What should a network engineer configure to set high availability for a load balanced virtual server?

The correct answer is B. A backup virtual server. See the full explanation below for the reasoning.

Question

Options

ASession persistence
BA backup virtual server
CLoad balancing policies
DLoad balancing Services

How the community answered

(47 responses)

A
9% (4)
B
74% (35)
C
4% (2)
D
13% (6)

Community Discussion

Ola B.Jun 26, 2026

B is your answer. When the primary virtual server goes down, the backup virtual server takes over traffic so users stay connected, which is exactly what high availability means in a NetScaler load balancing setup, and the fastest way to confirm this is to spin up a lab, configure a primary and backup virtual server, kill the primary, and watch the failover happen live.

Mateus R.Jun 26, 2026

Think of it like a hospital naming a backup surgeon before the procedure starts, not after the main one collapses, and in the same way, high availability on a load balanced virtual server means you designate a backup virtual server to take over if the primary goes down. Do you know whether the backup virtual server needs to be in the same subnet as the primary, or can it sit on a completely separate segment and still catch that redirected traffic?

Wesley A.Jun 26, 2026

B is right, though A trips people up because "persistence" sounds like "availability."

Ola B.Jun 27, 2026

Persistence just means it survives a restart, not that it stays reachable if the node goes down, so you can have a persistent store that is completely unavailable during a failure, which is exactly the trap A sets.

Imani T.Jun 26, 2026

If the primary virtual server goes down, what takes over traffic, a policy or a backup?

Full 1Y0-350 Practice