200-150 · Question #49
Which address is valid in the data link layer of the OSI reference model?
The correct answer is C. 07-AB-02-1F-35-C8. The data link layer (Layer 2) uses MAC addresses, which are 48-bit values represented as six hexadecimal octets separated by hyphens.
Question
Which address is valid in the data link layer of the OSI reference model?
Options
- A192.168.20.1
- B09-1B-02-1C-87
- C07-AB-02-1F-35-C8
- D172.16.10.12
How the community answered
(41 responses)- A5% (2)
- C93% (38)
- D2% (1)
Why each option
The data link layer (Layer 2) uses MAC addresses, which are 48-bit values represented as six hexadecimal octets separated by hyphens.
192.168.20.1 is an IPv4 address, which operates at Layer 3 (Network layer), not Layer 2.
09-1B-02-1C-87 contains only five octets, making it an invalid MAC address - a valid MAC address requires exactly six octets (48 bits).
07-AB-02-1F-35-C8 is a valid 48-bit MAC address consisting of exactly six hexadecimal octets separated by hyphens, which is the correct format for data link layer addressing per IEEE 802. MAC addresses uniquely identify network interface cards at Layer 2 of the OSI model.
172.16.10.12 is an IPv4 address used at Layer 3 (Network layer), not the data link layer.
Concept tested: OSI Layer 2 MAC address format
Source: https://www.cisco.com/c/en/us/support/docs/interfaces-modules/port-adapters/12768-pm-overview.html
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