Final answer:
When setting up a VPN server, the configurations needed on the second network adapter include: D) Static IP address and E) Subnet mask.So option D and option E is applicable.
Step-by-step explanation:
When configuring a VPN server, the second network adapter requires specific settings:
D) Static IP address: Ensures the adapter has a fixed, unchanging IP crucial for consistent VPN connectivity.
E) Subnet mask: Defines the network size and separates the host part from the network part, essential for proper communication.
Option A (DNS server) and option B (Gateway) might be configured but aren't exclusive to the second adapter.
DNS settings resolve domain names, while the gateway directs traffic between networks and typically exists on the primary network adapter.
Option C (DHCP server) isn't typically added to the second adapter as it assigns IP addresses dynamically, while for a server, a static IP is preferred for consistent access.
The DHCP server role is often managed separately on the network to allocate IP addresses to clients dynamically.
So option D and option E is applicable.