Nothing will happen to routing table entries if the gated daemon dies. Initially, this is not a problem, as routes probably will not change that quickly. If a change does occur, e.g., a router dies, updates will not occur, making the kernel routing table out of date.
A2:
RIP version 2 supports variable length subnet addresses, where version 1 doesn't.
A3:
Default time for RIP to remove a dead route is 3 minutes (180000 milliseconds ). To adjust this time, we can use the ndd command to adjust the kernel parameter ip_ire_gw_probe_interval .
A4:
This configuration will not work because the ospf statement is missing a closing semicolon. The file should look like this:
OSPF utilizes a link-state database that maps all the available links in a network and the metrics associated with each link; OSPF is an interior gateway protocol. For the entire Internet, this would constitute an enormous amount of information. This is a primary reason why OSPF is not used to interconnect the Internet. Another reason is that when a router joins an OSPF Area, an election protocol is used to select the Designated Router responsible for maintaining the link-state database. The dynamic nature of the Internet would mean OSPF would have to perform a significant number of elections whenever a router dies or joins the network. This, as well as having the concept of a single Designated and Backup Designate Router, makes OSPF a poor choice as a routing protocol to interconnect the entire Internet.
