view or configure routing table
When you use the route command to view or configure the routing table the output is shown with these columns: Destination~Gateway~Genmask~Flags~ Metric~Ref~Use~Iface. There is supposed to be the possibility of nine one-letter flag values.
U lets you know that the route is up
G lets you know that the route is a gateway
H lets you know that the route refers to a host
D shows that this route is dynamically created
M shows this route is set if the table entry was modified by
an ICMP redirect message
! shows the route is a reject route and datagrams will be dropped
This is the information I have found thus far. What are the other three possibilities? What do they stand for?