Which command is used to display the collection of OSPF link states?
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A. B. C. D.D.
The "show ip ospf database" command displays the link states.
Here is an example: Here is the lsa database on R2
R2#show ip ospf database - OSPF Router with ID (2.2.2.2) (Process ID 1) Router Link States (Area 0) Link ID ADV Router Age Seq# Checksum Link count2.2.2.2 2.2.2.2 793 0x80000003 0x004F85 210.4.4.4 10.4.4.4 776 0x80000004 0x005643 1111.111.111.111 111.111.111.111 755 0x80000005 0x0059CA 2133.133.133.133 133.133.133.133 775 0x80000005 0x00B5B1 2 Net Link States (Area 0) Link ID ADV Router Age Seq# Checksum10.1.1.1 111.111.111.111 794 0x80000001 0x001E8B10.2.2.3 133.133.133.133 812 0x80000001 0x004BA910.4.4.1 111.111.111.111 755 0x80000001 0x007F1610.4.4.3 133.133.133.133 775 0x80000001 0x00C31F.
The correct answer is option B - show ip ospf lsa database.
OSPF (Open Shortest Path First) is a routing protocol that is commonly used in enterprise networks. It uses Link State Advertisements (LSAs) to communicate information about network topology to other routers within an OSPF area. Each router maintains a database of LSAs received from other routers, and this database is used to build a topology map of the network.
The command show ip ospf lsa database is used to display the collection of OSPF LSAs that a router has received from other routers in the OSPF domain. This command provides a detailed view of the network topology, including information about each router, network, and link within the OSPF domain.
Here's an overview of the options given in the question:
A. show ip ospf link-state - This command is not a valid Cisco IOS command.
B. show ip ospf lsa database - This command is used to display the collection of OSPF LSAs that a router has received from other routers in the OSPF domain.
C. show ip ospf neighbors - This command is used to display the OSPF neighbors that a router is currently connected to.
D. show ip ospf database - This command is used to display the contents of a router's OSPF database, including information about OSPF neighbors, LSAs, and other OSPF-related data.
In summary, option B (show ip ospf lsa database) is the correct command to display the collection of OSPF link states.