Area ID: Both routers must belong to the same OSPF area for a neighbor relationship to form.
MTU of the Uplink: Mismatched MTU settings can prevent the OSPF adjacency from forming, as OSPF packets may be dropped if they exceed the MTU size.
Subnet mask: Both routers must have the same subnet mask on the interface where OSPF is configured to establish a neighbor relationship.

Virtual Tunnel Interfaces (VTI) are used in route-based VPNs. In this type of VPN, the tunnel is treated like a regular interface on the router. This allows for the configuration of routing protocols and the application of routing decisions to the traffic flowing through the VPN tunnel. VTIs simplify the management of routing and make it more flexible in VPN scenarios.

master: The master role in NSX Manager is responsible for managing and coordinating the other NSX Manager nodes in the cluster.
policy: The policy role handles the policy-driven API and configuration, allowing administrators to define and manage network and security policies.
controller: The controller role in NSX Manager manages control plane functions and handles routing, switching, and other network state information required for NSX operations.

Tags are metadata that can be applied to physical servers, virtual machines, logical ports, and logical segments in NSX. Tags can be used for dynamic security group membership, which allows for granular and flexible enforcement of security policies based on various criteria. In the scenario, the company is deploying NSX micro-segmentation to secure a simple application composed of web, app, and database tiers.

Explanation:
Security policy recommendations: Are East-West distributed firewall (DFW) security policies in the application category12.
Security group recommendations: Are VMs or physical servers whose traffic flows were analyzed for the time period and the boundary you had specified12.
Service recommendations: Are service objects that were used by applications in the VMs or physical servers that you had specified, but the services are not yet defined in the NSX inventory12.
https://docs.vmware.com/en/VMware-NSX-Intelligence/4.1/user-guide/GUID-BA3B0D67-4AA8-439E- A845-4598DAD6B9D0.html