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 C
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 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
Change IP so IPs are not conflicting.
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.
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.
is it C or D ?
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.