Exam Bundle

That observation verifies bfd versus routing discovery in a different situation, such as when an engineer deploys BFD and assumes it will discover routes without an associated routing or tracking client. For the reported pbr on wrong interface incident at an airport infrastructure network in Dubai, the required acceptance evidence is: Matching inbound traffic follows the policy next hop while unmatched traffic continues normal routing. This other result does not test that condition directly.

That observation verifies ibgp next-hop preservation in a different situation, such as when a router learns an eBGP route through iBGP but its NEXT_HOP points at an unreachable border address. For the reported pbr on wrong interface incident at an airport infrastructure network in Dubai, the required acceptance evidence is: Matching inbound traffic follows the policy next hop while unmatched traffic continues normal routing. This other result does not test that condition directly.

That observation verifies longest prefix before ad in a different situation, such as when a host matches an OSPF /24 and a lower-AD static /16; operations assumes the static summary must forward the packet. For the reported pbr on wrong interface incident at an airport infrastructure network in Dubai, the required acceptance evidence is: Matching inbound traffic follows the policy next hop while unmatched traffic continues normal routing. This other result does not test that condition directly.

That approach is relevant to ip sla state versus reachability, such as when an operator sees the IP SLA probe return an over-threshold result and assumes the same as complete reachability failure. That is a different root cause from the ip sla track debounce fault observed at a corporate IT backbone in Chicago. Applying that approach alone would not establish the required result: Short transient losses no longer cause unnecessary route churn while sustained failure still triggers fallback.

That approach is relevant to ip sla tracked floating default, such as when a static primary route remains in the RIB after upstream reachability fails because it tracks interface status only. That is a different root cause from the ip sla track debounce fault observed at a corporate IT backbone in Chicago. Applying that approach alone would not establish the required result: Short transient losses no longer cause unnecessary route churn while sustained failure still triggers fallback.

That approach is relevant to ip sla jitter measurement, such as when a voice service suffers variation in packet delay but is monitored only with a simple ICMP success rate. That is a different root cause from the ip sla track debounce fault observed at a corporate IT backbone in Chicago. Applying that approach alone would not establish the required result: Short transient losses no longer cause unnecessary route churn while sustained failure still triggers fallback.

That observation verifies ip sla http operation in a different situation, such as when iCMP probes succeed but an application URL fails, and a network team considers basic ping sufficient proof of service health. For the reported ip sla track debounce incident at a corporate IT backbone in Chicago, the required acceptance evidence is: Short transient losses no longer cause unnecessary route churn while sustained failure still triggers fallback. This other result does not test that condition directly.

That observation verifies ip sla timeout settings in a different situation, such as when a synthetic probe's timeout is shorter than normal expected WAN latency, making a usable path seem dead. For the reported ip sla track debounce incident at a corporate IT backbone in Chicago, the required acceptance evidence is: Short transient losses no longer cause unnecessary route churn while sustained failure still triggers fallback. This other result does not test that condition directly.

That observation verifies ip sla jitter measurement in a different situation, such as when a voice service suffers variation in packet delay but is monitored only with a simple ICMP success rate. For the reported ip sla track debounce incident at a corporate IT backbone in Chicago, the required acceptance evidence is: Short transient losses no longer cause unnecessary route churn while sustained failure still triggers fallback. This other result does not test that condition directly.

That approach is relevant to ipv6 source guard, such as when a client spoofs an IPv6 source address not associated with its access port and evades ordinary destination filtering. That is a different root cause from the ipv6 binding table role fault observed at a multi-tenant facility in Dublin. Applying that approach alone would not establish the required result: Legitimate bindings are present and source/neighbor validation no longer drops valid traffic.

That approach is relevant to ipv6 rogue router advertisements, such as when an untrusted access port sends IPv6 Router Advertisements and changes hosts' default gateway. That is a different root cause from the ipv6 binding table role fault observed at a multi-tenant facility in Dublin. Applying that approach alone would not establish the required result: Legitimate bindings are present and source/neighbor validation no longer drops valid traffic.

