1-1. In Figure 1-28, when Host A transmits a packet to Host B, how many physical links, data links, and routes will there be along the way? How many packets and frames? How many switches and routers? (Hint: The answers are in the figure, but work it out yourself.)

1-2. Repeat for Host C sending a packet to Host E.

Switched Network X Frame X Packet Switch X3 Host A Data Link A-R1 Host C Physical Link (A-X1) Switch X4 Switched Network Y Switch X1 Router R1 Switch X2 Route A-B Route A-B 3 Networks (X,Y,Z) 1 Packet & Route 3 Frames & Data Links 7 Physical Links Data Link R1-R2 Packet Frame Y Switched Network Z Host B Switch Z1 Router R2 Packet Frame z Switch 22 Data Link R2-B Switch 23 Router R3 Host D Switch 24 Host E