Cisco 300-420 Exam Dumps, Practice Test Questions

That hazard arises in a separate case: A switch must remotely wake office PCs overnight, but the access port powers down and the design assumes Wake-on-LAN works regardless of power state. It is not the failure mode evidenced here.

That hazard arises in a separate case: A guest workstation port can learn hundreds of source MAC addresses because an unmanaged mini-switch is connected behind it. It is not the failure mode evidenced here.

That hazard arises in a separate case: IP phones and cameras are scheduled for a new closet, but PoE budget is calculated only from the switch's total port count. It is not the failure mode evidenced here.

That hazard arises in a separate case: A company wants most return traffic for its public prefix to enter ISP B rather than ISP A. It is not the failure mode evidenced here.

That hazard arises in a separate case: A network uses IS-IS with dual distribution routers and wants predictable traffic away from a low-bandwidth backup path. It is not the failure mode evidenced here.

That hazard arises in a separate case: A dual-stack enterprise BGP peer exchanges IPv4 NLRI but no IPv6 routes despite IPv6 addressing on the transport. It is not the failure mode evidenced here.

That hazard arises in a separate case: A support dashboard needs regular CPU and interface-rate samples even when values remain unchanged. It is not the failure mode evidenced here.

That hazard arises in a separate case: An NOC polls every router with SNMP once every ten minutes and misses 30-second interface utilization spikes. It is not the failure mode evidenced here.

That hazard arises in a separate case: A global WAN telemetry system publishes a complete 10,000-interface snapshot every 100 ms although the target is only five-minute capacity planning. It is not the failure mode evidenced here.

That hazard arises in a separate case: A PIM-SM domain has active receivers but no working rendezvous-point reachability for new source registration. It is not the failure mode evidenced here.

That hazard arises in a separate case: Two sites use different DSCP mappings for the same video stream and one class is downgraded at the carrier boundary. 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 small branch must use both Internet and private MPLS, and engineers assume the two underlays cannot coexist on one SD-WAN edge. It is not the failure mode evidenced here.

That hazard arises in a separate case: Two WAN routers advertise the same prefix to separate providers, but the branch returns traffic through a firewall that tracks only one side of the asymmetric flow. 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: IP phones and cameras are scheduled for a new closet, but PoE budget is calculated only from the switch's total port count. It is not the failure mode evidenced here.

That hazard arises in a separate case: An attacker plugs an unmanaged switch into a lobby edge port and advertises superior STP BPDUs, changing the root topology. It is not the failure mode evidenced here.

That hazard arises in a separate case: A building has two independent distribution switches but hosts use the physical IP of one switch as their default gateway. It is not the failure mode evidenced here.

That hazard arises in a separate case: An edge router receives a full BGP table where the security policy allows only the provider's approved default. It is not the failure mode evidenced here.

That hazard arises in a separate case: A BGP customer has two provider uplinks and wants automatic loss-of-transport detection when the BGP session remains Established over a stale recursive path. 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 new multicast source uses group 232.1.1.1 but the client sends only (*,G) membership instead of a source-specific join. It is not the failure mode evidenced here.

That hazard arises in a separate case: The RPF interface changes after a unicast route failover, but the multicast router retains stale upstream join state. It is not the failure mode evidenced here.

That hazard arises in a separate case: Video and voice both use one strict-priority queue, causing voice jitter when video surges. It is not the failure mode evidenced here.

That hazard arises in a separate case: An enterprise replaces a point-to-point GRE tunnel with raw IPsec ESP and expects dynamic multicast routing hellos to work unchanged. It is not the failure mode evidenced here.

That hazard arises in a separate case: An SD-WAN fabric routes guest traffic into the production VPN because a new edge reused the corporate service VPN identifier. It is not the failure mode evidenced here.

That hazard arises in a separate case: A branch uses IPsec overlay on broadband with 1400-byte effective MTU, but an application sends 1500-byte DF-set packets and stalls. 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.

That hazard arises in a separate case: Multiple access switches connect to one distribution block through independent Layer 2 uplinks with a blocked redundant path. It is not the failure mode evidenced here.

That hazard arises in a separate case: Two campus distribution routers each have a single power feed from the same rack PDU, yet the architecture counts them as separate fault domains. It is not the failure mode evidenced here.

That hazard arises in a separate case: A retailer adds 70 branches and reused 10.20.0.0/16 at several sites; the MPLS provider cannot distinguish the overlapping prefixes in the enterprise routing table. It is not the failure mode evidenced here.

That hazard arises in a separate case: A service provider backbone runs IS-IS level-1 only across multiple areas, and distant branch routers cannot obtain interarea routes. It is not the failure mode evidenced here.

That hazard arises in a separate case: An organization needs to reach an IPv6 island over a provider network that carries IPv4 only for the next year. It is not the failure mode evidenced here.