N-tier diagrams provide logical rather than physical views. ... performing load balancing; N2, the Web servers; N3, common services such as LDAP directories and credit card processing; N4, content services; and N5, back-end databases.
|Title||:||Security Controls for Sarbanes-Oxley Section 404 IT Compliance|
|Author||:||Dennis C. Brewer|
|Publisher||:||John Wiley & Sons - 2005-10-10|