JN0-281 · Question #30
Which state in the adjacency process do OSPF routers check the MTU size?
The correct answer is B. Exchange. In OSPF, routers exchange link-state information in different stages to establish full adjacency. The MTU size is checked during the Exchange state. OSPF Adjacency Process: OSPF routers go through multiple stages when forming an adjacency: Down, Init, 2-Way, ExStart, Exchange…
Question
Which state in the adjacency process do OSPF routers check the MTU size?
Options
- AInit
- BExchange
- CDone
- DExStart
How the community answered
(49 responses)- A2% (1)
- B92% (45)
- C4% (2)
- D2% (1)
Explanation
In OSPF, routers exchange link-state information in different stages to establish full adjacency. The MTU size is checked during the Exchange state. OSPF Adjacency Process: OSPF routers go through multiple stages when forming an adjacency: Down, Init, 2-Way, ExStart, Exchange, Loading, and Full. During the Exchange state, OSPF routers exchange Database Description (DBD) packets to describe their link-state databases. The MTU size is checked at this stage to ensure both routers can successfully exchange these packets without fragmentation. If there is an MTU mismatch, the routers may fail to proceed past the Exchange state.
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