200-150 Question #222: Real Exam Question with Answer & Explanation

The correct answer is B: 00:00:0C:5C: 5E: A2: F3. The OSI data link layer (Layer 2) uses MAC addresses in hexadecimal notation. IPv4 and IPv6 addresses are network layer (Layer 3) constructs and are not valid at Layer 2.

Cisco Data Center Networking Technologies

Question

Which two addresses are valid in the data layer of the OSI reference model? (Choose two.)

Options

A
1. 1.1.1
B00:00:0C:5C: 5E: A2: F3
C34:75:10:88:5A
DFe80::88a1: 74f0:78748b51:1919
E2001:0db8:85a3::8a2a:0370:7334

Explanation

The OSI data link layer (Layer 2) uses MAC addresses in hexadecimal notation. IPv4 and IPv6 addresses are network layer (Layer 3) constructs and are not valid at Layer 2.

Common mistakes.

A. 10.1.1.1 is a dotted-decimal IPv4 address, which is a Layer 3 network layer address used for logical routing, not a Layer 2 data link layer address.
D. Fe80::88a1:74f0:78748b51:1919 is an IPv6 link-local address that operates at Layer 3, not at the Layer 2 data link layer.
E. 2001:0db8:85a3::8a2a:0370:7334 is a globally routable IPv6 address and belongs to the network layer (Layer 3), not the data link layer (Layer 2).

Concept tested. OSI Layer 2 MAC address identification

Reference. https://learn.microsoft.com/en-us/windows-hardware/drivers/network/osi-reference-model

Topics

#OSI model#MAC address#data link layer#Layer 2 addressing

Community Discussion

No community discussion yet for this question.

Full 200-150 Practice