Exercises

10.1	In Figure 10.9 which of the routes came to `gateway` from the router `kpno?`
10.2	Assume a router has 30 routes to advertise using RIP, requiring one datagram with 25 routes and another with the remaining 5. What happens if once an hour the first datagram with 25 routes is lost?
10.3	The OSPF packet format has a checksum field, but the RIP packet does not. Why?
10.4	What effect does load balancing, as done by OSPF, have on a transport layer?
10.5	Read RFC 1058 for additional details on the implementation of RIP. In Figure 10.8 each router advertises only the routes that it provides, and none of the other routes that it learned about through the other router's broadcasts on the 140.252.1 network. What is this technique called?
10.6	In Section 3.4 we said there are more than 100 hosts on the 140.252.1 subnet in addition to the eight routers we show in Figure 10.7. What do these 100 hosts do with the eight broadcasts that arrive every 30 seconds (Figure 10.8)?