3881323
Pregunta 1
Pregunta
Which LSA sends out information about known networks in an area?
Respuesta
-
Type 1 Router LSA
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Type 2 Network LSA
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Type 3 Summary LSA
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Type 4 ASBR Summary LSA
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Type 5 Autonomous system external LSA
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Type 7 NSSA LSA
Pregunta 2
Pregunta
What option matches the type 2 LSA?
Respuesta
-
The type 2 LSA is used for DR/BDR to let them know which routers belong to the multi-access network.
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The type 2 LSA is used to propagate the "tree" for each router in an area.
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The type 2 LSA is only used in PPP-network types when DR and BDR is not used.
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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.
Pregunta 3
Pregunta
What characteristics corresponds with the type 3 LSA?
Respuesta
-
Type 3 LSA is only propagated inside an area.
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Type 3 LSA's are created from internal routers.
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Type 3 LSA's needs an ASBR.
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Type 3 LSA's needs an ABR.
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Type 3 LSA's is only propagated between areas.
Pregunta 4
Pregunta
The type 4 LSA contains information about?
Respuesta
-
The router ID of the DR.
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How to reach the ABR.
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How to reach a specific area.
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How to reach the ASBR.
Pregunta 5
Pregunta
What routes-type sends out type 5 LSA for what purpose?
Respuesta
-
ASBR sends out type 5 LSA to let other areas know how to reach it.
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ASBR sends out type 5 LSA with summary information between areas.
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ABR sends out type 5 LSA with external summary information between areas.
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DR sends out type 5 LSA to propagate the multi-access segment with prefixes to other networks.
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ASBR sends out type 5 LSA with summary information to other networks outside the OSPF-domain.
Pregunta 6
Pregunta
What is the purpose of the type 7 LSA?
Respuesta
-
The type 7 LSA is used to propagate redistributed networks into Not-so-stubby-areas.
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The type 7 LSA is used instead of type 3 LSA's that are blocked in totally stubby areas.
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The type 7 LSA is exactly the same as the type 5 LSA.
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The type 7 LSA carries information about external networks.
Pregunta 7
Pregunta
Stub areas allow type 5 LSA's.
Respuesta
- True
- False
Pregunta 8
Pregunta
Stub areas allow type 3 LSA.
Respuesta
- True
- False
Pregunta 9
Pregunta
The AS summary LSA is created by the?
Respuesta
-
DR
-
ABR
-
ASBR
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Backbone Router
Pregunta 10
Pregunta
What is the type 8 LSA called?
Respuesta
-
Link LSA
-
Intra-area prefix LSA
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Inter-area prefix LSA
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Link-local LSA
Pregunta 11
Pregunta
The type 9 LSA is used for what?
Respuesta
-
The intra-area prefix LSA is the same as the type 1 and 2 LSA in OSPFv2.
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The inter-area prefix LSA is the same as the type 1 and 2 LSA in OSPFv2.
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The intra-area prefix is used to summarize networks between areas.
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The inter-area prefix is used to summarize networks between areas.
Pregunta 12
Pregunta
Which LSA types are renamed in OSPFv3?
Respuesta
-
Router LSA
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Summary LSA
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Network LSA
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ASBR summary LSA
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AS LSA
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Type 7 LSA
Pregunta 13
Pregunta
OSPFv3 supports only IPv4
Respuesta
- True
- False
Pregunta 14
Pregunta
OSPF supports what types of authentication?
Respuesta
-
MD5
-
Plain text
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SHA
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Timed based MD5
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Shared secret
Pregunta 15
Pregunta
Virtual link can be configured over stub areas.
Respuesta
- True
- False
Pregunta 16
Pregunta
To configure route summarization in OSPF, which command is used?
Respuesta
-
Area range
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Summary-address
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default-information originate
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Auto-summary enable
Pregunta 17
Pregunta
How do you inject a default-route into OSPF?
Respuesta
-
Use the default-route command in router-configuration mode.
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Create a static default-route and use the redistribute command.
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Use the default-information originate command.
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Use the default-information originate always command.
Pregunta 18
Pregunta
Where is priority used in OSPF?
Respuesta
-
In the election of master and slave when database description packets are exchanged.
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The calculation of shortest path.
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The election of DR and BDR
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In the creation of stub areas where priority 0 is used to flag an area as stub.
Pregunta 19
Pregunta
What is a Database descriptor packet?
Respuesta
-
A database descriptor packet is another name for hello-packets which keeps the databases synchronized across all routers in an area.
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It's used to compare the LSDB between routers in an area to see if more link-state Query packets need to be sent.
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It describes the database of the router, what RID, prefix and if it's a DR or BDR.
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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.
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