CCNA: Cisco Certified Network Associate — Question 1304

An application in the network is being scaled up from 300 servers to 600. Each server requires 3 network connections to support production, backup, and management traffic. Each connection resides on a different subnet. The router configuration for the production network must be configured first using a subnet in the 10.0.0.0/8 network. Which command must be configured on the interface of the router to accommodate the requirements and limit wasted IP address space?

Answer options

• A. ip address 10.10.10.1 255.255.254.0
• B. ip address 10.10.10.1 255.255.252.0
• C. ip address 10.10.10.1 255.255.240.0
• D. ip address 10.10.10.1 255.255.255.240

Correct answer: B

Explanation

The correct answer is B, which uses a subnet mask of 255.255.252.0, allowing for 1022 usable IP addresses, accommodating the requirement for 600 servers with 3 connections each. Option A provides fewer usable addresses than required, C offers too large a subnet, and D supports only 14 IPs, which is insufficient for the server needs.