Which function of the LSA packet pacing feature is true?
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A. B. C. D.B.
LSA (Link State Advertisement) packet pacing feature is used to control the rate at which LSA updates are flooded in the OSPF (Open Shortest Path First) network. This feature helps in reducing the amount of flooding that occurs during periods of network instability, and thus reduces the network traffic overhead.
Out of the given options, the function of LSA packet pacing feature is best described by option D: "It reduces routing protocol churn by reducing network updates during periods of network instability."
During periods of network instability, routers in the OSPF network receive frequent LSA updates from other routers. These updates can cause routing protocol churn, which can lead to suboptimal routing decisions, and result in network congestion and instability.
The LSA packet pacing feature helps to mitigate these issues by reducing the number of network updates during periods of instability. This is achieved by introducing a delay between the time an LSA update is received and the time it is flooded to other routers in the network. This delay allows time for the network to stabilize before flooding the LSA update, and thus helps to reduce the network traffic overhead and routing protocol churn.
Option A: "It determines the minimum amount of time that must pass before accepting the same LSA update" is not a function of the LSA packet pacing feature. This function is performed by the OSPF protocol itself, which uses a sequence number to determine if an LSA update is new or a duplicate.
Option B: "It ensures that an unstable network with a large amount of updates does not completely consume router resources" is not a function of the LSA packet pacing feature. This function is performed by other OSPF features, such as route summarization and route filtering, which help to reduce the amount of network traffic and conserve router resources.
Option C: "It ensures that an unstable link does not result in uncontrolled routing churn which avoids performing a new best path calculation for the entire network every time" is not a function of the LSA packet pacing feature. This function is performed by other OSPF features, such as SPF (Shortest Path First) algorithm, which calculates the best path for each router based on the LSDB (Link State Database).