Figure 12.21 displays a network of hubs, switches, and gateways. When answering the questions, keep in mind the protocol layers provided by these devices. Also, keep in mind how a NAT gateway handles private and global addresses.
a. Assuming that we only have MAC addresses for hosts A through D, which can reach which? Fill the answers into a reachability matrix formatted as shown in Table 11.2; put a check mark if the host can reach the destination.
b. Assuming that we have IP addresses for hosts A through D, which can send an unsolicited packet to which? Fill the answers into a reachability matrix.
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