Last Updated on November 15, 2023 by InfraExam
A network administrator is adding a new LAN to a branch office. The new LAN must support 10 connected devices. What is the smallest network mask that the network administrator can use for the new network?
|Explanation & Hint:
To determine the smallest network mask that can support 10 connected devices, we need to consider the number of host bits required in the subnet mask to accommodate at least 10 devices. In IP addressing, the number of usable host addresses in a subnet can be calculated using the formula:
Number of usable hosts=2^n−2
Where is the number of host bits. The subtraction of 2 accounts for the network address and the broadcast address, which cannot be assigned to hosts.
Let’s calculate the minimum number of host bits required to support at least 10 devices:
Therefore, the smallest network mask that the network administrator can use to support 10 devices is 255.255.255.240 (/28), which provides up to 14 usable IP addresses.