以太网帧的2种格式（国外英文资料）.docVIP

以太网帧的2种格式（国外英文资料） Ethernet frames and ieee 802.3 frames Classification: protocol 2009-11-04 17:50, 1258 people who read reviews (0) collect reports Headeraccessapple sapcisco network /questionhtml /wzw200/archive/2009/07/23/4373056.aspx Talk about Ethernet frames The development of an Ethernet frame format 1980 DEC, Intel, Xerox set the standard for Ethernet I In 1982 DEC, Intel and Xerox set the standard for Ehternet II IEEE began studying Ethernets international standard, 802.3, in 1982 The eager Novell in 1983 developed a dedicated Ethernet frame format based on the original version of IEEE 802.3 When IEEE introduced the IEEE 802.3 specification in 1985, it later addressed the compatibility issues of EthernetII and 802.3 frame formats, Launch the eclectic Ethernet SNAP format (the early Ethernet I was completely replaced by other frame formats, so now Ethernet can only see the next several Ethernet frames. Most web devices now support the format of these Ethernet frames, For example, when ciscos router resets the Ethernet interface, you can specify a different frame format for Ethernet: ARPA, SAP, snap, novell-ether. Two. Various frame formats The frame format is described below 1. The Ethernet II The DIX Ethernet alliance... It has six bytes of destination MAC address, six bytes of source MAC address, The type domain of two bytes (for marking the type of data wrapped in this Frame, inside), and above is the Frame Header, Next up is 46-1500 bytes of data, and 4 bytes of frame validation Novell Ethernet is 2. Its frame head is different from the Ethernet and the type field in the EthernetII frame is a length domain, The next two bytes are 0xFFFF, which is used to indicate the Frame of the Novell Ether type, Because the previous 0xFFFF has dropped two bytes, the data domain is reduced to 44-1498 bytes, and the frame check is the same. 3. IEEE 802.3/802.2 The Frame Header of 802.3 is different from the Frame Header of the Ethernet II, and the EthernetII ty