Encapsulation-table
A WLAN can only transfer packets in accordance with the 802.3 standard. Other encapsulation types such as Ethernet_II can be converted to 802.3 using the Subnetwork Access Protocol (SNAP) to permit them to be transferred via the WLAN. A SNAP header is added to the packet when entering the WLAN. This SNAP header is removed again when transferring to the LAN or WAN, restoring the 802.3 packet to its original Ethernet_II packet format.
Some layer-3 protocols such as AppleTalk already create a SNAP header for transfers in the LAN. In the case of packets using these protocols, care must be taken not to remove the SNAP header when transferring them from the WLAN to the LAN, as this protocol is also a precondition for the LAN. The LANCOM devices continuously observe the network traffic and check the protocols used for their encapsulation types to ensure the correct handling of the packets when transferring them from the LAN to the WLAN.
The details of the encapsulation table:
The hexadecimal identifiers for the most important layer-3 protocols as per RFC 1010:
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