CCNA 3 v7 Modules 1 – 2 OSPF
Concepts and Configuration
Exam Answers
What is a function of OSPF hello packets? - 🧠 ANSWER ✔✔to discover
neighbors and build adjacencies between them
Which OPSF packet contains the different types of link-state
advertisements? - 🧠 ANSWER ✔✔LSU
Which statements describe features of the OSPF topology table? (Choose
three.) - 🧠 ANSWER ✔✔1.) The table can be viewed via the show ip ospf
database command.
,2.) It is a link-state database that represents the network topology.
3.) When converged, all routers in an area have identical topology tables.
What does an OSPF area contain? - 🧠 ANSWER ✔✔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? - 🧠 ANSWER ✔✔OSPF will remove that
neighbor from the router link-state database.
What is the order of packet types used by an OSPF router to establish
convergence? - 🧠 ANSWER ✔✔Hello, DBD, LSR, LSU, LSAck
What is a feature of the OSPF routing protocol? - 🧠 ANSWER ✔✔It scales
well in both small and large networks.
What is used to create the OSPF neighbor table? - 🧠 ANSWER
✔✔adjacency database
What is identical on all OSPF routers within a single area? - 🧠 ANSWER
✔✔link-state database
, What function is performed by the OSPF designated router? - 🧠 ANSWER
✔✔dissemination of LSAs
What are two reasons for creating an OSPF network with multiple areas?
(Choose two.) - 🧠 ANSWER ✔✔1.) to reduce use of memory and processor
resources
2.) to reduce SPF calculations
At which OSPF state are neighbor routers converged and able to exchange
routing updates? - 🧠 ANSWER ✔✔Full
The OSPF hello timer has been set to 15 seconds on a router in a point-to-
point network. By default, what is the dead interval on this router? - 🧠
ANSWER ✔✔60 seconds
What happens immediately after two OSPF routers have exchanged hello
packets and have formed a neighbor adjacency? - 🧠 ANSWER ✔✔They
exchange abbreviated lists of their LSDBs.
Which statement is correct about multiarea OSPF? - 🧠 ANSWER
✔✔Arranging routers into areas partitions a large autonomous system in
order to lighten the load on routers.
COPYRIGHT©PROFFKERRYMARTIN 2025/2026. YEAR PUBLISHED 2026. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE.
PRIVACY STATEMENT. ALL RIGHTS RESERVED
Concepts and Configuration
Exam Answers
What is a function of OSPF hello packets? - 🧠 ANSWER ✔✔to discover
neighbors and build adjacencies between them
Which OPSF packet contains the different types of link-state
advertisements? - 🧠 ANSWER ✔✔LSU
Which statements describe features of the OSPF topology table? (Choose
three.) - 🧠 ANSWER ✔✔1.) The table can be viewed via the show ip ospf
database command.
,2.) It is a link-state database that represents the network topology.
3.) When converged, all routers in an area have identical topology tables.
What does an OSPF area contain? - 🧠 ANSWER ✔✔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? - 🧠 ANSWER ✔✔OSPF will remove that
neighbor from the router link-state database.
What is the order of packet types used by an OSPF router to establish
convergence? - 🧠 ANSWER ✔✔Hello, DBD, LSR, LSU, LSAck
What is a feature of the OSPF routing protocol? - 🧠 ANSWER ✔✔It scales
well in both small and large networks.
What is used to create the OSPF neighbor table? - 🧠 ANSWER
✔✔adjacency database
What is identical on all OSPF routers within a single area? - 🧠 ANSWER
✔✔link-state database
, What function is performed by the OSPF designated router? - 🧠 ANSWER
✔✔dissemination of LSAs
What are two reasons for creating an OSPF network with multiple areas?
(Choose two.) - 🧠 ANSWER ✔✔1.) to reduce use of memory and processor
resources
2.) to reduce SPF calculations
At which OSPF state are neighbor routers converged and able to exchange
routing updates? - 🧠 ANSWER ✔✔Full
The OSPF hello timer has been set to 15 seconds on a router in a point-to-
point network. By default, what is the dead interval on this router? - 🧠
ANSWER ✔✔60 seconds
What happens immediately after two OSPF routers have exchanged hello
packets and have formed a neighbor adjacency? - 🧠 ANSWER ✔✔They
exchange abbreviated lists of their LSDBs.
Which statement is correct about multiarea OSPF? - 🧠 ANSWER
✔✔Arranging routers into areas partitions a large autonomous system in
order to lighten the load on routers.
COPYRIGHT©PROFFKERRYMARTIN 2025/2026. YEAR PUBLISHED 2026. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE.
PRIVACY STATEMENT. ALL RIGHTS RESERVED
