During a network design review, it is recommended that the network with a single large area
should be broken up into a backbone and multiple nonbackbone areas. There are differing
opinions on how many ABRs are needed for each area for redundancy. What would be the
impact of having additional ABRs per area?

In a large enterprise network with multiple data centers and thousands of access devices, OSPF
is becoming unstable due to link flapping. The current design has the access devices
multihomed to large aggregation routers at each of the data centers. How would you redesign
the network to improve stability?

What are two benefits of following a structured hierarchical and modular design? (Choose
two.)

Refer to the exhibit.In this network design, where should summarization occur to provide the best summarization
and optimal paths during a single-failure incident as well as during normal operation?

When you design a network, when would it be required to leak routes into a Level 1 area?

Which three techniques can be used to improve fault isolation in an enterprise network design?
(Choose three.)

What are three key design principles when using a classic hierarchical network model? (Choose
three.)

Refer to the exhibit.In this design, which technology would provide for the best use of resources to provide end-toend Layer 2 connectivity?

What are two design advantages to using virtual port channel? (Choose two.)

A customer is using a service provider to provide a WAN backbone for a 30-site network. In
establishing the network, the customer must work within these constraints:
 The customer has a self-managed MPLS backbone.
 The VPLS WAN backbone of the service provider does not support
PIM snooping.
 Multicast VPN must be used for multicast support inside some
VRFs.
What can the customer do so that multicast traffic is NOT flooded to all sites?