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Question # 1



Which queuing structure is used on SD-WAN Edge routers?

A.

FIFO

B.

LLQ+WFQ

C.

1P-4Q-2T

D.

Priority




D.   

Priority



Explanation:
https://www.cisco.com/c/en/us/td/docs/routers/sdwan/configuration/qos/vEdge-20-x/qosbook/
forwarding-qos.html
On Cisco vEdge devices and Cisco IOS XE SD-WAN devices, each interface has eight
queues, which are numbered 0 to 7. Queue 0 is reserved, and is used for both control
traffic and low-latency queuing (LLQ) traffic. For LLQ, any class that is mapped to queue 0
must also be configured to use LLQ. Queues 1 to 7 are available for data traffic, and the
default scheduling for these seven queues is weighted round-robin (WRR). For these
queues, you can define the weighting according to the needs of your network. When QoS
is not configured for data traffic, queue 2 is the default queue.




Question # 2



Which two functions is the Cisco SD-Access Edge Node responsible for? (Choose two.)

A.

Act as anycast layer 3 gateway

B.

Advertise EID subnets

C.

Map users to virtual network

D.

Act as LISP proxy tunnel router

E.

Route and transport IP traffic




A.   

Act as anycast layer 3 gateway




C.   

Map users to virtual network






Question # 3



Refer to the exhibit.

An architect is designing a network for a customer supporting a Wake-on-LAN application.
Which solution must the architect choose?

 

A.

IP directed-broadcasts on R1

B.

spanning-tree uplinkfast on SW1

C.

spanning-tree uplinkfast on SW2

D.

IP directed-broadcasts on R2




D.   

IP directed-broadcasts on R2



Explanation: "IP directed broadcast" must be supported on the last router to the
destination subnet. Since the sleeping PC's dont have IP adresses, the machines must be
calles awake by broadcast that behaves like an unicast untill they reach the destination
network. There the directed broadcast is handled like a proper broadcast to wake all WOL
machines.
https://www.cisco.com/c/en/us/support/docs/switches/catalyst-3750-series-switches/91672-
catl3-wol-vlans.html




Question # 4



Refer to the exhibit. An architect is developing a solution to consolidate networks while
retaining device redundancy. The routing protocol for the WAN routers must be open
standard, ensure high availability, and provide the fastest convergence time. Which
solution must the design include?

A.

both routers running EIGRP

B.

one router running OSPFv2 and other OSPF v3

C.

one router running ISIS and other OSPF v3

D.

both routers running OSPFv2




A.   

both routers running EIGRP



Explanation: EIGRP has a function called "EIGRP Ipv6" (But that can still be called
"EIGRP")




Question # 5



An engineer is designing a network for a customer running a wireless network with a
common VLAN for all APs. The customer is experiencing unicast flooding in the Layer 2
network between the aggregation and access layers. The customer wants to reduce the
flooding and improve convergence time. Which solution meets these requirements?

A.

Migrate all APs to a common Layer 2 access layer switch and run Layer 3 from the
aggregation layer to all remaining access layer switches.

B.

Align HSRP primary and STP root bridges and reduce ARP timers to match CAM timers
on the aggregation layer switches.

C.

Migrate to a Layer 3 access campus design if the APs can run on separate VLANs.

D.

Align HSRP primary and STP root bridges if the APs cannot run on separate VLANs.




D.   

Align HSRP primary and STP root bridges if the APs cannot run on separate VLANs.






Question # 6



Exhibit:

Refer to the exhibit. An engineer is designing a Layer 2 campus network. The design must
support fast convergence and leverage as much bandwidth as possible between layers.
Distribution switches do support VSS; unfortunately, not all routing protocols are available
for use due to license limitations. Which solution must the engineer choose?

A.

EtherChannel

B.

MEC

C.

RSTP

D.

ECMP




B.   

MEC






Question # 7



An engineer must peer with an ISP for internet connectivity using BGP, initially, the
engineer wants to receive only specific prefixes from the ISP and a default route. However,
the solution must provide the flexibility to add prefixes in the future at short notice. The ISP
has a two-week change process in place. Which route filtering solution must the engineer
employ?

A.

Request a limited internet routing table and a default route from the ISP and configure
the BGP max-limit to 1 with an access list that permits only the specific internet prefixes
and blocked networks

B.

Request only the required prefixes and default route be advertised from the ISO with
whitelisted networks

C.

Request a full internet routing table and a default route from the ISP and configure
inbound route filtering with a prefix list that permits the default route and required prefixes

D.

Configure outbound route filtering on the enterprise and ISP so that the enterprise tell
the ISP which prefixes are required




C.   

Request a full internet routing table and a default route from the ISP and configure
inbound route filtering with a prefix list that permits the default route and required prefixes



Explanation: anychange on the prefix list, engineer only need to update the preifx list and
restart the BGP peer to the ISP. soft-reconfiguration inbound could be used to reduce down
time of reset BGP peer, but it require lots of memory and in this case, connection to ISP
and tons of route learnt will not be apporitated.




Question # 8



Drag and drop the steps WAN Edge performs when on-boarded into the Cisco SD-WAN
overlay from the left into the order they are completed on the right.




Question # 9



Since installing a cisco TelePresence system, the company is experiencing other
application having response issues when the system in use. As a result, the company
asked an architect to recommend a QoS solution. The customer is currently using a
CBWFQ policy to manage traffic on an internet connection with a speed of 100 Mbps.
Which link-capacity limit must the architect choose for strict-priority for the real-time traffic?

A.

25 Mbps

B.

50 Mbps

C.

33 Mbps

D.

75 Mbps




C.   

33 Mbps



Explanation: https://www.cisco.com/c/en/us/td/docs/iosxml/
ios/qos_conmgt/configuration/xe-3s/qos-conmgt-xe-3s-book/qos-conmgtoview.
html#GUID-48F6AF58-5CCC-44A0-B868-
125AE453FF2A---(75-Mbps)
The sum of all bandwidth allocation on an interface cannot exceed 75 percent of the total
available interface bandwidth. The remaining 25 percent is used for other overhead,
including Layer 2 overhead, routing traffic, and best-effort traffic. Bandwidth for the CBWFQ
class-default class, for instance, is taken from the remaining 25 percent.




Question # 10



Drag and drop the model-driven telemetry considerations from the left onto the modes they
apply to on the right.



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Designing Cisco Enterprise Networks (ENSLD) Exam Dumps


Exam Code: 300-420
Exam Name: Designing Cisco Enterprise Networks (ENSLD)

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