Cisco 300-420 Exam Dumps, Practice Test Questions

This observation would validate a different case: A provider delegation contains 2001:db8:4200::/48 and the design requires 256 independent /64 LANs across 16 branches. It does not establish the target outcome for this topology.

This observation relates to a different topology: A service provider backbone runs IS-IS level-1 only across multiple areas, and distant branch routers cannot obtain interarea routes. It does not verify the present outcome.

This observation relates to a different topology: An edge router receives a full BGP table where the security policy allows only the provider's approved default. It does not verify the present outcome.

That hazard arises in a separate case: A campus OSPF area 0 is split into disconnected islands connected only by another area; route distribution is unstable. It is not the failure mode evidenced here.

That hazard relates to another condition: A provider delegation contains 2001:db8:4200::/48 and the design requires 256 independent /64 LANs across 16 branches. It is not the direct risk evidenced by this case.

That hazard arises in a separate case: A dual-provider BGP edge must prefer ISP A for outbound traffic, but inbound updates from A have a lower MED than B and engineers assume MED dictates every decision. It is not the failure mode evidenced here.

That hazard arises in a separate case: An automation team expects NETCONF transactions over SSH to behave like stateless HTTP GET calls with no session or lock semantics. It is not the failure mode evidenced here.

That hazard arises in a separate case: A customer rents virtual machines from a provider and must patch their operating systems, but procurement classifies the service as SaaS. It is not the failure mode evidenced here.

That hazard arises in a separate case: A Cisco-only controller needs platform-specific wireless policies that are not represented by the organization's standard OpenConfig model. It is not the failure mode evidenced here.

That hazard arises in a separate case: A dual-carrier WAN design changes to backup but automatically switches back on every momentary primary heartbeat recovery. It is not the failure mode evidenced here.

That hazard arises in a separate case: Backup 5G is installed at a factory but its data plan and APN firewall rules block VPN establishment after primary fiber failure. It is not the failure mode evidenced here.

That hazard arises in a separate case: A branch has broadband backup with no QoS controls and a voice service drops under failover saturation. It is not the failure mode evidenced here.

That hazard arises in a separate case: A campus with several hundred VLANs uses one active HSRP gateway for all VLANs while another distribution router remains mostly idle. It is not the failure mode evidenced here.

That hazard arises in a separate case: A design extends SDA fabric across buildings on a WAN with 1500-byte MTU and assumes local campus performance will continue unchanged. It is not the failure mode evidenced here.

That hazard arises in a separate case: A virtualized distribution pair uses one logical control plane and engineers assume it offers separate failure domains like two chassis in different buildings. It is not the failure mode evidenced here.

That hazard arises in a separate case: Network management of a branch uses a VPN over its sole primary WAN, and the organization reports no way to diagnose a provider outage. It is not the failure mode evidenced here.

That hazard arises in a separate case: A many-to-many trading network has multiple multicast senders and a scalable shared-tree forwarding requirement. It is not the failure mode evidenced here.

That hazard arises in a separate case: A campus firewall isolates management VRFs but its shared-services route leaking exports all loopbacks to the guest VRF. It is not the failure mode evidenced here.

That hazard arises in a separate case: A campus OSPF area 0 is split into disconnected islands connected only by another area; route distribution is unstable. It is not the failure mode evidenced here.

That hazard arises in a separate case: A remote branch uses an OSPF stub area but a design change introduces an ASBR that must redistribute external routes within it. It is not the failure mode evidenced here.

That hazard arises in a separate case: Branches summarize their local EIGRP networks at a hub-facing boundary, but a detached subnet is included in the summary. It is not the failure mode evidenced here.

That hazard arises in a separate case: A campus has a fabric border but its external firewall cannot distinguish multiple endpoint VNs leaving the fabric. It is not the failure mode evidenced here.

That hazard arises in a separate case: Fabric edge nodes encapsulate packets, but the underlay path MTU is too small for added VXLAN overhead. It is not the failure mode evidenced here.

That hazard arises in a separate case: Users roam between wired fabric edge switches but their identity assignments change with switch port, breaking microsegmentation. It is not the failure mode evidenced here.

That hazard arises in a separate case: A QoS controller marks all backup data DSCP AF41 while the provider honors it as a premium video class. It is not the failure mode evidenced here.

That hazard arises in a separate case: Remote branch routers are managed using the same public internet IP address that exposes a user web service. It is not the failure mode evidenced here.

That hazard arises in a separate case: A WAN provider accepts only three traffic classes but headquarters configures eight local DSCP queues and assumes all survive the handoff. It is not the failure mode evidenced here.

That hazard arises in a separate case: Backup 5G is installed at a factory but its data plan and APN firewall rules block VPN establishment after primary fiber failure. It is not the failure mode evidenced here.

That hazard arises in a separate case: A global business wants to connect its datacenter and branches on two different MPLS L3VPN providers with no accidental route leak between customers. It is not the failure mode evidenced here.

That hazard arises in a separate case: A bank contracts two MPLS providers but both fiber tails enter the building through the same conduit. It is not the failure mode evidenced here.

That hazard arises in a separate case: A remote campus uses two distribution switches and requires nonstop gateway access during a planned supervisor replacement. It is not the failure mode evidenced here.

That hazard arises in a separate case: A wireless access-point refresh increases PoE needs above the available 802.3at class on older switches. It is not the failure mode evidenced here.

That hazard arises in a separate case: Two access switches uplink to a distribution pair; the architecture stretches one port channel across chassis without verifying multi-chassis support. It is not the failure mode evidenced here.