Questions:

1) On the DublinRouter we could add a default route based on the network above.This route could be used to route all traffic to the ISP that matches any and all IP packet destinations as a last resort.  Give an example of what this default route could be? Write your answer here.

IOS allows the configuration of a static default route by using special values for the subnet and mask fields in the ip route command: 0.0.0.0 0.0.0.0.

We shoud use the address of the interface s0/1/0 of the ISP:
ip route 0.0.0.0 0.0.0.0 200.1.1.2

Could be also neccesary to indicate: default-information originate (in the rip protocolo version 2). It tells the router if the IPv4 routing table has a default route in it, advertise a default route with RIP. 



2) What summary route could you use to route back traffic from the ISP to the DublinRouter sites? Write your answer here. Note any assumptions/observations you make  based onyour  summary route. 

We could configure 2 statics address (one for each network connected to DublinRouter):
ip route 192.167.1.0   255.255.255.0   200.1.1.1
ip route 192.168.2.128 255.255.255.128 200.1.1.1

We can also use a summary route like this:
ip route 192.168.0.0 255.255.128.0  200.1.1.1
