Exam Bundle

That observation verifies dhcpv6 rogue server in a different situation, such as when a malicious access client sends DHCPv6 server responses that assign incorrect network parameters to hosts. For the reported ndp duplicate address detect incident at a health system WAN in Toronto, the required acceptance evidence is: The host completes duplicate address detection and assigns an available IPv6 address. This other result does not test that condition directly.

That observation verifies ipv6 nd spoofing in a different situation, such as when an attacker injects forged Neighbor Advertisements to redirect local IPv6 traffic. For the reported ndp duplicate address detect incident at a health system WAN in Toronto, the required acceptance evidence is: The host completes duplicate address detection and assigns an available IPv6 address. This other result does not test that condition directly.

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 ndp duplicate address detect incident at a health system WAN in Toronto, the required acceptance evidence is: The host completes duplicate address detection and assigns an available IPv6 address. This other result does not test that condition directly.

That approach is relevant to ospf area mismatch, such as when two OSPF routers on one link receive hellos but use different area identifiers, preventing adjacency. That is a different root cause from the ospf exstart mtu fault observed at a multinational data center in Frankfurt. Applying that approach alone would not establish the required result: The neighbor advances to Full and LSDB exchange completes with consistent interface MTUs.

That approach is relevant to ospf dr bdr network type, such as when a point-to-point link is configured with an OSPF broadcast network type and displays an unnecessary DR election. That is a different root cause from the ospf exstart mtu fault observed at a multinational data center in Frankfurt. Applying that approach alone would not establish the required result: The neighbor advances to Full and LSDB exchange completes with consistent interface MTUs.

That approach is relevant to ospf e1 e2 route preference, such as when two otherwise valid OSPF external alternatives are compared without considering their E1 and E2 metric semantics. That is a different root cause from the ospf exstart mtu fault observed at a multinational data center in Frankfurt. Applying that approach alone would not establish the required result: The neighbor advances to Full and LSDB exchange completes with consistent interface MTUs.

That observation verifies ospf backbone connectivity in a different situation, such as when an ABR connects two nonbackbone areas without an Area 0 backbone path, and interarea advertisements are missing. For the reported ospf exstart mtu incident at a multinational data center in Frankfurt, the required acceptance evidence is: The neighbor advances to Full and LSDB exchange completes with consistent interface MTUs. This other result does not test that condition directly.

That observation verifies ospf dr bdr network type in a different situation, such as when a point-to-point link is configured with an OSPF broadcast network type and displays an unnecessary DR election. For the reported ospf exstart mtu incident at a multinational data center in Frankfurt, the required acceptance evidence is: The neighbor advances to Full and LSDB exchange completes with consistent interface MTUs. This other result does not test that condition directly.

That observation verifies ospf virtual link transit in a different situation, such as when an attempted virtual link traverses a stub transit area, causing backbone repair to fail. For the reported ospf exstart mtu incident at a multinational data center in Frankfurt, the required acceptance evidence is: The neighbor advances to Full and LSDB exchange completes with consistent interface MTUs. This other result does not test that condition directly.

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 managed WAN provider in Amsterdam. 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 managed WAN provider in Amsterdam. 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 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 managed WAN provider in Amsterdam. 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 managed WAN provider in Amsterdam, 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 managed WAN provider in Amsterdam, 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 managed WAN provider in Amsterdam, 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 approach is relevant to ipv6 nd trust validation, such as when a first-hop protection policy is copied from a different VLAN and treats all access ports as trusted for neighbor discovery. That is a different root cause from the ndp duplicate address detect fault observed at a regional data center in Dallas. Applying that approach alone would not establish the required result: The host completes duplicate address detection and assigns an available IPv6 address.

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 ndp duplicate address detect fault observed at a regional data center in Dallas. Applying that approach alone would not establish the required result: The host completes duplicate address detection and assigns an available IPv6 address.

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 ndp duplicate address detect fault observed at a regional data center in Dallas. Applying that approach alone would not establish the required result: The host completes duplicate address detection and assigns an available IPv6 address.

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 ndp duplicate address detect incident at a regional data center in Dallas, the required acceptance evidence is: The host completes duplicate address detection and assigns an available IPv6 address. This other result does not test that condition directly.

That observation verifies dhcpv6 rogue server in a different situation, such as when a malicious access client sends DHCPv6 server responses that assign incorrect network parameters to hosts. For the reported ndp duplicate address detect incident at a regional data center in Dallas, the required acceptance evidence is: The host completes duplicate address detection and assigns an available IPv6 address. This other result does not test that condition directly.

