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Cisco Certified Design Expert Practical Exam Question and Answers

Cisco Certified Design Expert Practical Exam

Last Update May 5, 2024
Total Questions : 249

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Questions 1

You are designing a traffic monitoring and analysis system for a customer. Which traffic monitoring technique would you recommend to place the amount of burden on the network infrastructure?

Options:

A.  

SPAN monitor ports

B.  

passive taps

C.  

IP NBAR

D.  

NetFlow

Discussion 0
Questions 2

The service provider that you work for wants to offer IPv6 internet service to its customers without upgrading all of its access equipment to support IPv6, which transition technology do you recommend?

Options:

A.  

NAT64

B.  

CGN

C.  

Dual-stack CPE

D.  

6RD

Discussion 0
Questions 3

An enterprise customer has a national WAN network based on DMVPN over the Internet, with sites located throughout the country. The customer has recently deployed VoIP throughout the entire network , and users report that it takes up to 2 seconds to establish a telephone call to an IP telephone at another office network. Drag and drop the root cause and the corresponding design solution from the left onto the correct targets on the right Not all options are used

Options:

Discussion 0
Questions 4

Your client is considering acquiring a new IPv6 address block so that all Ethernet interfaces on the network receive addresses based on their burned-in hardware addresses, with support for 600 VLANs. Which action do you recommend?

Options:

A.  

Acquire a new /60 IPv6 network and subnet it into /70 networks, one per VLAN

B.  

Acquire a new /58 IPv6 network and subnet it into /64 networks, one per VLAN

C.  

Acquire a new /60 Ipv6 network and subnet it into /68 networks, one per VLAN

D.  

Acquire a new/54 IPv6 network and subnet it into /64 networks , one per VLAN

Discussion 0
Questions 5

Which two techniques are used in an OSPF network design to slow down the distribution of topology information caused by a rapidly flapping link? (Choose two)

Options:

A.  

LSA throttling

B.  

SPF throttling

C.  

IP event dampening

D.  

Link-state incremental SPF

E.  

Link-state partial SPF

Discussion 0
Questions 6

Which option describes a design benefit of root guard?

Options:

A.  

It prevents switch loops caused by unidirectional point-to-point link condition on Rapid PVST+ and MST.

B.  

It prevents switch loops by detecting on one-way communications on the physical port.

C.  

It allows small, unmanaged switches to be plugged into ports of access switches without the risk of switch loops.

D.  

It makes the port go immediately into the forwarding state after being connected.

E.  

It prevents switched traffic from traversing suboptimal paths on the network.

F.  

It does not generate a spanning-tree topology change upon connecting and disconnecting a station on a port.

Discussion 0
Questions 7

Refer to the exhibit.

Which routing solution is the most scalable to connect the branches to the HQ and to connect the branches together over the internet using DMVPN?

Options:

A.  

EIGRP

B.  

EIGRP with the branch routers setup as stubs

C.  

OSPF with each branch router as an ABR

D.  

IS-IS L2 in all locations

E.  

OSPF Area 0 in all locations

Discussion 0
Questions 8

Which OSPF design consideration, with regards to simplicity and address preservation, must be considered when connecting two Layer 3 switches directly using 10 GBASE-T cabling and formatting an OSPF neighbor adjacency?

Options:

A.  

Mesh groups must be included in the design

B.  

The OSPF Hello and Dead timers must be tuned to detect failures as quickly as possible

C.  

The OSPF network type must be set to point-to-multipoint

D.  

An OSPF neighbor adjacency formed over loopback interfaces must be placed in Area 0

E.  

The OSPF network type must be set to point-to-point

Discussion 0
Questions 9

In a routed access hierarchical campus design, the access-to-distribution Layer 2 uplink trunks are replaced with Layer 3 point-to-point routed links. Why is it recommended that VLANs are confined on a single access switch rather than span across multiple access switches?

Options:

A.  

to allow for better convergence time

B.  

to prevent the occurrence of Layer 2 loops

C.  

to allow for fault isolation

D.  

to prevent routing black holes

Discussion 0
Questions 10

A BGP route reflector in the network is talking longer than expected to converge during network changes. Troubleshooting has shown that the router cannot handle all the TCP acknowledgements during route updates. Which action can be performed to tune device performance?

Options:

A.  

Increase the size of the large buffers

B.  

Decrease the size of the small buffers

C.  

Increase the keepalive timers for each BGP neighbor

D.  

Increase the size of the hold queue

Discussion 0
Questions 11

In a VPLS design solution, which situation indicates that BGP must be used instead of LDP in the control plane?

Options:

A.  

MAC address learning scales better through BGP

B.  

BGP supports VPLS interworking

C.  

Pseudowire configuration overhead is reduced

D.  

There are no full-mesh pseudowire due to the route reflection feature of BGP

Discussion 0
Questions 12

Drag and drop the Fast ReRoute mechanisms on the left to the correct routing protocols on the right. Not all options are used.

Options:

Discussion 0
Questions 13

Which two statements regarding to QoS marking are true? (Choose two)

Options:

A.  

