punctuation - Use of "e.g." — are parentheses necessary?

Is it appropriate to use "e.g." in a sentence without using parentheses?

1. This administrative access control should provide visibility into access via multiple vectors (e.g. group access rights versus individual account rights).


2. This administrative access control should provide visibility into access via multiple vectors e.g. group access rights versus individual account rights.

Answer

It is certainly appropriate to use "e.g." in a sentence without deploying parentheses. In your Example 2, I would place a comma before "e.g.". Parenthesizing examples is purely the prerogative of the author, usually serving as a means of indicating the perceived importance of the examples to the thought being expressed.