Cisco 300-420 Exam Dumps, Practice Test Questions

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 branch aggregation point has both IS-IS and OSPF neighbors with multiple equal-cost exits; traffic unexpectedly hairpins through a data center. It is not the failure mode evidenced here.

That hazard arises in a separate case: An SD-Access architect assumes the fabric's LISP control plane transports all user packets like a data-plane tunnel. It is not the failure mode evidenced here.

That hazard arises in a separate case: An OSPF deployment puts all 600 remote access switches into area 0 and floods changes to every site. It is not the failure mode evidenced here.

That hazard arises in a separate case: A new IPv6-only client subnet must access a legacy IPv4-only web endpoint through an enterprise gateway. It is not the failure mode evidenced here.

That hazard arises in a separate case: A branch engineer redistributes a static default route into EIGRP and advertises it to every site, overriding the intended hub defaults. 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: An enterprise's primary WAN circuit fails but BGP route withdrawal is delayed while the underlay interface remains up. 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 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 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: 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 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 campus has out-of-band console servers but all consoles depend on the production AAA server reachable only over the failed production network. It is not the failure mode evidenced here.

That hazard arises in a separate case: A hospital asks for guaranteed per-flow service across 300 branches and considers IntServ RSVP state on every core router. It is not the failure mode evidenced here.

That hazard arises in a separate case: The IS-IS backbone has a router in overload state after reboot and operators mistake it for an ordinary forwarding transit. It is not the failure mode evidenced here.

That hazard arises in a separate case: A merger requires two administrative BGP regions to appear as one external AS while reducing iBGP mesh size internally. It is not the failure mode evidenced here.

That hazard arises in a separate case: Branch A and B redistribute external BGP into OSPF, then advertise resulting routes back into BGP at the opposite edge. It is not the failure mode evidenced here.

That hazard arises in a separate case: A routed-access campus needs equal-cost forwarding to two distribution routers while keeping each VLAN local to one wiring closet. 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: 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: 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 site-to-site tunnel must protect financial payload confidentiality and integrity across the public internet. It is not the failure mode evidenced here.

That hazard arises in a separate case: Two industrial sites require transparent delivery of a small set of Ethernet services and reject routing between their private LANs. 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: A campus designs priority queues only on the access switch but ignores a congested upstream WAN edge. It is not the failure mode evidenced here.

That hazard arises in a separate case: Two business units share one management VLAN with unrestricted access to each other's routers. It is not the failure mode evidenced here.

That hazard arises in a separate case: A campus border is configured with two equal-cost external BGP paths but only one is installed for traffic forwarding. It is not the failure mode evidenced here.

That hazard arises in a separate case: An EIGRP core has routes stuck active after one WAN path fails and queries spread into many remote sites. It is not the failure mode evidenced here.

That hazard arises in a separate case: A branch EIGRP router advertises remote routes back into its hub and occasionally becomes a transit path between hubs. 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 fabric site needs a guest wireless SSID without extending the guest Layer 2 domain across the whole enterprise. 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.