CCNP Enarsi Flashcards

1
Q

IPv6: RA Guard

A

Protects against rogue Router Advertisements (RA).

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2
Q

IPv6: DHCPv6 Guard

A

Protects against rogue DHCPv6 servers.

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3
Q

IPv6: Source Guard

A

Prevents IPv6 address spoofing by validating source addresses.

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4
Q

IPv6: Prefix Guard

A

Blocks the advertisement of unauthorized IPv6 prefixes.

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5
Q

IPv6: NA Guard

A

Protects against rogue Neighbor Advertisements (NA).

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6
Q

IPv4: DHCPDISCOVER

A

Sent by the client to locate available DHCP servers.

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7
Q

IPv4: DHCPOFFER

A

Sent by the DHCP server in response to a DHCPDISCOVER offering an IP lease.

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8
Q

IPv4: DHCPREQUEST

A

Sent by the client to request an offered IP or renew an existing lease.

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9
Q

DHCPACKIPv4:

A

Sent by the server to acknowledge the client’s DHCPREQUEST and finalize the IP lease.

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10
Q

IPv4: DHCPNAK

A

Sent by the server if the requested IP address is invalid or cannot be assigned.

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11
Q

IPv4: DHCPDECLINE

A

Sent by the client if the offered IP address is already in use.

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12
Q

IPv4: DHCPRELEASE

A

Sent by the client to release the assigned IP address back to the server.

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13
Q

IPv4: DHCPINFORM

A

Sent by the client to request additional configuration without obtaining an IP address.

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14
Q

IPv6: SOLICIT

A

Sent by the client to discover available DHCPv6 servers.

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15
Q

IPv6: ADVERTISE

A

Sent by the DHCPv6 server in response to a SOLICIT advertising its availability.

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16
Q

IPv6: REQUEST

A

Sent by the client to request configuration or IP from the DHCPv6 server.

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17
Q

IPv6: REPLY

A

Sent by the server in response to a REQUEST confirming the IP lease or providing configuration data.

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18
Q

IPv6: RENEW

A

Sent by the client to renew a current lease before it expires.

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19
Q

IPv6: REBIND

A

Sent by the client to extend an expiring lease if the original server is unreachable.

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20
Q

IPv6: DECLINE

A

Sent by the client to reject an IP address that is already in use.

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21
Q

IPv6: RELEASE

A

Sent by the client to release an assigned IP address.

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22
Q

IPv6: CONFIRM

A

Sent by the client to confirm the validity of a previously assigned IP address.

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23
Q

IPv6: INFORMATION-REQUEST

A

Sent by the client to request configuration information without an IP address.

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24
Q

uRPF: Strict Mode

A

Checks if the source address of the packet has a valid route through the same interface it was received on.
“ip verify unicast source reachable-via rx”

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25
Q

uRPF: Loose Mode

A

Checks if the source address has a valid route in the routing table regardless of the incoming interface.
“ip verify unicast source reachable-via any”

26
Q

uRPF: VRF Mode

A

Used in Virtual Routing and Forwarding (VRF) environments to check routes within a specific VRF instance.
“ip vrf forwarding VRF1
ip verify unicast source reachable-via rx”

27
Q

uRPF: Feasible Mode

A

Allows the packet if the source IP address has a valid route in the routing table or a feasible successor route in EIGRP.
“ip verify unicast source reachable-via rx
router eigrp 100
network 192.168.1.1”

28
Q

UDP Port: 1812

A

Default port for RADIUS authentication.

29
Q

UDP Port: 1813

A

Default port for RADIUS accounting.

30
Q

DNA Center: Overall Health Score

A

Represents the overall health of the network and devices based on various metrics.

31
Q

DNA Center: Device Health Score

A

Reflects the operational state of individual devices in the network.

32
Q

DNA Center: Application Health Score

A

Indicates the performance and availability of applications running in the network.

33
Q

DNA Center: Network Health Score

A

Measures the overall health of the network infrastructure including connectivity and performance.

34
Q

DNA Center: Wireless Health Score

A

Evaluates the performance and coverage of wireless networks including APs and clients.

35
Q

DNA Center: Client Health Score

A

Assesses the connectivity and performance of individual clients connected to the network.

36
Q

DNA Center: Security Health Score

A

Indicates the security posture of the network including compliance and threat detection.

37
Q

IPv6: Neighbor Solicitation (NS)

A

Used by a node to determine the link-layer address of a neighbor or to verify the reachability of a neighbor.

38
Q

IPv6: Neighbor Advertisement (NA)

A

Sent by a node in response to a Neighbor Solicitation or to announce its link-layer address change.

39
Q

IPv6: Router Solicitation (RS)

A

Sent by a host to discover available routers on the network.

40
Q

IPv6: Router Advertisement (RA)

A

Sent by routers to provide information about network prefixes parameters and their own link-layer addresses.

41
Q

IPv6: Redirect Message

A

Used to inform a host of a better first-hop address for a destination than the one it is currently using.

42
Q

OSPF: Backbone Area (Area 0)

A

The core area that connects all other OSPF areas.,Type 1, Type 2, Type 3, Type 4, Type 5

43
Q

OSPF: Standard Area

A

An area that can contain any type of LSA and can communicate with other areas.,Type 1, Type 2, Type 3, Type 4, Type 5

44
Q

OSPF: Stub Area

A

An area that does not receive external routes (Type 5 LSAs) and uses a default route for external networks.,Type 1, Type 2, Type 3, Type 4

45
Q

OSPF: Totally Stubby Area

A

Similar to a stub area, but does not receive summary routes (Type 3 and Type 4 LSAs) or external routes.,Type 1, Type 2

46
Q

OSPF: Not-So-Stubby Area (NSSA)

A

Allows the injection of external routes while still restricting other external route advertisements.,Type 1, Type 2, Type 3, Type 7

47
Q

LDP: Label Mapping

A

Used to associate a label with a specific FEC (Forwarding Equivalence Class) for label switching.

48
Q

LDP: Label Withdrawal

A

Sent to withdraw a previously assigned label from a specific FEC.

49
Q

LDP: Label Release

A

Used to release a label that is no longer needed typically in response to a Label Withdrawal.

50
Q

LDP: Label Request

A

Sent by a LSR (Label Switching Router) to request a label for a specific FEC from its peers.

51
Q

LDP: Label Notify

A

Used to inform a peer of a label change for a specific FEC.

52
Q

LDP: Hello

A

Used to discover and maintain neighbor relationships between LSRs.

53
Q

Log level: 0

A

(Emergency) System is unusable; indicates a serious failure.

54
Q

Log level: 1

A

(Alert)Immediate action needed; alerts that require immediate attention.

55
Q

Log level: 2

A

(Critical) Critical conditions; indicates a failure in a primary system component.

56
Q

Log level: 3

A

(Error)Error conditions; indicates an error that has occurred.

57
Q

Log level: 4

A

(Warning) Warning conditions; indicates a warning about a potential problem.

58
Q

Log level: 5

A

(Notice)Normal but significant conditions; used for important events that are not errors.

59
Q

Log level: 6

A

(Informational) Informational messages; used for normal operational messages.

60
Q

Log level: 7

A

(Debug) Debugging messages; used for diagnostic information primarily for troubleshooting.