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.
(Excerpts from The Internet Peering Playbook: Connecting to the Core of the Internet) In each Internet Peering Ecosystem the Tier 1 ISP is at the top of the pyramid. Definition: A Tier 1 ISP is an ISP that has access to the entire Internet Region routing table only through its settlement-free peering relationships.