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An OSPF router receives an LSA. The router checks its sequence number and finds thatthis number is higher than the sequence number it already has. Which two tasks doesthe router perform with the LSA?
- a)Ignores the LSA
- b)Adds it to the database
- c)Sends newer LSU update to source router
- d)Floods the LSA to the other routers
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
An OSPF router receives an LSA. The router checks its sequence number ...
Answer: b
Explanation: An OSPF router receives an LSA. The router checks its sequence number and finds that this number is higher than the sequence number Adds it to the database, Floods the LSA to the other routers.
Explanation: An OSPF router receives an LSA. The router checks its sequence number and finds that this number is higher than the sequence number Adds it to the database, Floods the LSA to the other routers.
Most Upvoted Answer
An OSPF router receives an LSA. The router checks its sequence number ...
Explanation:
When an OSPF router receives a Link State Advertisement (LSA) from another router, it checks the sequence number of the LSA. The sequence number is used to determine the freshness of the information contained in the LSA. If the sequence number of the received LSA is higher than the sequence number the router already has, it indicates that the new LSA contains more up-to-date information.
In this scenario, the correct tasks that the router performs with the LSA are:
1. Adds it to the database:
When the router determines that the received LSA has a higher sequence number, it adds the LSA to its OSPF database. The database is a collection of LSAs that the router uses to build and maintain its routing table. By adding the LSA to the database, the router ensures that it has the most recent information about the network topology.
2. Floods the LSA to the other routers:
After adding the LSA to its database, the router needs to inform other routers in the OSPF network about the updated information. It does this by flooding the LSA to the other routers. Flooding means that the router sends the LSA to all its OSPF neighbors, who in turn send it to their neighbors, until all routers in the network have received the updated LSA. This ensures that all routers have consistent information about the network topology.
Therefore, the correct answer is option 'B': Adds it to the database. This is because the router recognizes that the received LSA has a higher sequence number, indicating that it contains more recent information, and therefore adds it to its OSPF database.
When an OSPF router receives a Link State Advertisement (LSA) from another router, it checks the sequence number of the LSA. The sequence number is used to determine the freshness of the information contained in the LSA. If the sequence number of the received LSA is higher than the sequence number the router already has, it indicates that the new LSA contains more up-to-date information.
In this scenario, the correct tasks that the router performs with the LSA are:
1. Adds it to the database:
When the router determines that the received LSA has a higher sequence number, it adds the LSA to its OSPF database. The database is a collection of LSAs that the router uses to build and maintain its routing table. By adding the LSA to the database, the router ensures that it has the most recent information about the network topology.
2. Floods the LSA to the other routers:
After adding the LSA to its database, the router needs to inform other routers in the OSPF network about the updated information. It does this by flooding the LSA to the other routers. Flooding means that the router sends the LSA to all its OSPF neighbors, who in turn send it to their neighbors, until all routers in the network have received the updated LSA. This ensures that all routers have consistent information about the network topology.
Therefore, the correct answer is option 'B': Adds it to the database. This is because the router recognizes that the received LSA has a higher sequence number, indicating that it contains more recent information, and therefore adds it to its OSPF database.
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An OSPF router receives an LSA. The router checks its sequence number and finds thatthis number is higher than the sequence number it already has. Which two tasks doesthe router perform with the LSA?a)Ignores the LSAb)Adds it to the databasec)Sends newer LSU update to source routerd)Floods the LSA to the other routersCorrect answer is option 'B'. Can you explain this answer?
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An OSPF router receives an LSA. The router checks its sequence number and finds thatthis number is higher than the sequence number it already has. Which two tasks doesthe router perform with the LSA?a)Ignores the LSAb)Adds it to the databasec)Sends newer LSU update to source routerd)Floods the LSA to the other routersCorrect answer is option 'B'. Can you explain this answer? for Computer Science Engineering (CSE) 2025 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 An OSPF router receives an LSA. The router checks its sequence number and finds thatthis number is higher than the sequence number it already has. Which two tasks doesthe router perform with the LSA?a)Ignores the LSAb)Adds it to the databasec)Sends newer LSU update to source routerd)Floods the LSA to the other routersCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Computer Science Engineering (CSE) 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for An OSPF router receives an LSA. The router checks its sequence number and finds thatthis number is higher than the sequence number it already has. Which two tasks doesthe router perform with the LSA?a)Ignores the LSAb)Adds it to the databasec)Sends newer LSU update to source routerd)Floods the LSA to the other routersCorrect answer is option 'B'. Can you explain this answer?.
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