Chap 8

What are the objectives described in the text?

• Discuss the benefits of dynamic routing protocols

• Explain the physical setup of a router

• Describe the various route types found in the routing table structure

• Explain the history of routing protocols

What is the purpose of the hierarchical structure of the Cisco IP routing table?

• To limit the number of routing entries

• To speed up the lookup process

• To confuse network administrators

• To slow down the lookup process

In the routing table structure, what type of routes are Level 1 routes?

• Routes with a variable subnet mask

• Routes with a subnet mask less than the classful mask

• Routes with a subnet mask equal to the classful mask

• Routes with a subnet mask greater than the classful mask

What is the significance of a parent route in the routing table structure?

• Does not contain any next-hop IP address or exit interface information

• Contains the next-hop IP address or exit interface information

• Is used as a default route for all packets

• Is a level 2 route with a longer subnet mask

What happens if there is no match with any level 2 child routes of the parent in the routing table lookup process?

• Packet is forwarded based on the default route

• Router searches for the next-hop IP address

• Packet is dropped

• Router determines if the routing behavior is classless or classful

What command indicates that classful routing behavior is in effect?

• ip routing

• no ip classless

• no shutdown

• ip classless

Why is it recommended to use classless routing behavior?

• To increase the number of child routes

• To improve network security

• To limit the use of supernet and default routes

• To simplify the routing table lookup process

What is the purpose of the ip classless command?

• To restrict the use of dynamic routing protocols

• To allow the router to search beyond child routes for a lesser match

• To disable routing table lookup

• To enable classful routing behavior

What is the outcome if there is no match with any child routes in a classless routing behavior scenario?

• Packet is forwarded based on the default route

• Router drops the packet

• Router sends an ICMP message back to the source

• Router switches to classful routing behavior

What is the primary difference between classful and classless routing behaviors?

• The type of routing protocols supported

• The use of supernet and default routes

• The speed of the routing table lookup process

• The number of routing entries allowed