Place the end of the tape measure on the handrail at the point where the inner surface of the support post and handrail meet. Mark your first measurement at the distance from the post indicated by your answer in Step 5. In this example, place a mark 6 inches from the support post.
Definition: A Tier 1 ISP is an ISP that has access to the entire Internet Region solely via its free and reciprocal peering agreements. Definition: An ISP is entity that provides (usually sells) access to the global Internet. Definition: An Internet Region is a portion of the Internet network typically bounded by a country's geographical boundaries.
The multi-tier model is the most common model used in the enterprise today. This design consists primarily of web, application, and database server tiers running on various platforms including blade servers, one rack unit (1RU) servers, and mainframes. Figure 2-1 shows the data center multi-tier model topology.