That approach is relevant to ipv6 nd spoofing, such as when an attacker injects forged Neighbor Advertisements to redirect local IPv6 traffic. That is a different root cause from the ipv6 binding table role fault observed at a multi-tenant facility in Dublin. Applying that approach alone would not establish the required result: Legitimate bindings are present and source/neighbor validation no longer drops valid traffic.

That observation verifies ra guard trusted boundary in a different situation, such as when rA Guard is deployed only on the legitimate router-facing port instead of the untrusted host-facing ports. For the reported ipv6 binding table role incident at a multi-tenant facility in Dublin, the required acceptance evidence is: Legitimate bindings are present and source/neighbor validation no longer drops valid traffic. This other result does not test that condition directly.

That observation verifies ipv6 source guard in a different situation, such as when a client spoofs an IPv6 source address not associated with its access port and evades ordinary destination filtering. For the reported ipv6 binding table role incident at a multi-tenant facility in Dublin, the required acceptance evidence is: Legitimate bindings are present and source/neighbor validation no longer drops valid traffic. This other result does not test that condition directly.

That observation verifies ipv6 nd trust validation in a different situation, such as when a first-hop protection policy is copied from a different VLAN and treats all access ports as trusted for neighbor discovery. For the reported ipv6 binding table role incident at a multi-tenant facility in Dublin, the required acceptance evidence is: Legitimate bindings are present and source/neighbor validation no longer drops valid traffic. This other result does not test that condition directly.

That approach is relevant to nhrp cache verification, such as when a direct spoke route exists but its tunnel next hop lacks a corresponding NHRP resolution entry. That is a different root cause from the spoke multicast static mapping fault observed at an energy services network in Calgary. Applying that approach alone would not establish the required result: The hub receives spoke routing-control traffic and the expected adjacency establishes.

That approach is relevant to dmvpn mgre hub, such as when a single-hub DMVPN must support many dynamically registered spokes, but the hub tunnel is configured as a fixed point-to-point GRE tunnel. That is a different root cause from the spoke multicast static mapping fault observed at an energy services network in Calgary. Applying that approach alone would not establish the required result: The hub receives spoke routing-control traffic and the expected adjacency establishes.

That approach is relevant to static hub mapping at spoke, such as when a spoke cannot send initial NHRP requests because it has no mapping from the hub's tunnel address to the reachable NBMA address. That is a different root cause from the spoke multicast static mapping fault observed at an energy services network in Calgary. Applying that approach alone would not establish the required result: The hub receives spoke routing-control traffic and the expected adjacency establishes.

That observation verifies static hub mapping at spoke in a different situation, such as when a spoke cannot send initial NHRP requests because it has no mapping from the hub's tunnel address to the reachable NBMA address. For the reported spoke multicast static mapping incident at an energy services network in Calgary, the required acceptance evidence is: The hub receives spoke routing-control traffic and the expected adjacency establishes. This other result does not test that condition directly.

That observation verifies dmvpn nhrp network id mismatch in a different situation, such as when the hub and spoke use different NHRP network identifiers despite otherwise consistent tunnel addressing. For the reported spoke multicast static mapping incident at an energy services network in Calgary, the required acceptance evidence is: The hub receives spoke routing-control traffic and the expected adjacency establishes. This other result does not test that condition directly.

That observation verifies ipsec ike proposal mismatch in a different situation, such as when dMVPN NHRP can see underlay reachability but the IPsec negotiation fails because IKE policies have no compatible proposal. For the reported spoke multicast static mapping incident at an energy services network in Calgary, the required acceptance evidence is: The hub receives spoke routing-control traffic and the expected adjacency establishes. This other result does not test that condition directly.

That approach is relevant to route-map tag set, such as when at the redistribution edge, a permitted route enters a second protocol without its required provenance tag. That is a different root cause from the routing tag boundary fault observed at a university backbone in Sydney. Applying that approach alone would not establish the required result: A route returned toward its originating protocol is filtered according to its preserved tag.

