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NEW QUESTION # 105 
Refer to the exhibit. AS65533 and AS65530 are announcing a partial Internet routing table as well as their IP subnets. An architect must create a design that ensures AS64512 become a transit AS. Which filtering solution must the architect choose?
- A. No Export
- B. Next-hop
- C. No-advertise
- D. Maximum-prefix
Answer: D
NEW QUESTION # 106
An engineer is working for a large cable TV provider that requires multiple sources streaming video on different channels using multicast with no rendezvous point. Which multicast protocol meets these requirements?
- A. BIDIR-PIM
- B. any-source multicast
- C. PIM-SM
- D. PIM-SSM
Answer: D
NEW QUESTION # 107
Refer to the exhibit.
Refer to the exhibit. The distribution switches serve as the layer 3 boundary. HSRP preemption is enabled. When the primary switch comes back after a failure, traffic is initially dropped. Which solution must be implemented to improve the design?
- A. Use the preempt delay feature on the primary HSRP device.
- B. Increase the hello timers on both HSRP devices
- C. Configure a higher mac-refresh interval on both HSRP devices
- D. Use the preempt delay feature on the backup HSRP device
Answer: A
NEW QUESTION # 108
An engineer is designing an IPv4 addressing plan for an enterprise with 1000 branches. Each branch requires a prefix for data and a prefix for voice. Each prefix must accommodate up to 128 hosts, and prefixes must facilitate summarization at aggregation points in the network. The security team requires a simple method for identifying voce prefixes. Which allocation does the engineer recommend from the RFC1918 address space?
- A. /24 prefixes for data from 10.0.0.0/8 and /24 prefixes for voice from the next contiguous /24 prefix per site
- B. /24 prefixes for data from 10.0.0.0/8 and /24 prefixes for voice from 172.16.0.0/12
- C. /24 prefixes for data from 10.0.0.0/15 and /24 prefixes for voice from 172.16.0.0/15
- D. /25 prefixes for data from 10.0.0.0/8 end /25 prefixes for voice from the next contiguous /25 prefix per branch
Answer: A
Explanation:
For example:
Site 0001
Data:10.0.0.0/24
Voice: 10.0.1.0/24
summary route : 10.0.0.0/23
Site 0002
Data:10.0.2.0/24
Voice: 10.0.3.0/24
summary route: 10.0.2.0/23
....cont...
site 0129
Data:10.1.0.0/24
Voice: 10.1.1.0/24
summary route: 10.1.0.0/23
site 0130
Data:10.1.2.0/24
Voice: 10.1.3.0/24
summary route: 10.1.2.0/23
so 3rd octet is odd number assigned to voice, and even number assigned to data; for security team to recongize voice prefix, use an ACL with wildcast to filter odd number on third octet, started from 10.0.1.0 0.0.254.255, 10.1.1.0 0.0.254.255......, 10.1.1.0 0.0.254.255 etc; for 10.0.1.0 0.0.254.255, any IP in binary that started with 00001010.00000000.xxxxxxx1.xxxxxxxx will be matched (x = either 0 or 1), covert 3rd octet into dec, for example, 10000001 = 129 which is a voice VLAN.
NEW QUESTION # 109
Which design consideration must be made when using IPv6 overlay tunnels?
- A. Overlay tunneling encapsulates IPv4 packets in IPv6 packets for delivery across an IPv6 infrastructure.
- B. Overlay tunnels should only be considered as a transition technique toward a permanent solution.
- C. Overlay tunnels that connect isolated IPv6 networks can be considered a final IPv6 network architecture.
- D. Overlay tunnels can be configured only between border devices and require only the IPv6 protocol stack.
Answer: B
Explanation:
Explanation
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/interface/configuration/xe-3s/ir-xe-3s-book/ip6-ip4-gre-tunls-
"The use of overlay tunnels should be considered as a transition technique toward a network that supports both the IPv4 and IPv6 protocol stacks or just the IPv6 protocol stack."
NEW QUESTION # 110
Which design element should an engineer consider when multicast is included in a Cisco SD-Access architecture?
- A. Multicast clients reside in the underlay, and the multicast source is outside the fabric or in the overlay.
- B. PIM SSM must run in the underlay.
- C. Rendezvous points must be used in a PIM SSM deployment.
- D. Multicast traffic is transported in the overlay and the EID space for wired and wireless clients.
Answer: A
NEW QUESTION # 111
An engineer must design a scalable QoS architecture that allows the separation of the traffic into classes on predefined business requirements. The design must also utilize the differentiated services code points as the QoS priority descriptor value and support at least 10 levels of classification. Which QoS technology should the engineer include in the design?
- A. Best effort
- B. Interserv
- C. RSVP
- D. Diffserv
Answer: D
NEW QUESTION # 112
Refer to the exhibit. An architect must create a stable and scalable EIGRP solution for a customer. The design must:
* conserve bandwidth, memory, and CPU processing
* prevent suboptimal routing
* avoid any unnecessary queries
Which two solutions must the architect select? (Choose two.)
- A. stub routing
- B. distribute lists
- C. prefix lists
- D. route summarization
- E. static redistribution
Answer: A,D
NEW QUESTION # 113
Which feature provides the capability for intra-VN traffic filtering and control within the Cisco SO-Access architecture?
- A. scalable groups
- B. service policy
- C. MAC ACL
- D. prefix list
Answer: A
NEW QUESTION # 114
An engineer is designing an EIGRP network for a small branch site where there is only one Layer 3 router. The engineer wants the router to advertise the local LAN network to remote EIGRP neighbors without sending any unnecessary multicast messages on the local LAN. Which action should the engineer take?
