It sounds like you are looking for a network. If a node can not find a network to connect to, then it cannot connect.
<span>Landforms that could be created at convergent boundaries would consist of: volcanoes, mountains, trenches, volcanic islands, and even deserts could result from effects of converging boundaries. The landforms are mountains.</span>
A composite primary key applies to more than one field. <span>A table can have only one primary key, which may consist of single or multiple fields.</span>
A composite primary key is selected from Design view. <span>In Design </span>view<span>, you can use the </span>Primary Key<span> button to assign or remove the </span>primary key<span> designation for the </span>selected<span> field or fields.</span>