Two-Way Trust - Two-Way trusts are the collection of establishing two One-Way trusts where both domains trust one another. Users from both domains can have access in both domains.
Trusting - A trusting domain accepts the authentication (or rejection) of user accounts from the domain controllers of another domain. This process is accomplished through Pass-Through Authentication (see below), and it is transparent to the user. Typically, resources are located in the trusting domains.
Trusted - This is the domain whose users will have access to both domains. A trusted domain can validate its users even though they are physically logging into within another domain. Under almost every senario, user accounts will reside in the trusted domain.
