Comprehensive CCNA OSPF Routing and
Neighboring Concepts Exam | Questions and
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Terms in this set (311)
What does OSPF stand for? Open Shortest Path First
What type of protocol is OSPF? An interior gateway protocol (IGP)
What are the two versions of OSPF OSPFv2 for IPv4 networks and OSPFv3 for IPv6
currently in use? networks
What does the 'Open' in OSPF It is an open standard protocol, not proprietary to
signify? Cisco.
What algorithm does OSPF use to Dijkstra's algorithm, also known as the Shortest Path
calculate routes? First (SPF) algorithm.
What are the three main steps OSPF 1. Form neighbor relationships, 2. Exchange routing
routers go through to share routing information, 3. Calculate best routes.
information?
, What is the link-state database A database that contains the map of the network
(LSDB) in OSPF? topology used for calculating the shortest path.
What is an LSA in OSPF? Link-state advertisement, a data structure used to
exchange routing information.
What is LSA flooding? The process of sending LSAs to all routers in the
OSPF area to ensure they have an identical LSDB.
What is the benefit of dividing a It minimizes resource usage and limits the impact of
large OSPF network into multiple network changes.
areas?
What is area 0 in OSPF? The backbone area to which all other non-
backbone areas must connect.
What are the four types of routers in 1. Internal router, 2. Backbone router, 3. Area
OSPF? border router (ABR), 4. Autonomous system
boundary router (ASBR).
What defines an internal router in All OSPF-enabled interfaces are in the same area.
OSPF?
What is the role of a backbone It has at least one interface in area 0.
router?
What does an area border router Connects one or more areas to area 0.
(ABR) do?
What is an autonomous system A router that connects the OSPF autonomous
boundary router (ASBR)? system to external networks.
How does OSPF categorize routes? As intra-area, inter-area, or external.
Neighboring Concepts Exam | Questions and
Answers | Verified Solutions | 2026 Edition | Pass
Guaranteed
Save
Terms in this set (311)
What does OSPF stand for? Open Shortest Path First
What type of protocol is OSPF? An interior gateway protocol (IGP)
What are the two versions of OSPF OSPFv2 for IPv4 networks and OSPFv3 for IPv6
currently in use? networks
What does the 'Open' in OSPF It is an open standard protocol, not proprietary to
signify? Cisco.
What algorithm does OSPF use to Dijkstra's algorithm, also known as the Shortest Path
calculate routes? First (SPF) algorithm.
What are the three main steps OSPF 1. Form neighbor relationships, 2. Exchange routing
routers go through to share routing information, 3. Calculate best routes.
information?
, What is the link-state database A database that contains the map of the network
(LSDB) in OSPF? topology used for calculating the shortest path.
What is an LSA in OSPF? Link-state advertisement, a data structure used to
exchange routing information.
What is LSA flooding? The process of sending LSAs to all routers in the
OSPF area to ensure they have an identical LSDB.
What is the benefit of dividing a It minimizes resource usage and limits the impact of
large OSPF network into multiple network changes.
areas?
What is area 0 in OSPF? The backbone area to which all other non-
backbone areas must connect.
What are the four types of routers in 1. Internal router, 2. Backbone router, 3. Area
OSPF? border router (ABR), 4. Autonomous system
boundary router (ASBR).
What defines an internal router in All OSPF-enabled interfaces are in the same area.
OSPF?
What is the role of a backbone It has at least one interface in area 0.
router?
What does an area border router Connects one or more areas to area 0.
(ABR) do?
What is an autonomous system A router that connects the OSPF autonomous
boundary router (ASBR)? system to external networks.
How does OSPF categorize routes? As intra-area, inter-area, or external.
