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ETHERNET FRAMES - Coggle Diagram
ETHERNET FRAMES
Hafiza Natasha
MAC Sublayer
Data encapsulation
Frame delimiting
Identify a group of bits that make up a frame. This process provides synchronization between the transmitting and receiving nodes.
addressing
Each Ethernet header added in the frame contains the physical address (MAC address) that enables a frame to be delivered to a destination node.
error detection
Each Ethernet frame contains a trailer with a cyclic redundancy check (CRC) of the frame contents. After reception of a frame, the receiving node creates a CRC to compare to the one in the frame. If these two CRC calculations match, the frame can be trusted to have been received without error.
Media access control
Control of frame placement on and off the media.
Media recovery.
Ethernet Evolution
Early versions of Ethernet were relatively slow at 10 Mbps.
The latest versions of Ethernet operate at 10 Gigabits per second and faster.
Ethernet Encapsulation
Ethernet is the most widely used LAN
technology today.
Ethernet operates in the data link layer and
the physical layer.
Ethernet relies on the two separate
sublayers of the data link layer to operate,
the Logical Link Control (LLC) and the MAC
sublayers.
◦ Defined in the IEEE 802.2 and 802.3 standards. ◦ It supports data bandwidths of 10 Mb/s, 100
Mb/s, 1000 Mb/s (1 Gb/s), 10,000 Mb/s (10
Gb/s), 40,000 Mb/s (40 Gb/s), and 100,000
Mb/s (100 Gb/s).
The Ethernet LLC sublayer handles the
communication between the upper layers
and the lower layers. It is implemented in
software, and its implementation is
independent of the hardware.
Ethernet Frame Fields
Frames less than 64 bytes are called a “collision fragment” or “runt frame” and
are automatically discarded by receiving stations. Frames greater than 1500 bytes
of data are considered “jumbo” or “baby giant frames”.
If the size of a transmitted frame is less than the minimum or greater than the
maximum, the receiving device drops the frame.
The minimum Ethernet
frame size from Destination
MAC address to FCS is 64
bytes and the maximum is
1518 bytes