prime number p and an integer a not divisible by p, Fermat's little theorem states which congruence?
Fermat's little theorem says that if p is prime and a is not a multiple of p, then a raised to p-1 leaves remainder 1 modulo p. This result underlies simple primality checks and modular-exponentiation reasoning.
Q5Which mechanism provides message authentication by combining a cryptographic hash function with a secret key?
HMAC uses a cryptographic hash function together with a shared secret key to produce a message authentication code. A receiver with the same key can recompute the value to check both integrity and origin authenticity between the parties.
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More questions
6In modular arithmetic, which structure is formed by the set of residue classes modulo a prime number p under addition and multiplication modulo p?
7If p is prime and a is not divisible by p, which congruence is given by Fermat's little theorem?
8Which protocol is specifically associated with securing e-mail by using signed or encrypted MIME content?
9Which security service is primarily concerned with preventing unauthorised disclosure of information?
10A LAN differs from a WAN mainly because a LAN normally covers:
11Which statement about the Miller-Rabin primality test is most accurate for basic cryptography use?
12Which option correctly identifies a WAN in comparison with a LAN?
13In the set Z7 = {0,1,2,3,4,5,6} with addition and multiplication modulo 7, why is Z7 a field?
14In the finite set {0, 1, 2, 3, 4} with addition and multiplication modulo 5, why is every non-zero element guaranteed to have a multiplicative inverse?
15Which situation is a common email-security risk involving malicious code?