Which of the following descriptions about the difference between stacking and clustering is wrong? (Multiple choice)

Question

Options

• ABoth stacking and clustering can improve resource utilization and reduce the complexity of network planning.
• BThe inter-card backplane between clustering is the back-end of many physical devices (multiple chips), and a stacked switch is called a cluster.
• CBoth stacking and clustering can be combined with link aggregation technology to easily build a highly reliable, loop-free campus network
• DBoth stacking and clustering can combine multiple switches to logically virtualize into one switch

• A
  7% (2)
• B
  81% (22)
• C
  11% (3)

Explanation

Option B is wrong because it reverses the terminology: it incorrectly states that "a stacked switch is called a cluster," when in fact a stack is a stack and a cluster is a cluster - these are distinct technologies with different architectures. Stacking typically connects access-layer switches via dedicated stacking cables to form one logical switch, while clustering interconnects chassis-based (core/distribution) devices using high-speed network links - the two are not interchangeable labels. Option D is wrong because while stacking truly virtualizes multiple switches into a single logical switch (unified management, control, and data planes), clustering creates a logical cluster - a cooperative system that may retain certain per-chassis characteristics and is not purely equivalent to "one switch" in the same sense. Options A and C are correct descriptions: both technologies do simplify network planning, improve resource utilization, and can pair with link aggregation (LAG/LACP) to build redundant, loop-free networks - so they are not wrong and should not be selected.

Memory tip: Think "S-S-S" - Stacking is for Switches (access layer) and creates one logical Switch; clustering is for Chassis at the Core and creates a Cluster, not just "one switch." Any answer that blurs these distinctions or swaps their names is a wrong description.

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