CCENT/CCNA ICND1 100-101 Official Cert Guide

Practice Problem 4

Table I-8 Practice Problem 4: First Two Steps

For Problem 4, at Step 3, the shortest mask is /28, so the initial mask will be one smaller, or /27. Finding the correct answer requires only two passes through calculating a new subnet ID and mask, with the final answer shown in Table I-9.

Table I-9 Practice Problem 4: Multiple Passes Through Step 4 (Correct Answer Highlighted)

The best summary route will use subnet ID 192.168.2.128, mask /26.