H12-821_V1.0 · Question #862
VXLAN is based on UDP encapsulation, which encapsulates Ethernet data frames on UDP in IP packets, so it is called MAC in UDP encapsulation.
The correct answer is A. TRUE. Option A is correct because VXLAN (Virtual Extensible LAN) encapsulates Layer 2 Ethernet (MAC) frames inside a VXLAN header, which is then carried inside a UDP segment, which is itself carried inside an IP packet - making the full descriptor "MAC in UDP." This allows Layer 2…
Question
Options
- ATRUE
- BFALSE
How the community answered
(34 responses)- A74% (25)
- B26% (9)
Explanation
Option A is correct because VXLAN (Virtual Extensible LAN) encapsulates Layer 2 Ethernet (MAC) frames inside a VXLAN header, which is then carried inside a UDP segment, which is itself carried inside an IP packet - making the full descriptor "MAC in UDP." This allows Layer 2 networks to be stretched across Layer 3 IP infrastructure, enabling virtual network overlays in data centers.
Option B (FALSE) is incorrect because the statement accurately describes VXLAN's encapsulation mechanism; there is no error in the description.
Memory tip: Think of the acronym layers bottom-up - "MAC rides UDP rides IP" - just like a shipping container (MAC frame) placed inside a truck (UDP) that drives on a highway (IP). The key distinction from other tunneling protocols is that VXLAN specifically uses UDP (not TCP or GRE), making the "MAC in UDP" label precise and exam-worthy.
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