Which of the following statements about the single-node network is CORRECT?

Question

Options

• AAnalog phones/ fax machines, IP phones, and SoftPhone terminals can directly access unified
• BThe unified gateway can connect to the PSTN through a trunk.
• CIt is recommended that the single-node network be deployed in a large enterprise with many
• DThe primary node does not support a two-node cluster.

• A
  13% (3)
• B
  79% (19)
• C
  4% (1)
• D
  4% (1)

Explanation

Option B is correct because a unified gateway is specifically designed to bridge enterprise unified communications systems with the Public Switched Telephone Network (PSTN), and it does so via a trunk connection (such as a SIP trunk or ISDN PRI). This is a core architectural function of any unified gateway.

Why the distractors are wrong:

• A is incorrect because analog phones and fax machines cannot directly access the unified communications system - they require a gateway or analog adapter to convert their signals first. Only IP phones and SoftPhones connect directly.
• C is incorrect because single-node networks are designed for small to medium deployments, not large enterprises with high user counts. Large enterprises require multi-node architectures for scalability and redundancy.
• D is incorrect because the primary node does support a two-node cluster - that's exactly what a two-node cluster means: a primary node paired with a secondary/backup node.

Memory tip: Think of the unified gateway as a "translator at the border" - it speaks both the enterprise's digital language and the PSTN's language, connecting them via a trunk. Single-node = small office; trunk = PSTN bridge. If an answer says a single-node is for large networks or that analog phones connect directly, it's a red flag.

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