12 Questions
What type of database is created by the Link-state database?
Topology table
What is an advantage of Multi-area OSPF over single area OSPF?
Reduced frequency of SPF calculations
Which OSPF packet contains one or more LSAs?
LSU link-state update packet
What is the purpose of the Hello packet in OSPF?
To discover neighbors and build adjacencies
Which database is unique for each router in OSPF?
Adjacency database and Forwarding database
What is identical on all OSPF routers within a single area?
Link-state database
What is the purpose of the LSU packet in OSPF?
To send specifically requested link-state records
What is the benefit of reduced link-state update overhead in Multi-area OSPF?
Reduced router CPU utilization
What is the purpose of the Database Description packet?
To check for database synchronization between routers
What is common to all OSPF routers within a single area?
Link-state database
What is the difference between the Adjacency and Forwarding databases?
Adjacency database is used for neighbor discovery, while Forwarding database is used for routing
What is the result of reduced frequency of SPF calculations in Multi-area OSPF?
Reduced router CPU utilization
Study Notes
OSPF Databases
- Adjacency database creates the neighbor table
- Link-state database (LSDB) creates the topology table
- Forwarding database creates the routing table
- Each router has a unique Adjacency and Forwarding database (Routing and Neighbor table)
Multi-Area OSPF Advantages
- Smaller routing tables
- Reduced link-state update overhead
- Reduced frequency of SPF calculations
OSPF Packets
- LSU (Link-State Update) packet contains one or more LSAs (Link-State Advertisements)
- LSU packet is used to send specifically requested link-state records
- Hello packet is used to discover neighbors and build adjacencies between them
- Database Description packet is used to check for database synchronization between routers
OSPF Router Characteristics
- Link-state database is identical on all OSPF routers within a single area
OSPF Databases
- Adjacency database creates the neighbor table
- Link-state database (LSDB) creates the topology table
- Forwarding database creates the routing table
- Each router has a unique Adjacency and Forwarding database (Routing and Neighbor table)
Multi-Area OSPF Advantages
- Smaller routing tables
- Reduced link-state update overhead
- Reduced frequency of SPF calculations
OSPF Packets
- LSU (Link-State Update) packet contains one or more LSAs (Link-State Advertisements)
- LSU packet is used to send specifically requested link-state records
- Hello packet is used to discover neighbors and build adjacencies between them
- Database Description packet is used to check for database synchronization between routers
OSPF Router Characteristics
- Link-state database is identical on all OSPF routers within a single area
Test your understanding of OSPF databases, multi-area advantages, and OSPF packet types. Learn about the different types of OSPF databases, the benefits of multi-area OSPF, and the composition of OSPF packets.
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