RCDD · Question #363
Which of the following is an address used to uniquely identify each device on a LAN with an address coded in the network interface card?
The correct answer is A. MAC. A MAC (Media Access Control) address is a hardware-level identifier burned into the NIC that uniquely identifies each device on a local area network at Layer 2.
Question
Which of the following is an address used to uniquely identify each device on a LAN with an address coded in the network interface card?
Options
- AMAC
- BTCP
- CIP
- DPhysical Layer
How the community answered
(52 responses)- A75% (39)
- B4% (2)
- C8% (4)
- D13% (7)
Why each option
A MAC (Media Access Control) address is a hardware-level identifier burned into the NIC that uniquely identifies each device on a local area network at Layer 2.
A MAC address is a 48-bit address permanently assigned by the manufacturer into the network interface card, operating at the OSI Data Link layer (Layer 2). It is used by switches to forward frames to the correct device within a LAN segment and is globally unique per device, making it the correct answer for hardware-based LAN identification.
TCP (Transmission Control Protocol) is a transport layer protocol that manages data delivery, not an address type coded into hardware.
An IP address is a logical Layer 3 address assigned by software or DHCP and is not permanently coded into the NIC.
Physical Layer refers to Layer 1 of the OSI model, which deals with signal transmission and is not an address type.
Concept tested: MAC address as hardware LAN device identifier
Source: https://standards.ieee.org/faqs/regauth/
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