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Homework 4: End-to-End Data Plane Forwardin Given the network topology at the end of this document, answer the following questions. a) Suppose an application on host A is sending a UDP packet to an application on host B. The application is bound to port 10000 on host A and port 20000 on host B. Fill in the source and destination addresses used at each layer of the protocol stack when the packet leaves Host A Source Destination UDP Header: Port IP Header: IP Address Ethernet Header MAC address b) Suppose an application on host A is sending a UDP Packet to an application on Server 1. The application is bound to port 10000 on host A and port 30000 on Server 1. Fill in the source and destination addresses used at each layer of the protocol stack at every L3 hop along the way Hop 1 UDP Header Source Port Dest Port Hop 2 UDP Header Source Port Dest Port Hop 3 UDP Header Source Port Dest Port IP Header Source IP: Dest IP: IP Header Source IP: Dest IP: IP Header Source IP: Dest IP: Ethernet Header Source MAC Dst MAC Ethernet Header Source MAC Dst MAC Ethernet Header Source MAC Dst MA c) In hop 1, how does host A learn the addresses needed at each layer prior to sending the packet? The answer may be one or more of manual or static host configuration, dynamically learned via some protocol (in which case state the protocol), dynamically Hop 1 UDP Header Source Port Dest Port Hop 2 UDP Header Source Port Dest Port Hop 3 UDP Header Source Port Dest Port IP Header Source IP: Dest IP: IP Header Source IP: Dest IP: P Header Source IP: Dest IP: Ethernet Header Source MAC Dst MAC Ethernet Header Source MAC Dst MAC Ethernet Header Source MAC Dst MAC Server 1 128.235.10.1/24 RR-RR-RR-22-22-22 128.235.250.2/30 Host A RR-RR-RR-21-21-21 28.235.10.10/24 Router 1 Router 2 0.10.10.2/24 AA-AA-AA-33-33-33 128.235.250.1/30 Host B RR-RR-RR-12-12-12 Server 2 28.235.12.12/24 22-22-22-22-22-22 0.10.10.1/24 10.10.10.3/24 88-88-88-22-22-22 28.235.12.1/24 RR-RR-RR-23-23-23