It is followed by the SFD to provide byte-level synchronization and to mark a new incoming frame. The preamble consists of a 56-bit (seven-byte) pattern of alternating 1 and 0 bits, allowing devices on the network to easily synchronize their receiver clocks, providing bit-level synchronization. This option is not illustrated here.Įthernet packet – physical layer Preamble and start frame delimiter Īn Ethernet packet starts with a seven-octet preamble and one-octet start frame delimiter (SFD). IEEE 802.1ad (Q-in-Q) allows for multiple tags in each frame. Field sizes for this option are shown in brackets in the table above. The optional 802.1Q tag consumes additional space in the frame.

Some implementations of Gigabit Ethernet and other higher-speed variants of Ethernet support larger frames, known as jumbo frames.Ĩ02.3 Ethernet packet and frame structureĮthertype ( Ethernet II) or length ( IEEE 802.3)

The table below shows the complete Ethernet packet and the frame inside, as transmitted, for the payload size up to the MTU of 1500 octets. The internal structure of an Ethernet frame is specified in IEEE 802.3. Ethernet transmits data with the most-significant octet (byte) first within each octet, however, the least-significant bit is transmitted first.

The maximum resolution is Single 4K UHD via HDMI or Mini DisplayPort or Dual 2K via HDMI & Mini DisplayPort².A data packet on the wire and the frame as its payload consist of binary data.Transfer files through built-in SD/microSD card reader. Features one Mini DisplayPort, one HDMI port, one VGA port, one USB-C port, three USB 3.0 ports, Gigabit Ethernet port and 3.5mm audio combo jack.Laptop expandability for up to 10 devices.The dock passes a maximum of 85W of power to charge laptops and tablets¹. Dock and charge up your laptop or tablet through the docking station via your manufacturer's USB-C AC power adapter (not included).Enhance your work visually by adding a single 4K monitor or dual monitors at high-definition resolutions.Compatible with most laptop computers and tablets.

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