What is the purpose of selecting Two-way as the direction of the trust?

Selecting Two-way as the direction of the trust serves the purpose of enabling resource sharing in both domains. When a two-way trust is established between two domains, it allows users in each domain to access resources and services in the other domain, facilitating collaboration and resource utilization across both environments.

In a two-way trust, each domain not only trusts the other to authenticate users but also allows both domains to share resources such as files, applications, and services equally. This is particularly beneficial in environments where organizations need to work together closely or where multiple business units require access to shared resources while maintaining separate domain structures.

Other options involve different trust scenarios or functions. For example, a one-way trust would only allow one domain to trust another, but it does not facilitate reciprocal access to shared resources. Selective authentication and domain-wide authentication also deal with specific permission settings rather than the bi-directional resource sharing that a two-way trust offers. Therefore, the focus on facilitating collaboration through mutual access is the key reason for selecting Two-way as the trust direction.