QUESTIONS FOR READERS Figure 2.8 shows some of the concepts discussed in this chapter and can be used to help you answer the following questions. Client Client Client ClientServer Server VLAN 1 Broadcast messages sent only to the VLAN 1 broadcast domain (and router). Broadcast messages sent only to the VLAN 2 broadcast domain (and router). VLAN 2 Server Router Transparent Bridge Hub Hub ARP on LAN segement before sending frame Use UDP for connectionless, TCP for connection-oriented LAN Switch Hub FIGURE 2.8 Hubs, bridges, and routers can connect LAN segments to form an internetwork. 1. What is the main function of the ARP message on a LAN? 2. What is the difference between TCP and UDP terms of connection overhead and reliability? 3. What is a transparent bridge? 4. What is the difference between a bridge and a router in terms of broadcast domains? 5. What is the relationship between a broadcast domain and a VLAN? 69 . of Ethereal on the servers). However, LANs are not the only type of connections used on the Illustrated Network. Displaying SONET Links What about link types other than Ethernet? ISPs in the. connect the nodes of the Illustrated Network. We’ll investigate the frame types used in various technolo- gies and how they carry packets. We’ll take a long look at Ethernet, and mention many other. but the output is still informative. The fi rst column shows cumulative values and the second column shows the change since the last monitor “snapshot” on the link. “Live” traffi c during these