-Difference between bridge and a router -How to select a root bridge? -How to setup a network with multiple paths between segments using bridge and routers? -Binding and filetering: endpoint-independent, address [and port] dependent -Why use MASQUERADE vs SNAT? -Suppose there are two network segments A and B connected by a router C. A DHCP server DA runs in segment A. How to setup a DHCP relay in segment B? -What is CNAME, SOA, RR, .arpa domain? -resolve a DNS query with or without caching -SNMP trap, OID, snmpget, snmpwalk, snmpbulk -MAC addresses corresponding to multicast IP addresses? -Compare and contrast PIM-DM vs. PIM SM. Under what circumstances each is useful? -Suppose there is no DHCP and IP addresses are not configured. How would you design a protocol so that two machines with wireless interfaces somehow choose am IP address automatically?