M1-2 (Single-Area OSPFv2 and Configurations) Flashcards
reviewer
What OSPF component is associated with the neighbor table?
Adjacency Database
What OSPF component is responsible for computing the cost of each route?
Dijkstra Algorithm
What OSPF components is associated with the topology table?
Link-State Database
What OSPF components is associated with the routing table?
Forwarding Database
What is the correct order in the steps for Link-State operation? Piece it together
Establishing Neighbor Adjacencies
Choose the Best Route
Execute the SPF Algorithm
Build the Topology Table
Exchange Link-State Advertisements
Establishing Neighbor Adjencies -> Exchange Link-State Advertisements -> Building the Topology Table -> Execute the SPF Algorithm -> Choose the Best Route
What OSPF packet is responsible for establishing and maintaining adjaceny with other OSPF routers?
Type 1: Hello Packet
Type 2: DBD Packet
Type 3: LSR Packet
Type 4: LSU Packet
Type 5: LSAck Packet
Type 1: Hello Packet
What OSPF packet contains an abbreviated list of the LSDB of the sending router?
Type 1: Hello Packet
Type 2: DBD Packet
Type 3: LSR Packet
Type 4: LSU Packet
Type 5: LSAck Packet
Type 2: DBD Packet (Database Description)
OSPF packet is used by routers to announce new information?
Type 1: Hello Packet
Type 2: DBD Packet
Type 3: LSR Packet
Type 4: LSU Packet
Type 5: LSAck Packet
Type 4: LSU Packet (Link-State Update)
What OSPF packet is used by routers to request more information?
Type 1: Hello Packet
Type 2: DBD Packet
Type 3: LSR Packet
Type 4: LSU Packet
Type 5: LSAck Packet
Type 3: LSR Packet (Link-State Request)
It is used to confirm receipt of an LSA?
Type 1: Hello Packet
Type 2: DBD Packet
Type 3: LSR Packet
Type 4: LSU Packet
Type 5: LSAck Packet
Type 5: LSAck Packet (Link-State Acknowledgement)
During this OSPF state on multiaccess networks, the routers elect a Designated Router (DR) and a Backup Designated Router (BDR).
Two-Way State
This OSPF state, routers send each other DBD packets.
Exchange State
An OSPF router enters this state when it has received a Hello packet from a neighbor, containing the sending Router ID.
Init State
During this OSPF state on point-to-point networks, the routers decide which router initiates the exchange of DBD packets.
ExStart State
In this OSPF state, routers have convered link-state database.
Full State
During this OSPF state, no Hello packets are received.
Down State
This OSPF state, routers are processed using the SPF algorithm
Full State
What function of OSPF hello packets?
To send specifically requested link-state records
To discover neighobrs and build adjacencies between them
To ensure database synchronization between routers
To request specific link-state records from neighbor routers
To discover neighbors and build adjancies between them
This OSPF packet contains the different types of link-state advertisements?
LSU Packet (Link-State Update)
What describe features of the OSPF topology table? (Choose three answers.)
It is a link-state database that reprensets the network topology.
Its concecnts are the result of running the SPF algorithm.
When converged, all routers in an area have identical topology tables.
The topology tables contains feasible succecssor routes.
The table can be viewed via the show ip ospf database command.
After convergence, the table only contains the lowest cost route entries for all known networks.
It is a link-state database that reprents the network topology.
When converged, all routers in an area have identical topology tables.
The table can be viewed via the show ip ospf database command.
What does an OSPF area contain?
routers that share the same process ID
routers that share the same router ID
routers that have the same link-state information in their LSDBs
routers whose SPF trees are identical
Routers that have the same link-state information in their LSDBs
A router is participating in an OSPFv2 domain. What will always happen if the dead interval expires before the router receives a hello packet from an adjacent DROTHER OSPF router?
A new Dead interval timer of four times the Hello interval will start
OSPF will remove that neighbor from the router’s link-state database
OSPF will run a new DR/BDR election
SPF will run and determine which neighbor router is down.
OSPF will remove that neighbor from the router link-state database.
What is the correct order of packet types used by an OSPF router to establish convergence? Piece it together.
Hello
LSAck
DBD
LSR
LSU
Hello, DBD, LSR, LSU, LSAck
What is the feature of the OSPF routing protocol?
OSPF authentication is configured in the sme way on IPv4 and IPv6 networks.
Routers can be grouped into autonomous systems to support a hierarchical system.
It scales well in both small and large networks.
The SPF algorithm chooses the best path based on 30-second updates.
It scales well in both small and large networks.