Exam Bundle

That observation verifies acl applied wrong direction in a different situation, such as when an extended IPv4 ACL correctly describes unwanted inbound traffic but was attached outbound on the wrong router interface. For the reported urpf strict asymmetric routes incident at a telecommunications branch in Oslo, the required acceptance evidence is: Valid asymmetric traffic passes under approved controls while spoofed source packets remain rejected. This other result does not test that condition directly.

That observation verifies urpf loose reachability in a different situation, such as when loose uRPF is installed on an edge and administrators assume it verifies incoming interface symmetry. For the reported urpf strict asymmetric routes incident at a telecommunications branch in Oslo, the required acceptance evidence is: Valid asymmetric traffic passes under approved controls while spoofed source packets remain rejected. This other result does not test that condition directly.

That observation verifies acl implicit deny in a different situation, such as when a router ACL was built with one permit line and unexpectedly blocks all other traffic. For the reported urpf strict asymmetric routes incident at a telecommunications branch in Oslo, the required acceptance evidence is: Valid asymmetric traffic passes under approved controls while spoofed source packets remain rejected. This other result does not test that condition directly.

That approach is relevant to ssh rsa key prerequisites, such as when a router cannot start the SSH service because it lacks an appropriate host key and required IOS SSH configuration. That is a different root cause from the vty login local fault observed at a university IT network in Edinburgh. Applying that approach alone would not establish the required result: An authorized local account authenticates through SSH with the correct privilege and access controls.

That approach is relevant to ssh transport restriction, such as when a VTY line allows Telnet login even though the management policy requires encrypted CLI access. That is a different root cause from the vty login local fault observed at a university IT network in Edinburgh. Applying that approach alone would not establish the required result: An authorized local account authenticates through SSH with the correct privilege and access controls.

That approach is relevant to vty access-class management acl, such as when untrusted subnets can open the router's SSH port even though the routing interfaces have unrelated ACLs. That is a different root cause from the vty login local fault observed at a university IT network in Edinburgh. Applying that approach alone would not establish the required result: An authorized local account authenticates through SSH with the correct privilege and access controls.

That observation verifies scp file transfer enablement in a different situation, such as when an operator tries to securely copy router files using SCP but the device is configured only for unencrypted TFTP. For the reported vty login local incident at a university IT network in Edinburgh, the required acceptance evidence is: An authorized local account authenticates through SSH with the correct privilege and access controls. This other result does not test that condition directly.

That observation verifies ssh rsa key prerequisites in a different situation, such as when a router cannot start the SSH service because it lacks an appropriate host key and required IOS SSH configuration. For the reported vty login local incident at a university IT network in Edinburgh, the required acceptance evidence is: An authorized local account authenticates through SSH with the correct privilege and access controls. This other result does not test that condition directly.

That observation verifies console versus vty recovery in a different situation, such as when wAN routing is down and engineers try to troubleshoot using remote VTY login without a console or out-of-band plan. For the reported vty login local incident at a university IT network in Edinburgh, the required acceptance evidence is: An authorized local account authenticates through SSH with the correct privilege and access controls. This other result does not test that condition directly.

That approach is relevant to eigrp stub leaf, such as when a remote branch does not transit traffic yet its router receives network-wide EIGRP query requests for unrelated destinations. That is a different root cause from the eigrp authentication key fault observed at a bank network operations team in London. Applying that approach alone would not establish the required result: The authenticated EIGRP neighbor is established without disabling security.

That approach is relevant to eigrp ipv6 address family, such as when iPv4 EIGRP is healthy but IPv6 routes are absent because the appropriate IPv6 routing address family was never activated. That is a different root cause from the eigrp authentication key fault observed at a bank network operations team in London. Applying that approach alone would not establish the required result: The authenticated EIGRP neighbor is established without disabling security.

That approach is relevant to eigrp k-value disagreement, such as when eIGRP hello packets arrive but routers refuse adjacency because composite-metric K values do not agree. That is a different root cause from the eigrp authentication key fault observed at a bank network operations team in London. Applying that approach alone would not establish the required result: The authenticated EIGRP neighbor is established without disabling security.

That observation verifies eigrp delay/bandwidth metric in a different situation, such as when an interface's documented bandwidth differs from its configured EIGRP bandwidth and delay inputs, creating unexpected path costs. For the reported eigrp authentication key incident at a bank network operations team in London, the required acceptance evidence is: The authenticated EIGRP neighbor is established without disabling security. This other result does not test that condition directly.

That observation verifies eigrp named mode af-interface in a different situation, such as when a named EIGRP configuration has the correct AS but an interface is not participating in its address family. For the reported eigrp authentication key incident at a bank network operations team in London, the required acceptance evidence is: The authenticated EIGRP neighbor is established without disabling security. This other result does not test that condition directly.

That observation verifies eigrp asn mismatch in a different situation, such as when directly connected routers exchange IP packets but EIGRP neighborship never forms because their autonomous-system numbers differ. For the reported eigrp authentication key incident at a bank network operations team in London, the required acceptance evidence is: The authenticated EIGRP neighbor is established without disabling security. This other result does not test that condition directly.

That approach is relevant to phase 2 hub split horizon, such as when in a phase 2 EIGRP DMVPN design, one spoke's learned LAN prefix never reaches other spokes because hub split horizon blocks reflection. That is a different root cause from the eigrp dmvpn peer issue fault observed at a remote clinic network in Melbourne. Applying that approach alone would not establish the required result: Expected dynamic-routing adjacencies form over protected tunnel paths.

