ITPEC FE Morning April 2023 Question 33

Source exam: ITPEC FE Morning April 2023Topic: Networks

ITPEC FE Morning April 2023 — Question 33 of 80

Subnet Host Count — calculate usable hosts from CIDR notation.

Given network 192.168.10.0/26:

  • •Prefix length = 26 → 32 - 26 = 6 bits for hosts
  • •Total addresses = 2⁶ = 64
  • •Usable hosts = 64 - 2 = 62 (subtract network + broadcast)

Why not others:
- (a) 30 — corresponds to /27 (5 host bits)
- (c) 126 — corresponds to /25 (7 host bits)
- (d) 254 — corresponds to /24 (8 host bits)

Key rule: Usable hosts = 2^(32 - prefix) - 2. Always subtract 2 for network address and broadcast address.

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