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What is route poisoning?
  • a)
    It sends back the protocol received from a router as a poison pill, which stops the regular updates. The use of variable length subnet masks is permitted
  • b)
    It is information received from a router that can’t be sent back to the originating router.RIPv2 supports classless routing
  • c)
    It prevents regular update messages from reinstating a route that has just come up
  • d)
    It describes when a router sets the metric for a downed link to infinity
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
What is route poisoning?a)It sends back the protocol received from a r...
Answer: d
Explanation: When a network goes down, the distance-vector routing protocol initiates route poisoning by advertising the network with a metric of 16, or unreachable.
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What is route poisoning?a)It sends back the protocol received from a r...
Route Poisoning:
Route poisoning is a technique used in distance-vector routing protocols to prevent routing loops and ensure efficient routing in a network.

Explanation:
- Definition: Route poisoning involves a router setting the metric for a downed link to infinity, making the route unusable. This prevents regular update messages from reinstating a route that has just come up.
- Preventing Routing Loops: By setting the metric to infinity for a downed link, route poisoning helps in preventing routing loops. It informs other routers in the network that the route is no longer available.
- Efficient Routing: Route poisoning helps in quickly propagating information about a failed link throughout the network, allowing routers to update their routing tables and find alternative paths.
- Example: For example, in a network using the RIP (Routing Information Protocol) routing protocol, when a router detects that a link has failed, it sends an update with a metric of 16 (infinity) to inform other routers about the unavailability of that route.
- Impact on Convergence: Route poisoning helps in faster convergence of the network by promptly updating routing tables when a link goes down.
- Protocol Support: Route poisoning is commonly used in distance-vector routing protocols like RIP to maintain network stability and prevent routing anomalies.
In conclusion, route poisoning plays a crucial role in ensuring efficient and loop-free routing in network environments using distance-vector routing protocols by marking failed routes as unreachable with an infinite metric.
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What is route poisoning?a)It sends back the protocol received from a router as a poison pill, which stops the regular updates. The use of variable length subnet masks is permittedb)It is information received from a router that can’t be sent back to the originating router.RIPv2 supports classless routingc)It prevents regular update messages from reinstating a route that has just come upd)It describes when a router sets the metric for a downed link to infinityCorrect answer is option 'D'. Can you explain this answer?
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What is route poisoning?a)It sends back the protocol received from a router as a poison pill, which stops the regular updates. The use of variable length subnet masks is permittedb)It is information received from a router that can’t be sent back to the originating router.RIPv2 supports classless routingc)It prevents regular update messages from reinstating a route that has just come upd)It describes when a router sets the metric for a downed link to infinityCorrect answer is option 'D'. Can you explain this answer? for Computer Science Engineering (CSE) 2024 is part of Computer Science Engineering (CSE) preparation. The Question and answers have been prepared according to the Computer Science Engineering (CSE) exam syllabus. Information about What is route poisoning?a)It sends back the protocol received from a router as a poison pill, which stops the regular updates. The use of variable length subnet masks is permittedb)It is information received from a router that can’t be sent back to the originating router.RIPv2 supports classless routingc)It prevents regular update messages from reinstating a route that has just come upd)It describes when a router sets the metric for a downed link to infinityCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Computer Science Engineering (CSE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for What is route poisoning?a)It sends back the protocol received from a router as a poison pill, which stops the regular updates. The use of variable length subnet masks is permittedb)It is information received from a router that can’t be sent back to the originating router.RIPv2 supports classless routingc)It prevents regular update messages from reinstating a route that has just come upd)It describes when a router sets the metric for a downed link to infinityCorrect answer is option 'D'. Can you explain this answer?.
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