200-301 · Question #1010
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
The correct answer is B. ip address 10.10.10.1 255.255.252.0. To accommodate 600 servers on a production subnet with minimal IP address waste, a subnet mask of 255.255.252.0 (a /22 prefix) should be used.
Question
Options
- Aip address 10.10.10.1 255.255.254.0
- Bip address 10.10.10.1 255.255.252.0
- Cip address 10.10.10.1 255.255.240.0
- Dip address 10.10.10.1 255.255.255.240
How the community answered
(27 responses)- A11% (3)
- B63% (17)
- C4% (1)
- D22% (6)
Why each option
To accommodate 600 servers on a production subnet with minimal IP address waste, a subnet mask of 255.255.252.0 (a /22 prefix) should be used.
A /23 subnet (255.255.254.0) provides 510 usable host addresses, which is insufficient for 600 servers.
For 600 servers plus the router interface, approximately 601 IP addresses are needed; a /22 subnet (255.255.252.0) provides 1022 usable host addresses, which comfortably accommodates the requirement while minimizing wasted IP space.
A /20 subnet (255.255.240.0) provides 4094 usable host addresses, which is far more than needed and wastes significant IP address space.
A /28 subnet (255.255.255.240) provides 14 usable host addresses, which is far too few for 600 servers.
Concept tested: Subnetting calculations and IP address planning
Source: https://www.cisco.com/c/en/us/support/docs/ip/routing-information-protocol-rip/13788-3.html
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