What is the IEEE MAC sublayer?

The 802.11 MAC sublayer provides an abstraction of the physical layer to the logical link control sublayer and upper layers of the OSI network. It is responsible for encapsulating frames and describing frame formats.

What are the differences between the MAC sublayer and LLC sublayer?

The LLC sublayer communicates with the network layer while the MAC sublayer allows various network access technologies. For instance, the MAC sublayer communicates with Ethernet LAN technology to send and receive frames over copper or fibre-optic cable.

What is Ethernet MAC sublayer?

The MAC sublayer acts as an interface between the logical link control (LLC) Ethernet sublayer and Layer 1 (the physical layer). The MAC sublayer emulates a full-duplex logical communication channel in a multipoint network. This channel may provide unicast, multicast, or broadcast communication service.

What is the function of MAC sublayer?

The medium access control (MAC) is a sublayer of the data link layer of the open system interconnections (OSI) reference model for data transmission. It is responsible for flow control and multiplexing for transmission medium. It controls the transmission of data packets via remotely shared channels.

What is the size of MAC address?

The IEEE 802 MAC address originally comes from the Xerox Network Systems Ethernet addressing scheme. This 48-bit address space contains potentially 248 (over 281 trillion) possible MAC addresses. The IEEE manages allocation of MAC addresses, originally known as MAC-48 and which it now refers to as EUI-48 identifiers.

Which two functions are performed at the MAC sublayer of the OSI data link?

Functions performed in the MAC sublayer Frame delimiting and recognition. Addressing of destination stations (both as individual stations and as groups of stations) Conveyance of source-station addressing information. Transparent data transfer of LLC PDUs, or of equivalent information in the Ethernet sublayer.

Is Ethernet a layer 1 or 2?

How Ethernet works. IEEE specifies in the family of standards called IEEE 802.3 that the Ethernet protocol touches both Layer 1 (physical layer) and Layer 2 (data link layer) on the Open Systems Interconnection (OSI) network protocol model. Ethernet defines two units of transmission: packet and frame.

What is data link layer responsible for?

The data link layer is responsible for multiplexing data streams, data frame detection, medium access, and error control. It ensures reliable point-to-point and point-to-multipoint connections in a communication network.

What does MAC address tell you?

MAC Address or media access control address is a unique ID assigned to network interface cards (NICs). It is also known as a physical or hardware address. It identifies the hardware manufacturer and is used for network communication between devices in a network segment.

What is the size of MAC address * 2 points?

MAC Address is a unique 6-byte (48-bit) address that is usually permanently burned into a network interface card (NIC) or other physical-layer networking device and that uniquely identifies the device on an Ethernet-based network.

What are the LLC and Mac sublayers in data link layer?

LLC (Logical Link Control) and MAC (Media Access Control) sublayers. In the previous lesson we laid the ground for a deeper coming explanation to the Data Link Layer. And it is important to point out that this layer acts as a connecting layer between the software processes of the above layers and the hardware of the Physical Layer.

What should data look like at data link layer?

At the data link layer, Ethernet specifies what the data should look like, including the header and trailer. The protocol is defined by IEEE 802.3 and divides the data link layer into two sublayers: the Logical Link Control (LLC) sublayer and the Media Access Control (MAC) sublayer.

Which is the uppermost sublayer of the data link layer?

The uppermost sublayer, LLC, multiplexes protocols running at the top of data link layer, and optionally provides flow control, acknowledgment, and error notification.

What is the role of the MAC sublayer?

Media Access Control (MAC) sublayer provides control for accessing the transmission medium. It is responsible for moving data packets from one network interface card (NIC) to another, across a shared transmission medium. Physical addressing is handled at the MAC sublayer.