The diagrams under the section titled “Traffic path from Host 2 to host 1” has incorrect interface and switch labels that causes confusion. For instance, the first diagram in this section shows SW2 with two interfaces to connected hosts labeled Fa0/1 and Fa0/3. Now, this switch may in fact have these interfaces but I am assuming that we are trying to stay in strict accordance with the network diagram shown at the beginning of this lesson (four hosts, two switches, separate and distinct interface labels). The subsequent diagrams are similarly incorrectly labeled as you progress through this section.
Brad