The neighbor ' s link-state database has newer information than what it received in the update.

The neighbor sends the update as an acknowledgement.

The neighbor ' s update indicates that it has run out of space in its LSDB.

The neighbor ' s update indicates that the sequence number received is the same as the one already in its link-state database.

Router R6 will have a single Router LSA that describes the summary prefix.

Router R6 will have three Router LSAs - one to describe each loopback prefix.

Router R6 will have a single Inter-Area Prefix LSA to describe the summary prefix.

Router R6 will have three Inter-Area Prefix LSAs - one to describe each loopback prefix.

Router R6 will not have any LSAs to describe the loopback prefix or the summarized prefix.

2

3

4

5

6

7

Backbone

NSSA

Stub

Totally stubby

When link-state information reaches the maximum age on a router, the router will flood that information to its neighbors.

When a router detects that any of its link-state information has reached the maximum age, it will request a new update from the source router.

Aging helps ensure that links, which are no longer part of the topology, will eventually get removed from the LSDB.

The age value is updated as the information is flooded throughout the network and when it is in the LSDB.

Hello

Link-state request

Link-state acknowledgment

Link-state update

Database description

To give IPv6 traffic preferential routing over IPv4 routes.

To allow core routers running only IPv6 protocols to carry IPv4 traffic.

To give IPv4 only routers the ability to route based on IPv6 addresses.

To allow IPv6 traffic to pass through an IPv4 network.

The router has a system interface, one point-to-point interface and one virtual link.

The router has a system interface, one passive interface, one point-to-point interface and one virtual link.

The router has a system interface, one point-to-point interface and one broadcast interface.

The router has a system interface, one passive interface, one point-to-point interface and one broadcast interface.

There are five broadcast links and there are no point-to-point links.

There are five broadcast links and there are five point-to-point links.

There are five broadcast links. It ' s not possible to say how many point-to-point links there are.

It ' s not possible to say how many broadcast or point-to-point links there are.

Router R1 generates a Type 5 LSA that is flooded to area 1 only.

Router R1 generates a Type 5 LSA that is flooded to areas 1 and 0. Router R6 generates a Type 5 LSA that is flooded to area 2.

Router R1 generates a Type 5 LSA that is flooded to areas 0.1, and 2.

Router R3 generates a Type 5 LSA that is flooded to areas 0 and 2

Type 5 LSAs are not generated in this network topology.

The MTU does not match on both interfaces.

OSPF is not enabled on one of the routers.

The router ID is the same on both routers.

An OSPF Hello has not been received from the neighbor.

The interfaces are configured as point-to-point on one side and broadcast on the other.

Router R2 has two IS-IS-adjacencies and two LSPs.

Router R2 has two IS-IS-adjacencies and four LSPs.

Router R2 has two IS-IS-adjacencies and three LSPs.

Router R2 has four IS-IS-adjacencies and six LSPs.

CSPF must be enabled at head-end on fast reroute protected loose path LSPs

Fast reroute must first be enabled on the downstream routers.

CSPF must be enabled on all downstream loose hop routers.

Global revertive path optimization must be enabled so the path will be re-optimized around a failed node.

The penultimate router will POP the top label from the packets.

The eLER will receive packets with a top label value of 3.

The eLER will receive packets with a top label value of 0.

The penultimate router will always receive unlabeled packets.

The penultimate router performs a double lookup on the packet.

Ordered control mode; downstream on demand.

Ordered control mode; downstream unsolicited.

Independent control mode; downstream on demand.

Independent control mode; downstream unsolicited.

A mechanism that implements opaque LSAs.

A mechanism that computes routes based on defined user requirements.

A mechanism that allows the IGP shortest path to be used.

A mechanism that allows RSVP or LDP signaling to use a route other than the IGP best route to establish a LSP.

It supports IGP-based LSPs.

It supports constrained path LSPs.

It does not support loose explicit path LSPs.

It is recommended for use in Traffic Engineering applications.

It cannot be used with facility backup fast reroute.

The area addresses TLV

The intermediate system neighbors TLV

The IP interface address TLV

The authentication information TLV

They are explicitly acknowledged by sending a CSNP to the sender identifying the LSP.

They are implicitly acknowledged as a part of the link-state database synchronization and maintenance procedures.

They are explicitly acknowledged by sending a PSNP to the sender identifying the LSP.

They are implicitly acknowledged by the DIS multicast of CSNPs.

Routers R1 and R2 are L2 routers. Routers R3 and R4 are L1/L2 routers.

Routers R1, R2, and R4 are L1/L2 routers Router R3 is an L1 router.

Routers R1, R2, and R3 are L2 routers. Router R4 is an L1 router.

Routers R1 and R2 are L1/L2 routers. Routers R3 and R4 are L1 routers.