What is the default IP range of CIN network (with no increment)?

Question

Options

• A192.168.1.0
• B198.51.100.0
• CThe same as Management network
• D192.0.2.0

• A
  3% (1)
• B
  93% (28)
• D
  3% (1)

Explanation

Option B (198.51.100.0) is correct because 198.51.100.0 is the designated default IP range for the CIN (Converged Infrastructure Network) when no increment is applied - it is a reserved documentation/test range (RFC 5737 TEST-NET-2) that vendors like Cisco use as a defined default for this specific network segment.

Option A (192.168.1.0) is wrong because that is a generic private Class C address commonly used for home/LAN networks - it has no special relationship to the CIN network role. Option C is wrong because CIN and the Management network serve distinct purposes and are intentionally assigned different IP ranges to avoid overlap and maintain separation of concerns. Option D (192.0.2.0) is a plausible-looking trap - it is RFC 5737 TEST-NET-1, a close neighbor to the correct answer, but it is the default for a different network segment, not CIN.

Memory tip: The three RFC 5737 documentation ranges go in order - 192.0.2.0, 198.51.100.0, 203.0.113.0. Think of CIN as the middle child (198.51.100.0) sitting between its two siblings.

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