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Microsoft Certified: Azure Solutions Architect Expert · Microsoft
Interactive Drag & Drop Matching
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Hotspot Solution:
Just so you know, the formula to apply, which you can search also on Wikipedia is 2^n - 2. n = 32 - 16 (for example) = 16 2^16 - 2 = 65536 - 2 = 65534 However, besides the broadcast address and the id address of the subnet (e.g. 172.16.0.0), Azure uses 3 additional IPs for itself, hence we have to subtract 5. So the formula becomes: n = 32 - 16 (for example) = 16 2^16 - 5 = 65536 - 5 = 65531 This helps you to calculate it during the exam rather than learning it by heart as the numbers could change any time but the formula and the reserved ips stay the same.
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Given answer is correct and so easy to spot it the answer without knowing much about subnetting and here is why Make sure the PRIVATE IPs for on-prem and Azure DO NOT OVERLAP and hence from given options you can eliminate 172.16.xx Also the VPN GWY needs be of /27 minimum preferably /26 or 25 CIDR
Subnet1: 192.168.0.0/24 Gateway subnet: 192.168.1.0/27
Just so you know, the formula to apply, which you can search also on Wikipedia is 2^n - 2. n = 32 - 16 (for example) = 16 2^16 - 2 = 65536 - 2 = 65534 However, besides the broadcast address and the id address of the subnet (e.g. 172.16.0.0), Azure uses 3 additional IPs for itself, hence we have to subtract 5. So the formula becomes: n = 32 - 16 (for example) = 16 2^16 - 5 = 65536 - 5 = 65531 This helps you to calculate it during the exam rather than learning it by heart as the numbers could change any time but the formula and the reserved ips stay the same.