Problem 5 Consider the network in Figure 1. Suppose that host A just connected to the network and has an empty ARP table. Suppose that the ARP tables at other hosts are up to date R1 R2 IP1 MAC1 MAC7 IP4 MAC4 IP6 MACO IP2 MAC2 IP3 MAC3 IP5 MAC5 IP8 MAC8 Figure 1. lllustration of Problem 5 a) How many subnets are there in this network? List the interfaces in each subnet (by their IP b) Suppose A is a mobile host (e.g., laptop). How does A obtain its IP address? How does it obtain c) Suppose B is a server whose hostname is known to A. A wants to send a packet to B. How does A d) In the packet sent by A destined to B, what are the values of these header fields: MAC src, MAC e) How does A know the IP address of the left interface of R1 (i.e., IP3)? How does A know the MAC f) Repeat d) for the packet sent by R1 (i.e., the frame containing the A-to-B IP datagram that is address and MAC address) its MAC address? know B' IP address? dest, IP src, IP dest? address of this interface (i.e., MAC3)? sent by R1]) Problem 5 Consider the network in Figure 1. Suppose that host A just connected to the network and has an empty ARP table. Suppose that the ARP tables at other hosts are up to date R1 R2 IP1 MAC1 MAC7 IP4 MAC4 IP6 MACO IP2 MAC2 IP3 MAC3 IP5 MAC5 IP8 MAC8 Figure 1. lllustration of Problem 5 a) How many subnets are there in this network? List the interfaces in each subnet (by their IP b) Suppose A is a mobile host (e.g., laptop). How does A obtain its IP address? How does it obtain c) Suppose B is a server whose hostname is known to A. A wants to send a packet to B. How does A d) In the packet sent by A destined to B, what are the values of these header fields: MAC src, MAC e) How does A know the IP address of the left interface of R1 (i.e., IP3)? How does A know the MAC f) Repeat d) for the packet sent by R1 (i.e., the frame containing the A-to-B IP datagram that is address and MAC address) its MAC address? know B' IP address? dest, IP src, IP dest? address of this interface (i.e., MAC3)? sent by R1])