We grow up with a strong sense of the physical boundary that contains us.

Contiguous properties are encircled with a congregation's physical boundary.

Most violations occur due to the absence of a physical boundary and lack of navigational tools for small fishermen.

The absence of a physical boundary and lack of proper demarcation leaves small fishing boats and trawlers susceptible to illegally crossing territorial waters.

A router constitutes the logical or physical boundary between the subnets.