That approach is relevant to bidirectional redistribution loop, such as when oSPF routes are redistributed into EIGRP and then back into OSPF at another border, creating repeated route feedback. That is a different root cause from the routing tag boundary fault observed at a university backbone in Sydney. Applying that approach alone would not establish the required result: A route returned toward its originating protocol is filtered according to its preserved tag.

That approach is relevant to ospf default originate conditional, such as when the border router should originate an OSPF default only while it has a usable upstream default but neighbors receive none. That is a different root cause from the routing tag boundary fault observed at a university backbone in Sydney. Applying that approach alone would not establish the required result: A route returned toward its originating protocol is filtered according to its preserved tag.

That observation verifies route-map attachment direction in a different situation, such as when a prefix policy meant to constrain inbound BGP routes is applied only outbound to the peer. For the reported routing tag boundary incident at a university backbone in Sydney, the required acceptance evidence is: A route returned toward its originating protocol is filtered according to its preserved tag. This other result does not test that condition directly.

That observation verifies route-map deny behavior in a different situation, such as when an administrator expects a route-map deny clause to set a new metric for a redistributed route. For the reported routing tag boundary incident at a university backbone in Sydney, the required acceptance evidence is: A route returned toward its originating protocol is filtered according to its preserved tag. This other result does not test that condition directly.

That observation verifies connected route redistribution oversight in a different situation, such as when an attached transit network is mistakenly redistributed into an IGP intended only to carry service prefixes. For the reported routing tag boundary incident at a university backbone in Sydney, the required acceptance evidence is: A route returned toward its originating protocol is filtered according to its preserved tag. This other result does not test that condition directly.

That approach is relevant to dhcp relay udp filtering, such as when router helpers are correctly configured but remote clients time out because DHCP request/response UDP transport is blocked between relay and server. That is a different root cause from the dhcp giaddr subnet selection fault observed at a financial services WAN in Toronto. Applying that approach alone would not establish the required result: The server issues leases from the subnet associated with the actual relay client segment.

That approach is relevant to dhcpv6 relay missing, such as when iPv6 clients on a remote link cannot contact the centralized stateful DHCPv6 server through their local router. That is a different root cause from the dhcp giaddr subnet selection fault observed at a financial services WAN in Toronto. Applying that approach alone would not establish the required result: The server issues leases from the subnet associated with the actual relay client segment.

That approach is relevant to dhcpv6 duid identity, such as when an administrator assumes DHCPv6 reservations use only a client MAC address and the intended client consistently misses its reserved lease. That is a different root cause from the dhcp giaddr subnet selection fault observed at a financial services WAN in Toronto. Applying that approach alone would not establish the required result: The server issues leases from the subnet associated with the actual relay client segment.

That observation verifies dhcp relay helper address in a different situation, such as when broadcast DHCPDISCOVER packets from remote VLAN clients never reach the central DHCP server. For the reported dhcp giaddr subnet selection incident at a financial services WAN in Toronto, the required acceptance evidence is: The server issues leases from the subnet associated with the actual relay client segment. This other result does not test that condition directly.

That observation verifies dhcpv6 duid identity in a different situation, such as when an administrator assumes DHCPv6 reservations use only a client MAC address and the intended client consistently misses its reserved lease. For the reported dhcp giaddr subnet selection incident at a financial services WAN in Toronto, the required acceptance evidence is: The server issues leases from the subnet associated with the actual relay client segment. This other result does not test that condition directly.

That observation verifies dhcp duplicate leased ip in a different situation, such as when the DHCP server offers an IPv4 address already in use and hosts report duplicate-address alerts. For the reported dhcp giaddr subnet selection incident at a financial services WAN in Toronto, the required acceptance evidence is: The server issues leases from the subnet associated with the actual relay client segment. This other result does not test that condition directly.