Jul-2023 300-420 Study Material, Preparation Guide and PDF Download [Q89-Q112]

NO.89 A large chain of stores currently uses MPLS-based T1 lines to connect their stores to their data center. An architect must design a new solution to improve availability and reduce costs while keeping these considerations in mind:
* The company uses multicast to deliver training to the stores.
* The company uses dynamic routing protocols and has implemented QoS.
* To simplify deployments, tunnels should be created dynamically on the hub when additional stores open.
Which solution should be included in this design?

VPLS

GET VPN

DMVPN

IPsec

NO.90 An engineer must design an addressing plan for a small business using a single /24 network. Each department must have its own subnet. Drag and drop the subnets from the left onto the departments requirements that they fulfill on the right. Not all options are used.

NO.91 An engineer must design an addressing plan for a small business using a single /24 network. Each department must have its own subnet. Drag and drop the subnets from the left onto the departments requirements that they fulfill on the right. Not all options are used.

NO.92 A customer with an IPv4 only network topology wants to enable IPv6 connectivity while preserving the IPv4 topology services. The customer plans to migrate IPv4 services to the IPv6 topology, then decommission the IPv4 topology. Which topology supports these requirements?

dual stack

6VPE

6to4

NAT64

NO.93 Drag and drop the characteristics from the left onto the correct telemetry mode on the right.

NO.94 An architect must design an IPv6 migration solution for a corporation with remote offices to support:
* The customer has IPv4 peering with their service provider.
* IPv6 users need access to IPv4 and IPv6 resources.
* Existing content providers will migrate to IPv6 in the next two years.
* Users will be migrated in a phase-by-phase approach.
Which migration solution must the architect choose?

NAT46

tunneling

NAT64

dual-stack

NO.95 How do endpoints inside an SD-Access network reach resources outside the fabric?

a VRF fusion router is used to map resources in one VN to another VN

Fabric borders use VRFs to map VNs to VRFs

SD-Access transit links are used to transport encapsulated traffic from one fabric to another

A fabric edge is used to de-encapsulate VXLAN traffic to normal IP traffic then transported over the outside network

NO.96 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?

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

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

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

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

NO.97

Refer to the exhibit. An engineer is planning an IPv4 to IPv6 migration solution for a customer. The routers in the network can support IPv4 and IPv6, except for the DWDM routers. The DWDM routers provide a Layer 2 link in which the routers peer directly with each other across a DWDM circuit. The circuit also provides connectivity between the mail servers. Which IPv6 migration technique must the engineer deploy?

dual-stack

6to4

ISATAP

6rd

NO.98 Refer to the exhibit.

Refer to the exhibit. An architect must design a solution to connect the two ASs. To optimize bandwidth, the design will implement load sharing between router R6 and router R4. Which solution should the design include?

Use update-source to specify the Loopback interface.

Use next-hop-serf attributes only for routes that are learned from eBGP peers.

Configure the eBGP TTL to support eBGP multihop.

Use maximum-paths to install multiple paths in the routing table.

NO.99 Which design element should an engineer consider when multicast is included in a Cisco SD-Access architecture?

PIM SSM must run in the underlay.

Multicast clients reside in the underlay, and the multicast source is outside the fabric or in the overlay.

Rendezvous points must be used in a PIM SSM deployment.

Multicast traffic is transported in the overlay and the EID space for wired and wireless clients.

NO.100 In an SD-WAN architecture, which methods are used to bootstrap a vEdge router?

DHCP options or manual configuration

vManage or DNS records

ZTP or manual configuration

DNS records or DHCP options

NO.101 An engineer must use YANG with an XML representation to configure a Cisco IOS XE switch with these specifications:
* IP address 10.10.10.10/27 configured on the interface GigabitEthernet2/1/0
* connectivity from a directly connected host 10.10.10.1/27
Which YANG data model set must the engineer choose?
A)

B)

C)

D)

Option A

Option B

Option C

Option D

NO.102 How is redundancy achieved among Cisco vBond Orchestrators in a Cisco SD-WAN deployment?

The IP addresses of all Orchestrators are mapped to a single DNS name.

The closest Orchestrator to each Cisco WAN Edge router is selected.

Cisco WAN Edge routers are configured with all Orchestrators using their IP addresses and priority.

A single Cisco Orchestrator is deployed in each network.

NO.103 Drag and drop the properties from the left onto the protocols they describe on the right.

NO.104 Drag and drop the characteristics from the left onto the configuration protocols they describe on the right.

NO.105 Drag and drop the properties from the left onto the Cisco SD-WAN components that perform them on the right.

NO.106 Refer to the exhibit. An IPv6 network was just deployed in the environment and the help desk has reported that R3 is not able to SSH to R2’s Loopback interface. Which sequence number of the filter is preventing access?

10

20

30

70

NO.107 A branch office has a primary L3VPN MPLS connection back to the main office and an IPSEC VPN tunnel that serves as backup. Which design ensures that data is sent over the backup connection only if the primary MPLS circuit is down?

Use EIGRP to establish a neighbor relationship with the main office via L3VPN MPLS and the IPSEC VPN tunnel.

Use BGP with the multipath feature enabled to force traffic via the primary path when available.

Use static routes tied to an IP SLA to prefer the primary path while a floating static route points to the backup connection.

Use OSPF with a passive-interface

NO.108 An engineer is designing a multicast network for a company specializing in VoD content. Receivers are across the Internet, and for performance reasons, the multicast framework close to the receivers within each AS. For high availability, if the sources in one AS are no longer available, the receivers of that AS must be able to receive the VoD content from sources in another AS. Which feature must the design include?

Bidirectional PIM

SSM

Anycast RP

MSDP

NO.109 An engineer must design a solution to connect a customer to the Internet. The solution will include a Layer 3 circuit with a CIR of 50 Mbps from the service provider. The hand-off from the provider’s switch to the customer’s router is 1Gbps. Which solution should the engineer include to prevent potential issues with choppy voice traffic?

Reduce the bandwidth of the connection to the router.

Implement hierarchical QoS with a parent policing policy.

Implement hierarchical QoS with a parent shaping policy.

Add a bandwidth statement to the router interface.

NO.110 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?

Increase the hello timers on both HSRP devices

Use the preempt delay feature on the primary HSRP device.

Use the preempt delay feature on the backup HSRP device

Configure a higher mac-refresh interval on both HSRP devices

NO.111 Drag and drop the model driven telemetry characteristics from the left onto the mode they belong to on the right.