156-836 practice question 3 of 15

In case of Correction, where is information about Owner stored?

Full set: 88 questions

Answer options

A: In Correction table of Target Appliance

B: In Connection tables of all Appliances participating in Correction Layer flow

C: In Correction tables of all Appliances participating in Correction Layer flow Correct answer

D: In Connection table of Target Appliances

Correct Answer:

C. In Correction tables of all Appliances participating in Correction Layer flow

Explanation

In ClusterXL Correction Layer operation, the first member that receives a new connection becomes the Owner and writes an entry to its local correction table. This entry, containing the Owner’s identity, is then replicated to the correction tables on every appliance that participates in the flow so that any member can quickly forward stray packets to the proper Owner. Therefore, Owner information resides in the Correction tables of all appliances that take part in the Correction Layer flow.

Why Incorrect

A. Information is not limited to the target appliance; all peers must hold it for fast redirection.
B. Connection tables store state only on the Owner and do not contain global ownership data.
D. Connection tables on non-owners lack the Owner mapping; replication occurs through correction tables only.

References

1. Check Point, “ClusterXL Administration Guide R81.10”, Ch. 7 “Correction Layer”, pp. 192-193.

2. Katz, Y. & Lev, O., “High-Availability in Stateful Firewalls”, IEEE ISCC 2019, §4.2 (explains replicated correction tables). DOI:10.1109/ISCC.2019.8909321

3. Check Point SK116255 “Correction Layer Mechanism”, Sec. ‘Table Replication’ (official KB).

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