Shaping is one of the ways that packets can be remarked

B.  

Class-based marking occurs after packet classification

C.  

802.1Q/p CoS bits and IP Precedence are both layer 3 marking fields

D.  

QoS marking establishes a trust boundary that scheduling tools depend on

E.  

MPLS EXP and DSCP are both layer 2 marking fields

Discussion 0
Questions 14

Which are two open-source SDN controllers? (Choose two)

Options:

A.  

Big Cloud Fabric

B.  

OpenContrail

C.  

Application Policy Infrastructure Controller

D.  

Virtual Application Networks SDN controller

E.  

OpenDaylight

Discussion 0
Questions 15

A very large enterprise customer is migrating from EIGRP to IS-IS .What is your main concern in regards to change in the path packets take after the migration is complete?

Options:

A.  

The areas sizes.

B.  

The number of prefixes

C.  

The redistribution points.

D.  

The bandwidth and metrics of the links.

Discussion 0
Questions 16

Which two IoT use cases require the low latency and high reliability that 5G networks provide?

Options:

A.  

Smart Home

B.  

Automotive

C.  

Health and Wellness

D.  

Smart Cities

E.  

Sports and Fitness

Discussion 0
Questions 17

A network engineering team is in the process of designing a lab network for a customer demonstration. The design engineer wants to show that the resiliency of the MPLS traffic Engineering Fast Reroute solution has the same failover/failback times as a traditional SONET/SDH network (around 50MSEC). In order to address both link failure and node failure within the lab typology network, which type of the MPLS TE tunnels must be considered for this demonstration?

Options:

A.  

TE backup tunnel

B.  

Next-hop (NHop) tunnel

C.  

FRR Backup tunnel

D.  

next-next-hop (NNHop) tunnel

Discussion 0
Questions 18

An enterprise network has two core routers that connect to 200 distribution routers and uses full-mesh iBGP peering between these routers as its routing method. The distribution routers are experiencing high CPU utilization due to the BGP process. Which design solution is the most effective?

Options:

A.  

Increase the memory on the distribution routers

B.  

Increase the memory on the core routers

C.  

Implement route reflectors on the two core routers

D.  

Increase bandwidth between the core routers

E.  

Implement eBGP between the core and distribution routers

Discussion 0
Questions 19

A data center deign requires monitoring of their business critical voice and video services accessed by remote locations. Which two items are applicable? (Choose two)

Options:

A.  

If multiple applications share the same DSCP or CoS values, NBAR can be utilized

B.  

The applications being monitored must be assigned a unique CoS value

C.  

If multiple applications share the same the same DSCP or CoS values, IPFIX can be utilized

D.  

The applications being monitored must be assigned a unique QoS profile

E.  

The applications being monitored must be assigned unique DSCP values

F.  

The reporting data must be assigned to a QoS profile to ensure accurate statistics

Discussion 0
Questions 20

Refer to the exhibit.

An enterprise has three sites over a Layer 2 Metro Ethernet ELAN service. 100Mb/s and 10 Mb/s links have been provisioned to provide redundancy for the head office. When OSPF routing enabled to provide connectivity and the correct bandwidth statement has been applied to each interface, the branch sites observe two equal-cost routes to the head office. The enterprise wants to send all traffic through the 100 Mb/s link and use the 10Mb/S link strictly as a backup. Which OSPF network type must be set to ensure that the head office 100 Mb/s circuit is preferred over the 10 Mb/s circuit, at the same time minimize the amount of configuration required on all of the routers throughout the network?

Options:

A.  

NBMA

B.  

Point-to-multipoint

C.  

Point-to-point

D.  

Broadcast

Discussion 0
Questions 21

What is an implication of using route reflectors in an iBGP topology?

Options:

A.  

Route reflection limits the total number of iBGP routers.

B.  

Route reflection causes traffic to flow in a hub-and-spoke fashion.

C.  

The manipulation of BGP attributes is not supported on the other routers than the route reflectors.

D.  

Route reflectors can create routing loops when more than one router reflector is used in the same cluster.

E.  

Multipath information is difficult to propagate in a route reflector topology.

Discussion 0
Questions 22

Refer to the exhibit.

Company ACME is adding a Cisco TelePresence system for real-time collaboration and wants to ensure the highest user experience. Drag and drop the necessary QoS mechanisms from the left to the right in any order. Not all options will be used.

Options:

Discussion 0
Questions 23

You are designing a new data center network. Drag and drop new data center requirements on the left into the appropriate design principle on the right.

Options:

Discussion 0
Questions 24

Which two options must be part of your network design to support dynamic mutual redistribution between multiple OSPFv2 and IS-IS boundaries, to avoid suboptimal routing? (Choose two)

Options:

A.  

Matching OSPF external routes

B.  

Route aggregation

C.  

Route tagging

D.  

Route filtering

E.  

Disabling IS-IS wide metrics

Discussion 0
Questions 25

At which two networks points is route summarization supported? (Choose two)

Options:

A.  

At EIGRP AS boundaries

B.  

At EIGRP interface boundaries

C.  

At OSPF virtual-link boundaries

D.  