- A. Advertise the local LAN using the network command and the passive-interface feature
- B. Advertise the local LAN subnet as a stub network
- C. Use a static default route for this site instead of EIGRP
- D. Redistribute the local LAN network using the redistribute connected command
Answer: A
Explanation:
Section: Advanced Addressing and Routing Solutions
NEW QUESTION # 115 
Refer to the exhibit. An engineer must optimize the traffic flow of the network. Which change provides a more efficient design between the access and the distribution layer?
- A. Reconfigure the distribution switch A to become the HSRP Active
- B. Add a link between access switch A and access switch B
- C. Change the link between distribution switch A and distribution switch B to be a routed link
- D. Create an EtherChannel link between distribution switch A and distribution switch B
Answer: A
NEW QUESTION # 116
Drag and drop the description from the left onto the corresponding WAN connectivity types and categories on the right.
Answer:
Explanation:
Explanation
Diagram Description automatically generated
NEW QUESTION # 117
Refer to the exhibit.
Which solution decreases the EIGRP convergence time?
- A. Increase the dead timer value
- B. Enable stub routing on the spokes
- C. Enable subsecond timers
- D. Increase the hold time value
Answer: B
NEW QUESTION # 118
Which PIM mode uses a shared tree only?
- A. bidirectional
- B. source-specific
- C. sparse
- D. dense
Answer: C
NEW QUESTION # 119
An organization is designing a detailed QoS plan that limits bandwidth to specific rates. Which two parameters are supported be the traffic policing feature? (Choose two.)
- A. bursting
- B. conforming
- C. marking
- D. violating
- E. shaping
Answer: C,E
Explanation:
Section: Network Services
NEW QUESTION # 120
Exhibit:
- A. Make R3 an L1L2 router.
- B. Make Area 0 L2-only.
- C. Make R11 an L2 router.
- D. Make R31 an L1 router.
Answer: A
Explanation:
ENSLD 300-420 cert guide page 117. When creating a backbone there should never be L1 routers between (L2 only, or) L1/L2 routers.
NEW QUESTION # 121
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. spanning-tree uplinkfast on SW1
- B. IP directed-broadcasts on R1
- C. IP directed-broadcasts on R2
- D. spanning-tree uplinkfast on SW2
Answer: C
Explanation:
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
NEW QUESTION # 122
Refer to the exhibit. An engineer is designing an OSPF network for a client. Requirements dictate that the routers in Area 1 should receive all routes belonging to the network, including EIGRP, except the ones originated in the RIP domain. Which action should the engineer take?
- A. Make area 1 a stub.
- B. Make area 1 a NSSA.
- C. Make area 1 a standard OSPF area.
- D. Make the area 1 routers part of area 0.
Answer: B
Explanation:
NEW QUESTION # 123
An engineermustdesign a management network for a customer's enterprise network. The design must:
* provide the ability to grant and revoke access privileges
* allow only protocols SSH, NTP, FTP, and SNMP
* restrict access to management Interfaces
Which solution must the engineer choose to meet the requirements?
- A. mGRE
- B. in-band
- C. enterprise internal private
- D. out-of-band
Answer: D
NEW QUESTION # 124
Refer to the exhibit.
Refer to the exhibit. An architect reviews the low-level design of a company's enterprise network and advises optimizing the STP convergence time. Which functionality must be to Gi1/0/1-10 to follow the architect's recommendation?
- A. UplinkFast
- B. PortFast
- C. root guard
- D. BPDU guard
Answer: B
NEW QUESTION # 125
Refer to the exhibit.
An architect is designing an EIGRP solution based on these requirements:
* Traffic forwarding should use the best two paths while all links are available
* Single path failure must not impact traffic between branch and HQ
Which solution must the architect select?
- A. Metric weights 010100
- B. Add-paths 2
- C. Variance 2
- D. Maximum-paths 2
Answer: C
Explanation:
Explanation
ENSLD cert guide page 113. shortest path = 900, next 1700 and finally 3300 for the worst path. Witch variance 2, all routes under 1800 (900x2) become active.
NEW QUESTION # 126
......
Cisco 300-420 Exam Topics:
| Section | Weight | Objectives |
|---|---|---|
| Advanced Enterprise Campus Networks | 25% | - Design campus networks for high availability
-Design campus Layer 2 infrastructures
-Design multicampus Layer 3 infrastructures
-Describe SD-Access Architecture (underlay, overlay, control and data plane, automation, wireless, and security) |
| Automation | 10% | - Choose the correct YANG data model set based on requirements -Differentiate between IETF, Openconfig, and Cisco native YANG models -Differentiate between NETCONF and RESTCONF -Describe the impact of model-driven telemetry on the network
-Compare dial-in and dial-out approaches to model-driven telemetry |
| WAN for Enterprise Networks | 20% | -Compare WAN connectivity options
-Design site-to-site VPN
-Design high availability for enterprise WAN
-Describe Cisco SD-WAN Architecture (orchestration plane, management plane, control plane, data plane, on-boarding and provisioning, security) |
| Advanced Addressing and Routing Solutions | 25% | -Create structured addressing plans for IPv4 and IPv6 -Create stable, secure, and scalable routing designs for IS-IS -Create stable, secure, and scalable routing designs for EIGRP -Create stable, secure, and scalable routing designs for OSPF -Create stable, secure, and scalable routing designs for BGP
-Determine IPv6 migration strategies
|
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