That approach is relevant to hub dynamic multicast mappings, such as when a DMVPN hub sees NHRP registrations but no EIGRP neighbors because tunneled multicast control packets cannot reach newly joined spokes. That is a different root cause from the eigrp dmvpn peer issue fault observed at a remote clinic network in Melbourne. Applying that approach alone would not establish the required result: Expected dynamic-routing adjacencies form over protected tunnel paths.

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 eigrp dmvpn peer issue fault observed at a remote clinic network in Melbourne. Applying that approach alone would not establish the required result: Expected dynamic-routing adjacencies form over protected tunnel paths.

That observation verifies dmvpn tunnel key inconsistency in a different situation, such as when gRE-encapsulated packets are rejected because the DMVPN endpoints use incompatible tunnel key settings. For the reported eigrp dmvpn peer issue incident at a remote clinic network in Melbourne, the required acceptance evidence is: Expected dynamic-routing adjacencies form over protected tunnel paths. This other result does not test that condition directly.

That observation verifies dmvpn mgre hub in a different situation, 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. For the reported eigrp dmvpn peer issue incident at a remote clinic network in Melbourne, the required acceptance evidence is: Expected dynamic-routing adjacencies form over protected tunnel paths. This other result does not test that condition directly.

That observation verifies nhrp cache verification in a different situation, such as when a direct spoke route exists but its tunnel next hop lacks a corresponding NHRP resolution entry. For the reported eigrp dmvpn peer issue incident at a remote clinic network in Melbourne, the required acceptance evidence is: Expected dynamic-routing adjacencies form over protected tunnel paths. This other result does not test that condition directly.

That approach is relevant to syslog severity threshold, such as when informational interface events never reach syslog because the configured logging trap level captures only severe messages. That is a different root cause from the logging buffer too small fault observed at a city service network in Singapore. Applying that approach alone would not establish the required result: Incident events are retained long enough for diagnosis and archived centrally.

That approach is relevant to syslog remote destination, such as when a router logs events locally but nothing reaches the central collector because logging host was never configured. That is a different root cause from the logging buffer too small fault observed at a city service network in Singapore. Applying that approach alone would not establish the required result: Incident events are retained long enough for diagnosis and archived centrally.

That approach is relevant to syslog transport acl, such as when local logs are correct but the central UDP syslog collector never sees packets due to the WAN filtering policy. That is a different root cause from the logging buffer too small fault observed at a city service network in Singapore. Applying that approach alone would not establish the required result: Incident events are retained long enough for diagnosis and archived centrally.

That observation verifies log timestamps absent in a different situation, such as when two routers' syslog events cannot be ordered during a reconvergence incident because device log messages have no accurate timestamps. For the reported logging buffer too small incident at a city service network in Singapore, the required acceptance evidence is: Incident events are retained long enough for diagnosis and archived centrally. This other result does not test that condition directly.

That observation verifies syslog severity threshold in a different situation, such as when informational interface events never reach syslog because the configured logging trap level captures only severe messages. For the reported logging buffer too small incident at a city service network in Singapore, the required acceptance evidence is: Incident events are retained long enough for diagnosis and archived centrally. This other result does not test that condition directly.

That observation verifies syslog remote destination in a different situation, such as when a router logs events locally but nothing reaches the central collector because logging host was never configured. For the reported logging buffer too small incident at a city service network in Singapore, the required acceptance evidence is: Incident events are retained long enough for diagnosis and archived centrally. This other result does not test that condition directly.

That approach is relevant to acl first-match ordering, such as when a broad permit appears before a targeted deny, so traffic to a prohibited TCP port passes. That is a different root cause from the ipv6 nd permitted behavior fault observed at a finance network core in Zurich. Applying that approach alone would not establish the required result: Neighbor solicitation and advertisement function while prohibited IPv6 data traffic is still blocked.

That approach is relevant to acl implicit deny, such as when a router ACL was built with one permit line and unexpectedly blocks all other traffic. That is a different root cause from the ipv6 nd permitted behavior fault observed at a finance network core in Zurich. Applying that approach alone would not establish the required result: Neighbor solicitation and advertisement function while prohibited IPv6 data traffic is still blocked.

That approach is relevant to acl logging load, such as when a deny any log is placed on a high-rate WAN ACL and produces excessive CPU and syslog pressure. That is a different root cause from the ipv6 nd permitted behavior fault observed at a finance network core in Zurich. Applying that approach alone would not establish the required result: Neighbor solicitation and advertisement function while prohibited IPv6 data traffic is still blocked.

That observation verifies acl applied wrong direction in a different situation, such as when an extended IPv4 ACL correctly describes unwanted inbound traffic but was attached outbound on the wrong router interface. For the reported ipv6 nd permitted behavior incident at a finance network core in Zurich, the required acceptance evidence is: Neighbor solicitation and advertisement function while prohibited IPv6 data traffic is still blocked. This other result does not test that condition directly.

That observation verifies router control-plane versus interface acl in a different situation, such as when an engineer relies on a transit ACL to protect all router CPU services even though router-destined flows use different paths. For the reported ipv6 nd permitted behavior incident at a finance network core in Zurich, the required acceptance evidence is: Neighbor solicitation and advertisement function while prohibited IPv6 data traffic is still blocked. This other result does not test that condition directly.

That observation verifies acl implicit deny in a different situation, such as when a router ACL was built with one permit line and unexpectedly blocks all other traffic. For the reported ipv6 nd permitted behavior incident at a finance network core in Zurich, the required acceptance evidence is: Neighbor solicitation and advertisement function while prohibited IPv6 data traffic is still blocked. This other result does not test that condition directly.