A planned EBGP network will use OSPF to reach the EBGP peer addresses. Which of these conditions should
be avoided in the design that could otherwise cause the peers to flap continuously?
A. An ACL blocks TCP port 179 in one direction.
B. IP addresses used to peer are also being sent via EBGP.
C. The OSPF area used for peering is nonbackbone (not area 0).
D. The routers are peered by using a default route sent by OSPF.

Your design plan includes mutual redistribution of two OSPF networks at multiple locations, with connectivity
to all locations in both networks. How is this accomplished without creating routing loops?
A. Use route maps on the ASBRs to allow only internal routes to be redistributed.
B. Use route maps on the ASBRs to allow internal and external routes to be redistributed.
C. Use route maps on the ASBRs to set tags for redistributed routes.
D. Use route maps on the ASBRs to filter routes with tags so they are not redistributed.

You are a network designer and are responsible for ensuring that the network you design is secure. How do
you plan to prevent infected devices on your network from sourcing random DDoS attacks using forged source
addresses?
A. ACL-based forwarding
B. ACL filtering by destination
C. Unicast RPF loose mode
D. Unicast RPF strict mode

Refer to the exhibit.
23

You are developing a migration plan to enable IPv6 in your IPv4 network. Starting at R3 and assumingdefault
IS-IS operations, what is likely to happen when you enable IPv6 routing on the link from R3 to R2?
A. Only R3 and R2 have IPv4 and IPv6 reachability.
B. R2 receives an IPv6 default route from R3.
C. Loopback reachability between all routers for IPv4 is lost.
D. All routers except R2 are reachable through IPv4.
E. R3 advertises the link from R3-R2 to R1, R4 and R5 only.

Refer to the exhibit.

In this BGP design, what is the next hop for 10.1.1.0/24 on R8 and R7?
A. The next hop for 10.1.1.0/24 on R7 is R8 and the next hop for R8 is R7.
B. The next hop for 10.1.1.0/24 on R7 is R5 and the next hop for R8 is R6.
C. The next hop for 10.1.1.0/24 on R7 is R6 and the next hop for R8 is R5.
D. The next hop for 10.1.1.0/24 on R7 is R3 and the next hop for R8 is R4.

Refer to the exhibit.

This diagram depicts the design of a small network that will run EIGRP on R1 and R2, and EIGRP Stub on
R3. In which two ways will this network be impacted if there is link instability between R1 and R2? (Choose
two.)
A. R1 will have routes in its routing table that originate from R2 and R3.
B. R3 will have routes in its routing table that originate from R1 and R2.
C. R2 will have routes in its routing table that originate from R1 and R3.
D. R3 will be transit for traffic between R1 and R2.
E. R3 will not be transit for traffic between R1 and R2.

You are designing a network to support data, voice and video. Which two main factors will you address to
improve network convergence? (Choose two.)
A. event propagation delay
B. failure detection delay
C. forwarding engine update delay
D. routing table recalculation delay

You are hired to design a solution that will improve network availability for users on a campus network with
routed access. If the budget limits you to three components, which three components would you recommend
in your design proposal? (Choose three.)
A. redundant power supplies in the access routers
B. standby route processors for SSO in the core routers
C. standby route processors for SSO in the distribution routers
D. standby route processors for SSO in the access routers
E. replace copper links between devices with fiber links

20

You are evaluating convergence characteristics of various interior gateway protocols for a new network
design. Which technology allows link-state routing protocols to calculate paths to destination prefixes that are
functionally similar to feasible successors in Enhanced Interior Gateway Routing Protocol?
A. Incremental Shortest Path First
B. Cisco Multiprotocol Label Switching Traffic Engineering Fast Reroute
C. Loop-Free Alternate Fast Reroute
D. partial route calculation
E. Fast-Flooding

In which two ways is a network design improved by the inclusion of IP Event Dampening? (Choose two.)
A. reduces processing load
B. provides sub-second convergence
C. improves network stability
D. prevents routing loops
E. quickly detects network failures