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Back Computer Computer Engineering Dictionary Computer Networks Medium Access Control Sublayer MAC

Medium Access Control Sublayer MAC

  1. To determine who is allowed to access the media.
  2. To represent a frame structure with MAC addresses inside
  3. To determine the start and end of a frame.

The hardware that implements the MAC is referred to as a Medium Access Controller.

Medium access control Address or Media access control Address:

The MAC address is a unique identifier assigned to a Network adapter on a network by the manufacturer at the time of manufacturing it. MAC addresses are also known as Physical addresses or hardware addresses. As this number is given to the device at the time of manufacture, the device should be uniquely identifiable amongst all other network devices in the world. This guarantees that each device in a network will have a different MAC address. The MAC address generally remains fixed and follows the network device. MAC addresses function at MAC sublayer of the data link layer (layer 2 in the OSI model).

MAC Address Formats:

MAC addresses are 12-digit hexadecimal numbers i.e 48 bits in length. It exists in two formats. MM:MM:MM:SS:SS:SS and MM-MM-MM-SS-SS-SS The first half of a MAC address represents the ID number of the adapter manufacturer whereas the second half of a MAC address represents the serial number assigned to the adapter by the manufacturer.

Multiple Access Protocols:

Many algorithmic variations are possible for channel access. The following is a short list -ALOHA -Carrier Sense Multiple Access Protocols -Collision-Free Protocols -Wireless LAN Protocols In the information given above, the main questions that were answered are: What is media access control, functions of Media Access Control and what is true regarding media access control sublayer and names of multiple access protocols or media access control protocols.

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