snap header การใช้

This issue, known as snapped or snap headers, leads to walls which need to be repaired either by rebuilding or by fitting various types of proprietary tie.
With certain IVs, an SNAP header, an attacker can assume he can derive the first byte of the keystream from " B " ?" 0x " AA ".
This could also be applied to 802.3 frames ( length / ethertype field = > length ), with or without an LLC ( i . e . Logical Link Control ), LLC + SNAP header.
On other network types, the LLC and SNAP headers are required in order to multiplex different protocols on the link layer, as the MAC layer doesn't itself have an EtherType field, so there's no alternative framing that would have a larger available payload.
On Ethernet, the 8 octets occupied by the LLC and SNAP headers reduce the size of the available payload for protocols such as the Internet Protocol to 1492 bytes, compared to the use of the Ethernet II framing; therefore, for protocols that have EtherType values, packets are usually transmitted with Ethernet II headers rather than with LLC and SNAP headers.