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What is the MAC address?

What is the MAC address? Correct Answer A unique number that identifies a device connected to the internet

A Media Access Control address (MAC address) is a unique identifier assigned to a network interface controller (NIC) for use as a network address in communications within a network segment.

Key Points

  • The MAC Address ensures the computer device's physical location.
  • It helps us to identify a given device on the available network uniquely.
  • The MAC address is manufactured into every network card, such as an Ethernet card or Wi-Fi card, and therefore cannot be changed.
  • MAC addresses are recognizable as six groups of two hexadecimal digits, separated by hyphens, colons, or without a separator.

Hence MAC address is a unique number that identifies a device connected to the internet.

Additional Information

  • Frame check sequence (FCS) is an error-detecting code added to a frame in a communication protocol. Frames are used to send payload data from a source to a destination.
  • A port number is a way to identify a specific process to which an internet or other network message is to be forwarded when it arrives at a server.
  • A Uniform Resource Locator also referred to as URL is the unique address used to identify a Web site. It is similar to a home address, used to identify someone's mailing address.

Related Questions

Consider the following two statements. S1 : Destination MAC address of an ARP reply is a broadcast address. S2 : Destination MAC address of an ARP request is a broadcast address. Which one of the following choices is correct?
Which fields are contained within an IEEE Ethernet frame header?
1. Source and destination MAC address
2. Source and destination network address
3. Source and destination MAC address and source and destination network address
4. FCS field
If a switch receives a frame and the source MAC address is not in the MAC address table but the destination address is, what will the switch do with the frame?
Given below are two statements Statement I :  The MAC address identifies which device is connected at a given IP address Statement II : MAC addresses are unique to each device In light of the above statements, choose the correct answer from the options given below
In the following question below are given some statements followed by some conclusions. Taking the given statements to be true even if they seem to be at variance from commonly known facts, read all the conclusions and then decide which of the given conclusion logically follows the given statements. Statements: Some laptops are desktops Some mac are desktops No tablet is desktop Conclusions: I. Some laptops are mac. II. Some laptop is tablet. III. Some mac is tablet.
Which of the following statements is/are correct? 1. An address generated by the CPU is commonly referred to as a physical address. 2. An address seen by the memory unit is commonly referred to as a logical address. 3. The run-time mapping from virtual to physical address is done by the memory management unit (MMU). Select the correct answer using the code given below.
Which two statements describe the IP address 10.16.3.65/23?
1. The subnet address is 10.16.3.0 255.255.254.0.
2. The lowest host address in the subnet is 10.16.2.1 255.255.254.0.
3. The last valid host address in the subnet is 10.16.2.254 255.255.254.0.
4. The broadcast address of the subnet is 10.16.3.255 255.255.254.0.
The MAC (Media Access Control) address of the network card is used in both Ethernet and Token-Ring networks and is essential for communication. What does MAC provide?
On a non-pipelined sequential processor, a program segment, which is a part of the interrupt service routine, is given to transfer 500 bytes from an I/O device to memory.     Initialize the address register     Initialize the count to 500 LOOP: Load a byte from device     Store in memory at address given by address register     Increment the address register     Decrement the count     If count! = 0 go to LOOP Assume that each statement in this program is equivalent to a machine instruction which takes one clock cycle to execute if it is a non-load/store instruction. The load-store instructions take two clock cycles to execute. The designer of the system also has an alternate approach of using the DMA controller to implement the same transfer. The DMA controller requires 20 clock cycles for initialization and other overheads. Each DMA transfer cycle takes two clock cycles to transfer one byte of data from the device to the memory. What is the approximate speedup when the DMA controller based design is used in place of the interrupt driven program based input-output?
In a class B subnet, we know the IP address of one host and the mask as given below: IP address = 125.134.112.66 Mask = 255.255.224.0 What is the first address (Network address)?