On a NetScaler system, the __________ timeout value will mark any session that has reached the idle timeout for cleanup. (Choose the correct option to complete the sentence.)

The correct answer is C. Zombie. See the full explanation below for the reasoning.

Question

Options

AClient
BServer
CZombie
DNATPCB

How the community answered

(44 responses)

A
5% (2)
B
9% (4)
C
84% (37)
D
2% (1)

Community Discussion

Toby R.Jun 26, 2026

The answer is C, Zombie. The Zombie timeout is specifically what NetScaler uses to flag sessions that have already hit their idle timeout and are now waiting to be cleaned up from the session table. Think of it as a two-step process, the session goes idle, then it gets marked as a zombie before the system actually purges it. Client and Server timeouts control how long NetScaler waits on those respective sides before considering a connection stale, and NATPCB is about NAT port control block entries, not session cleanup marking. This one tripped up a few people in my study group who confused Zombie with the general idle timeout concept, but they are distinct values you can tune separately on the appliance.

Yusuf A.Jun 27, 2026

Good breakdown, and worth adding that on high-traffic appliances the zombie timeout actually matters a lot for session table headroom, something my senior pointed out when we were troubleshooting a table exhaustion issue where sessions were piling up in zombie state longer than expected because the default value was too high for our traffic pattern.

Yusuf A.Jun 26, 2026

So the Zombie timeout flags idle sessions for cleanup, right, but does that mean the session is actually closed immediately or just marked first?

Wesley A.Jun 26, 2026

Zombie timeout trips everyone up, I put Client my first attempt and lost that point.

Anjali D.Jun 24, 2026

Group agrees on C, Zombie timeout flags idle sessions awaiting cleanup.

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