Which LSA sends out information about known networks in an area?
Type 1 Router LSA
Type 2 Network LSA
Type 3 Summary LSA
Type 4 ASBR Summary LSA
Type 5 Autonomous system external LSA
Type 7 NSSA LSA
What option matches the type 2 LSA?
The type 2 LSA is used for DR/BDR to let them know which routers belong to the multi-access network.
The type 2 LSA is used to propagate the "tree" for each router in an area.
The type 2 LSA is only used in PPP-network types when DR and BDR is not used.
The type 2 LSA is used by the DR/BDR to tell the other routers in a segment which prefix they belong to and who the DR/BDR are.
What characteristics corresponds with the type 3 LSA?
Type 3 LSA is only propagated inside an area.
Type 3 LSA's are created from internal routers.
Type 3 LSA's needs an ASBR.
Type 3 LSA's needs an ABR.
Type 3 LSA's is only propagated between areas.
The type 4 LSA contains information about?
The router ID of the DR.
How to reach the ABR.
How to reach a specific area.
How to reach the ASBR.
What routes-type sends out type 5 LSA for what purpose?
ASBR sends out type 5 LSA to let other areas know how to reach it.
ASBR sends out type 5 LSA with summary information between areas.
ABR sends out type 5 LSA with external summary information between areas.
DR sends out type 5 LSA to propagate the multi-access segment with prefixes to other networks.
ASBR sends out type 5 LSA with summary information to other networks outside the OSPF-domain.
What is the purpose of the type 7 LSA?
The type 7 LSA is used to propagate redistributed networks into Not-so-stubby-areas.
The type 7 LSA is used instead of type 3 LSA's that are blocked in totally stubby areas.
The type 7 LSA is exactly the same as the type 5 LSA.
The type 7 LSA carries information about external networks.
Stub areas allow type 5 LSA's.
Stub areas allow type 3 LSA.
The AS summary LSA is created by the?
DR
ABR
ASBR
Backbone Router
What is the type 8 LSA called?
Link LSA
Intra-area prefix LSA
Inter-area prefix LSA
Link-local LSA
The type 9 LSA is used for what?
The intra-area prefix LSA is the same as the type 1 and 2 LSA in OSPFv2.
The inter-area prefix LSA is the same as the type 1 and 2 LSA in OSPFv2.
The intra-area prefix is used to summarize networks between areas.
The inter-area prefix is used to summarize networks between areas.
Which LSA types are renamed in OSPFv3?
Router LSA
Summary LSA
Network LSA
ASBR summary LSA
AS LSA
Type 7 LSA
OSPFv3 supports only IPv4
OSPF supports what types of authentication?
MD5
Plain text
SHA
Timed based MD5
Shared secret
Virtual link can be configured over stub areas.
To configure route summarization in OSPF, which command is used?
Area range
Summary-address
default-information originate
Auto-summary enable
How do you inject a default-route into OSPF?
Use the default-route command in router-configuration mode.
Create a static default-route and use the redistribute command.
Use the default-information originate command.
Use the default-information originate always command.
Where is priority used in OSPF?
In the election of master and slave when database description packets are exchanged.
The calculation of shortest path.
The election of DR and BDR
In the creation of stub areas where priority 0 is used to flag an area as stub.
What is a Database descriptor packet?
A database descriptor packet is another name for hello-packets which keeps the databases synchronized across all routers in an area.
It's used to compare the LSDB between routers in an area to see if more link-state Query packets need to be sent.
It describes the database of the router, what RID, prefix and if it's a DR or BDR.
it compares the LSDB of the routers participating in order to see what is missing in each database to get a fully synchronized topology of the area.
