Ex1

Kernel IP routing table
Destination	Gateway		Genmask		Flags	Metric	Ref	Use	Iface
195.11.14.0	0.0.0.0		255.255.255.0	U	0	0	0	eth0



Ex2

pc1 can reach interfaces eth0 and eth1 of r1 and interface eth1 of r2( names of interfaces as in the figure)
r1 can reach interface eth0 of pc1 and interface eth1 of r2

Ex3

route add -net 195.11.14.0 netmask 255.255.255.0 gw 100.0.0.9 dev eth1

Ex4

route add -net 100.0.0.8 netmask 255.255.255.252 gw 195.11.14.1 dev eth0
route add -net 200.1.1.0 netmask 255.255.255.0 gw 195.11.14.1 dev eth0

Ex5

R1: route add default gw 100.0.0.10
R2: route add default gw 100.0.0.9

Ex6

Kernel IP routing table
Destination	Gateway		Genmask		Flags	Metric	Ref	Use	Iface
192.168.20.192	*		255.255.255.0	U	0	0	0	eth0
default		192.168.20.193	0.0.0.0		UG	0	0	0	eth0