A network administrator needs to connect two routers in a point-to-point configuration and conserve IP space. Which of the following subnets should the administrator use?

The correct answer is D. /30. Using a /30 subnet mask is the most efficient way to conserve IP space for a point-to-point connection between two routers. A /30 subnet provides four IP addresses, two of which can be assigned to the router interfaces, one for the network address, and one for the broadcast…

Submitted by andres_qro· Mar 6, 2026Network implementation

Question

Options

A724
B/26
C/28
D/30

How the community answered

(47 responses)

A
9% (4)
B
17% (8)
C
4% (2)
D
70% (33)

Explanation

Using a /30 subnet mask is the most efficient way to conserve IP space for a point-to-point connection between two routers. A /30 subnet provides four IP addresses, two of which can be assigned to the router interfaces, one for the network address, and one for the broadcast address. This makes it ideal for point-to-point links where only two usable IP addresses are

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