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Cisco Certified Design Expert (CCDE v3.1)

Architecting Enterprise Ecosystems: Why Strategic Design Principles Defeat Static Memory Dumps

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Question # 141

A large enterprise customer is planning a new WAN connection to its headquarters The current architecture is dual homed with static routing but users complain when a specific link fails Failure of the other link does not affect any services or applications The new WAN connection must provide the headquarters with a resilient network design and increase the return on investment Which solution should be recommended to the customer?

A.

Implement granular quality of service on the links.

B.

Procure additional bandwidth.

C.

Use dynamic routing toward the WAN.

D.

Add an additional link to the WAN.

Question # 142

Which action must be taken before new VoIP systems are implemented on a network to ensure that the network is ready to handle the traffic?

A.

Evaluate bandwidth utilization and connection quality

B.

Enable special requirements such as direct DID lines on pickup

C.

Make recommendations to limit the size of the half-open session table on routers

D.

Check if anomaly detection is enabled for SIP and H.323 on Layer 3 devices

Question # 143

Refer to the exhibit.

This network is running OSPF and EIGRP as the routing protocols. Mutual redistribution of the routing protocols has been configured on the appropriate ASBRs. The OSPF network must be designed so that flapping routes in EIGRP domains do not affect the SPF runs within OSPF. The design solution must not affect the way EIGRP routes are propagated into the EIGRP domains. Which technique accomplishes the requirement?

A.

route summarization at the ASBR interfaces facing the OSPF domain

B.

route summarization on the appropriate ASBRs

C.

route summarization on the appropriate ABRs

D.

route summarization on EIGRP routers connecting toward the ASBR

Question # 144

Which two statements describe the functionality of OSPF packet-pacing timers? (Choose two.)

A.

The group-pacing timer controls the interval that is used for group and individual LSA refreshment

B.

OSPF flood-pacing timers allow dynamic control of the OSPF transmission queue size

C.

OSPF retransmission-pacing timers allow control of interpacket spacing between consecutive link-state update packets in the OSPF retransmission queue

D.

OSPF retransmission-pacing timers allow control of packet interleaving between nonconsecutive link-state update packets in the OSPF retransmission queue

E.

OSPF flood-pacing timers allow control of interpacket spacing between consecutive link-state update packets in the OSPF transmission queue

Question # 145

Refer to the exhibit.

For Company XYZ, Bangkok is using ECMP to reach the 172.20.2.0/24 network. The company wants a design that would allow them to forward traffic from 172.16.2.0/24 toward 172.20.2.0/24 via the Singapore router as the preferred route. The rest of the traffic should continue to use ECMP. Which technology fulfills this design requirement?

A.

policy-based routing

B.

route summarization

C.

unequal-cost load balancing using variance

D.

LFA

Question # 146

Company XYZ is designing their network using the three-layer hierarchical model. At which layer must the QoS design classify or mark the traffic?

A.

Access

B.

Core

C.

Collapsed core

D.

Distribution

Question # 147

A network design includes a long signaling delay in notifying the Layer 3 control plane that an interface has failed. Which two of these actions would reduce that delay? (Choose two.)

A.

Increase network stability.

B.

Reduce the time for the network to reconverge.

C.

Increase the notification of interface flaps.

D.

Enable lower data link layer recovery systems to have an opportunity to restore the interface.

Question # 148

A network uses an SDN architecture with switches and a centralized controller What should be on the switches but not on the controller?

A.

control plane functions

B.

data plane functions

C.

northbound interface

D.

a southbound interface

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