Hop-By-Hop vs. End-to-End Layers HostA communicates with Host d Host c Hosta Host D Router 1 Router 2 马 router 3 Router 5 Host b Router 6 Router 7 Hoste Router 4Hop-By-Hop vs. End-to-End Layers Host B Router 4 Host E Router 3 Router 5 Router 6 Router 7 HostAcommunicates with Host D Host C HostA Router 1 23 Host D Router 2