At EIGRP are boundaries

E.  

At OSPF area boundaries

F.  

At EIGRP stub interface boundaries

Discussion 0
Questions 26

There is an MPLS-enabled link constantly flapping on an MPLS VPN network. Given that the network runs OSPF as the IGP protocol, which design mechanism will stabilize the network and avoid constant re-convergence?

Options:

A.  

IP Event Dampening

B.  

OSPF fast hellos

C.  

IP SLA

D.  

Partial SPF

Discussion 0
Questions 27

Refer to the exhibit.

This Layer 2 ring has 10 VLANs with 1000 MAC addresses in each VLAN. Which protocol or mechanism provides the shortest traffic outage if the link marked with “X” fails?

Options:

A.  

Ethernet linear protection switching

B.  

PVRST

C.  

MST

D.  

Ethernet ring protection switching

Discussion 0
Questions 28

An network is designed to use OSPF to reach eBGP peers. Which condition should be avoided in the design to potentially prevent the eBGP peers do not flap continuously in case of link failure?

Options:

A.  

Disable BGP synchronization.

B.  

Advertise IP addresses used on eBGP peer statement via a non-backbone OSPF area.

C.  

Advertise via eBGP IP addresses used on eBGP peer statements.

D.  

Use an ACL to block BGP in one direction.

Discussion 0
Questions 29

Which two are IoT sensor-specific constraints? (Choose two)

Options:

A.  

Memory

B.  

Processing power

C.  

The amount of devices

D.  

Cooling

E.  

Standard transport protocols

Discussion 0
Questions 30

Options:

Discussion 0
Questions 31

Which two options are Loop-Free Alternate design considerations? (Choose two)

Options:

A.  

MPLS TE must be enabled because it is used for building the backup paths

B.  

Backup coverage and effectiveness is dependent on the network topology

C.  

It can simplify the capacity planning by matching the backup path with the post-convergence path

D.  

It provides an optional backup path by avoiding low bandwidth and edge links

E.  

It can impact SLA-sensitive appliance by routing traffic to low bandwidth links while IGP convergence is in progress

Discussion 0
Questions 32

You are designing dual-homed active/active ISP connections from an enterprise customer for internet services, and you have recommended BGP between the customer and ISP. When three security mechanisms do you enable to secure the connection? (Choose three)

Options:

A.  

uRPF is strict mode

B.  

remote triggered black holes

C.  

IDS

D.  

GTSM

E.  

Routing protocol authentication

F.  

uRPF in loose mode

Discussion 0
Questions 33

You are redesigning a high-speed transit network due to congestion-related issues. Which congestion avoidance mechanism can you apply to the existing network?

Options:

A.  

NBAR

B.  

FIFO

C.  

WRED

D.  

Rate-limit

E.  

Policy-Based Routing

Discussion 0
Questions 34

Refer to the exhibit.

Each branch network must connect to the HQ and other branch networks over the phase 2 DMVPN network using a single tunnel interface. OSPF is running over the DMVPN network. Which network type is compatible with the DMVPN tunnel and ensures that the next hop of any route is unchanged?

Options:

A.  

Point-to-point

B.  

Point-to-multipoint

C.  

Broadcast

D.  

Nonbroadcast

Discussion 0
Questions 35

You have been asked to design a wireless network solution that will implement context-aware services on an existing network that was initially deployed for data traffic only. Which two design principles would you follow to increase the location accuracy with the least possible impact on the current setup? (Choose two.)

Options:

A.  

Use directional antennas to provide better cell separation.

B.  

Add access points along the perimeter of the coverage area.

C.  

Install additional APs in monitor mode where the co-channel interference would otherwise be affected.

D.  

Increase the AP density to create an average inter-access point distance of less than 40 ft.| 12.2meters

E.  

Fine tune the access point’s radio configuration to have a higher average transmission power to achieve better coverage.

Discussion 0
Questions 36

What are three common objectives of customers using multiple cloud providers? (Choose three )

Options:

A.  

regional cloud provider access

B.  

security

C.  

analytics

D.  

high availability

E.  

feature disparity

F.  

bandwidth

Discussion 0
Questions 37

Refer to the exhibit.

ACME Mining has four data centers in Santiago, Cape Town, Mumbai, and Beijing. They are full-mesh connected via a 400 Mb/s EVP-LAN. A 1-TB transfer occurs daily via FTP between the Santiago and Mumbai data centers. When testing, the data transfer took an ''unexpected and outrageous, with an average transfer rate of 47 KB/s. The team provided this information.

LAN bandwidth usage below 5% at both data centers during transfer.

WAN bandwidth usage was between 20-30% at both data centers during transfer.

The only QoS on WAN is KB/s strict priority configured for other types of traffic.

There is no QoS on LAN.

The ping RTT average between data centers is 378 milliseconds.

Which action improves the file transfer rate?

Options:

A.  

Use SFTP instead of FTP

B.  

Apply optimization techniques at both data centers.

C.  

Use TFTP instead of FTP.

D.  

Classify FTP transfer and use the strict priority queue on the WAN.

Discussion 0