What must the administrator configure for the local quick mode selector for site B in an IPsec VPN?

In the context of configuring a local quick mode selector for site B in an IPsec VPN, the importance of defining the correct network address is crucial for proper communication between the connected sites.

Selecting the network 192.168.2.0/24 as the local quick mode selector implies that this is the range of IP addresses that will be used for data traffic in the VPN tunnel for site B. In an IPsec VPN configuration, the quick mode selectors are used to determine which local and remote subnets can communicate over the secure tunnel. This allows the FortiGate to recognize which traffic should be encrypted and sent through the VPN connection.

The other options represent different subnets that may not align with the actual configuration or intended use for site B, leading to potential issues in connectivity or routing. For example, if site B correctly utilizes the 192.168.2.0/24 network and is misconfigured to another subnet, it would not be able to send or receive traffic securely through the VPN, thereby undermining the VPN's purpose. This highlights the critical nature of choosing the correct local quick mode selector to ensure successful IPsec VPN operation.