Show:
Routing in the Distribution and Core Layers
OSPF in Multiaccess Networks
Fine-tuning OSPF Interfaces
Secure OSPF
Components of Troubleshooting Single-Area OSPF
100
Are all technologies that provide or enhance user access to network resources.
What is Switches, link aggregation, LAN redundancy and wireless LANs
100
Multiple routers interconnected in a network that does not allow broadcasts, such as Frame Relay.
What is Non-broadcast Multiaccess (NBMA)
100
Formula used to calculate the number of required adjacencies
What is n(n-1)/2
100
only form adjacencies with the DR and BDR.
What is DROTHERs
100
This is a DR or BDR router that is fully adjacent with a non-DR or BDR router.
What is FULL/DROTHER
200
They require optimal reach ability between sites.
What is Scalable networks
200
Multiple routers interconnected in a hub- and-spoke topology over an NBMA network.
What is Point-to-multipoint
200
A topology of 4 routers would result in
What is 4(4-1)/2 = 6
200
only send their LSAs to the DR and BDR using the multicast address 224.0.0.6.
What is DROTHERs
200
The router is fully adjacent with the indicated DR neighbor.
What is FULL/DR
300
is provided by routers and Layer 3 switches which operate in the distribution and core layers.
What is Remote network reachability
300
Special OSPF network used to interconnect distant OSPF areas to the backbone area.
What is Virtual links
300
is the solution to managing adjacencies and flooding of LSAs on a multiaccess network.
What is The designated router (DR)
300
uses the multicast address 224.0.0.5 to send LSAs to all other routers.
What is Designated Router
300
The router is fully adjacent with the indicated BDR neighbor.
What is FULL/BDR
400
Two routers interconnected over a common link. Often the configuration in WAN links.
What is Point-to-point
400
creating adjacencies with multiple routers would lead to an excessive number of LSAs being exchanged.
What is Creation of multiple adjacencies
400
is elected in case the DR fails.
What is The backup designated router (BDR)
400
only router flooding LSAs.
What is Designated Routers
400
The non-DR or BDR router has a neighbor adjacency with another non-DR or BDR router.
What is 2-WAY/DROTHER
500
Multiple routers interconnected over an Ethernet network.
What is Broadcast Multiaccess
500
Link-state routers flood the network when OSPF is initialized or when there is a change.
What is Extensive flooding of LSAs
500
All other non-DR and non-BDR routers become
What is DROTHERs.
500
Elections only necessary on multiaccess networks.
What is DR/BDR
500
both of their intervals must match, or a neighbor adjacency will not occur.
What is OSPF Hello and Dead