Your on-premises network has an IP address range of 10.0.0.0/23.
You have an Azure virtual network named VNet1 that contains a virtual machine named VM1.
VNet1 has an IP address range of 10.0.1.0/24.
You need to deploy a Site-to-Site (S2S) VPN to connect the on-premises network to VNet1.
What should you do first?
To establish a Site-to-Site (S2S) VPN, it's critical to ensure that the IP address ranges of the on-premises network and the Azure virtual network do not overlap. Given that the on-premises network has an IP address range of 10.0.0.0/23 and VNet1 currently has an IP address range of 10.0.1.0/24, changing VNet1 to use 10.0.2.0/24 will avoid overlap and allow a successful VPN connection.
Answer is B because of the overlapping of address. On-prem has the range of 10.0.0.0 - 10.0.127.255 Azure VNet1 has the range of 10.0.1.0 - 10.0.1.255 Azure Extended Network can work with overlapping address ranges
Since your on-premises network has an IP address range of 10.0.0.0/23 and VNet1 currently has an IP address range of 10.0.1.0/24, which overlaps with the on-premises network, you need to change the IP address range of VNet1 to ensure that it does not overlap with the on-premises network. Therefore, the correct option is: C. Configure VNet1 to use the IP address range of 10.0.2.0/24.
Answer C
C. Configure VNet1 to use the IP address range of 10.0.2.0/24. This step ensures that there are no overlapping IP ranges between the on-premises network and the Azure virtual network, which is essential for a successful S2S VPN connection.
is it C or D ?
there is an overlap in the ranges 10.0.0.0/23 and 10.0.1.0/24 as the 10.0.1.0/24 range is entirely contained within the 10.0.0.0/23 range.
This has overlapping IP ranges, but there is no requirement to maintain the same IP addresses for both on-premises and Azure host VMs, so it's C for me, as it's a separate range. IF you had to maintain the IPs, then the extended network would win here.
Change IP so IPs are not conflicting.