Introducing Cisco Data Center Networking (DCICN, legacy) — Question 8

Which two statements about PCIe are true? (Choose two.)

Answer options

• A. The PCle supports native hot-swap functionality.
• B. You can install a PCI Express x16 adapter into an x4 slot.
• C. The PCIe standard is a bus-based system in which all the devices share the same bidirectional, 32-bit or 64-bit, parallel signal path.
• D. The PCIe 4.0 standard doubles the transfer rate compared to PCIe 5.0.
• E. A link that is composed of four lanes is called an x4 link.

Correct answer: D, E

Explanation

Option D is correct because PCIe 4.0 indeed has a higher transfer rate than PCIe 3.0, not 5.0. Option E is correct as it accurately defines an x4 link. The other options are incorrect; A is false because PCIe does not support native hot-swap, B is misleading as x16 cards can fit in x4 slots but with reduced functionality, and C is incorrect since PCIe is a point-to-point architecture, not a bus-based system.