That observation verifies ipv6 nd spoofing in a different situation, such as when an attacker injects forged Neighbor Advertisements to redirect local IPv6 traffic. For the reported ndp duplicate address detect incident at a regional data center in Dallas, the required acceptance evidence is: The host completes duplicate address detection and assigns an available IPv6 address. This other result does not test that condition directly.

That approach is relevant to vpnv4 bgp family, such as when pE loopback BGP peers are Established for ordinary IPv4 unicast but customer VPN prefixes are absent. That is a different root cause from the vpn connectivity asymmetric fault observed at an airline WAN in London. Applying that approach alone would not establish the required result: Both sites contain authorized forward and return routes within the same VPN.

That approach is relevant to pe core versus customer forwarding, such as when a P router in the MPLS core is expected to contain every customer IPv4 prefix to forward VPN traffic. That is a different root cause from the vpn connectivity asymmetric fault observed at an airline WAN in London. Applying that approach alone would not establish the required result: Both sites contain authorized forward and return routes within the same VPN.

That approach is relevant to route-target import missing, such as when the remote PE receives a VPNv4 route but the destination tenant VRF does not import it because RT values do not match. That is a different root cause from the vpn connectivity asymmetric fault observed at an airline WAN in London. Applying that approach alone would not establish the required result: Both sites contain authorized forward and return routes within the same VPN.

That observation verifies route distinguisher overlapping tenants in a different situation, such as when two customers both advertise 10.10.0.0/16 and the operator assumes ordinary IPv4 BGP can carry them without unique VPN identity. For the reported vpn connectivity asymmetric incident at an airline WAN in London, the required acceptance evidence is: Both sites contain authorized forward and return routes within the same VPN. This other result does not test that condition directly.

That observation verifies pe core versus customer forwarding in a different situation, such as when a P router in the MPLS core is expected to contain every customer IPv4 prefix to forward VPN traffic. For the reported vpn connectivity asymmetric incident at an airline WAN in London, the required acceptance evidence is: Both sites contain authorized forward and return routes within the same VPN. This other result does not test that condition directly.

That observation verifies bgp extended community transmission in a different situation, such as when a VPNv4 prefix reaches a PE without its RT extended community, so import policy cannot identify the target VPN. For the reported vpn connectivity asymmetric incident at an airline WAN in London, the required acceptance evidence is: Both sites contain authorized forward and return routes within the same VPN. This other result does not test that condition directly.

That approach is relevant to mutual redistribution metric integrity, such as when bGP-origin routes entering EIGRP are given arbitrary seed metrics that make a slow backup path appear better than intended. That is a different root cause from the ospf e1 versus e2 metric type fault observed at a distribution company in Oslo. Applying that approach alone would not establish the required result: External type 1 route cost reflects both the external metric and intra-OSPF distance to the ASBR.

That approach is relevant to ospf external subnets redistribution, such as when a redistribution statement is intended to carry multiple classless subnets into OSPF but only classful behavior is observed in the configured IOS context. That is a different root cause from the ospf e1 versus e2 metric type fault observed at a distribution company in Oslo. Applying that approach alone would not establish the required result: External type 1 route cost reflects both the external metric and intra-OSPF distance to the ASBR.

That approach is relevant to connected route redistribution oversight, such as when an attached transit network is mistakenly redistributed into an IGP intended only to carry service prefixes. That is a different root cause from the ospf e1 versus e2 metric type fault observed at a distribution company in Oslo. Applying that approach alone would not establish the required result: External type 1 route cost reflects both the external metric and intra-OSPF distance to the ASBR.

That observation verifies ospf external subnets redistribution in a different situation, such as when a redistribution statement is intended to carry multiple classless subnets into OSPF but only classful behavior is observed in the configured IOS context. For the reported ospf e1 versus e2 metric type incident at a distribution company in Oslo, the required acceptance evidence is: External type 1 route cost reflects both the external metric and intra-OSPF distance to the ASBR. This other result does not test that condition directly.

That observation verifies redistribution route-map omission in a different situation, such as when a router leaks sensitive static prefixes into OSPF because redistribute static has no route policy. For the reported ospf e1 versus e2 metric type incident at a distribution company in Oslo, the required acceptance evidence is: External type 1 route cost reflects both the external metric and intra-OSPF distance to the ASBR. This other result does not test that condition directly.

That observation verifies ospf default originate conditional in a different situation, such as when the border router should originate an OSPF default only while it has a usable upstream default but neighbors receive none. For the reported ospf e1 versus e2 metric type incident at a distribution company in Oslo, the required acceptance evidence is: External type 1 route cost reflects both the external metric and intra-OSPF distance to the ASBR. This other result does not test that condition directly.