A network administrator is adding a new LAN to a branch office. The new LAN must support 200 connected devices. What is the smallest network mask that the network administrator can use for the new network?
IT Exam Items Repository › Category: CCNA 1 v7 › A network administrator is adding a new LAN to a branch office. The new LAN must support 200 connected devices. What is the smallest network mask that the network administrator can use for the new network?
A network administrator is adding a new LAN to a branch office. The new LAN must support 200 connected devices. What is the smallest network mask that the network administrator can use for the new network?
- 255.255.255.240
- 255.255.255.0
- 255.255.255.248
- 255.255.255.224
Explanation: To support 200 connected devices, the network administrator must choose a mask that provides at least 200 usable host addresses based on the formula 2n−2. A mask with 7 host bits (27−2=126) is insufficient, so 8 host bits are required (28−2=254). A 32-bit IPv4 address with 8 host bits leaves 24 bits for the network portion (/24), which corresponds to the subnet mask 255.255.255.0.
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