Cisco 300-420 Exam Dumps, Practice Test Questions

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 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: A routed campus uses DHCP snooping on access switches but marks every endpoint port trusted for convenience. It is not the failure mode evidenced here.

That hazard arises in a separate case: A source sends multicast through one router but users join from another site and no multicast routing is configured between them. It is not the failure mode evidenced here.

That hazard arises in a separate case: A multicast source is reachable through an interface other than the one receiving the packet, but the router still forwards it to all receivers. It is not the failure mode evidenced here.

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: A router receives two EIGRP routes for a prefix with different metrics and the design team wants deterministic failover. 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 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 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 retail design directs all cloud SaaS traffic through headquarters even though local internet breakout is allowed and latency is poor. 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: 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 routing telemetry client assumes every operational counter supports on-change updates and receives no updates on one platform. It is not the failure mode evidenced here.

That hazard arises in a separate case: A standards group needs an interoperable interface model but mistakenly calls every IETF YANG module an OpenConfig model. 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: A regional core accepts all branch routes and one lab site leaks its test 0.0.0.0/0 default into the global table. It is not the failure mode evidenced here.

That hazard arises in a separate case: A campus design requires both distribution uplinks active but the chosen topology uses classic STP on all Layer 2 connections. It is not the failure mode evidenced here.

That hazard arises in a separate case: A security design requires authenticating OSPF control packets on shared routed links, but only one neighbor has authentication enabled. It is not the failure mode evidenced here.

That hazard arises in a separate case: A large enterprise wants to contain detailed IS-IS prefixes within buildings while preserving intercampus reachability. 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: 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: 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 routed campus uses DHCP snooping on access switches but marks every endpoint port trusted for convenience. It is not the failure mode evidenced here.

That hazard arises in a separate case: A multicast source is reachable through an interface other than the one receiving the packet, but the router still forwards it to all receivers. 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.

This offered choice, “Marking packets alone does not guarantee queue service under oversubscription”, addresses a separate concern. That option relates to this separate design case: A regional WAN prioritizes voice using a DiffServ marking but provides no scheduler preference on its congested egress link. It does not answer the current requirement.

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 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 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 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 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: An enterprise uses hundreds of IPv4 /24s and proposes a single /16 summary although several component /24s are outside its administrative control. It is not the failure mode evidenced here.