B: A domain consists of one or more WebLogic Server instances (and their associated resources) that

you manage with a single Administration Server.

D: In a domain, server instances other than the Administration Server are referred to as Managed

Servers. Managed Servers host the components and associated resources that constitute your

applications.

Incorrect:

Not A: Each WebLogic Server domain must have one server instance that acts as the Administration

Server.

Not C: A domain can include multiple WebLogic Server clusters and non-clustered WebLogic Server

instances.

Not E: A Node Manager process is not associated with a specific WebLogic domain but with a

machine. You can use the same Node Manager process to control server instances in

any WebLogic Server domain, as long as the server instances reside on the same

machine as the Node Manager process. Node Manager must run on each computer

that hosts WebLogic Server instances—whether Administration Server or Managed

Server—that you want to control with Node Manager.

Reference: Overview of WebLogic Server Domains