Routing Protocols and Firewalls

Question 1

What are the three ways a router can learn routes for the routing table?

Answer 1

1) Directly connected networks - an interface configure with an IP on that network

2) Static routes - manually configured

3) Dynamic routing protocols - Learned from other networks e.g. BGP, OSPF

Question 2

Which command can you use to see how a router is adding routes to it’s table and forming neighbor relationships?

Answer 2

Debug ip routing

Question 3

What are the three zones typically used by zone based firewalls?

Answer 3

INSIDE - Inside network
OUTSIDE - e.g. INTERNET
DMZ - e.g. Public facing servers on our network

Question 4

What is meant by a “stateful” firewall?

Answer 4

Traffic that originates inside the network is generally allowed out, and reply traffic is generally allowed back (as long as it doesn’t violate a firewall policy).