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Cisco 300-420 Exam Questions


Vendor Name: Cisco
Certification Name:CCNP Enterprise
Exam Name:Designing Cisco Enterprise Networks (ENSLD)

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Cisco 300-420 Exam Questions


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300-420 Exam Sample Questions:



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

 

FIFO

 

LLQ+WFQ

 

1P-4Q-2T

 

Priority


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.




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

 

Act as anycast layer 3 gateway

 

Advertise EID subnets

 

Map users to virtual network

 

Act as LISP proxy tunnel router

 

Route and transport IP traffic


Act as anycast layer 3 gateway


Map users to virtual network





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?

 

 

IP directed-broadcasts on R1

 

spanning-tree uplinkfast on SW1

 

spanning-tree uplinkfast on SW2

 

IP directed-broadcasts on R2


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




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?

 

both routers running EIGRP

 

one router running OSPFv2 and other OSPF v3

 

one router running ISIS and other OSPF v3

 

both routers running OSPFv2


both routers running EIGRP


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




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?

 

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.

 

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

 

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

 

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


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



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