一、Ethernet Frame Types: Provan's Definitive Answer

Novell Frame Type Designation: Ethernet_II Common name: Ethernet Layout:

6 bytes       6 bytes       2 bytes         Up to 1500 bytes+-------------+-------------+-------------+-------------------------+| Destination |   Source    |    E-type   | Network Protocol Packet || MAC Address | MAC Address | (IPX: 8137) |                         |+-------------+-------------+-------------+-------------------------+

Comments:

1. Used for TCP/IP as well as many other protocols.
2. Most common frame type in general, although Ethernet_802.3 might possibly carry more packets world wide.

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Novell Frame Type Designation: Ethernet_802.3 Common name: "Raw" 802.3 Layout:

6 bytes       6 bytes       2 bytes         Up to 1500 bytes+-------------+-------------+--------------+------------------------+| Destination |   Source    | Total packet |       IPX Packet       || MAC Address | MAC Address |    length    | first two bytes: FF,FF |+-------------+-------------+--------------+------------------------+

Comments:

1. No protocol ID: Can only carry IPX packets.
2. Distinguishable from Ethernet_802.2 only because the first two bytes of all IPX packets carried on Ethernet_802.3 must be all ones, which makes no sense in Ethernet_802.2.
3. The default frame type for NetWare software until NetWare v4.0 was released.

 

二、Some examples of values in the type/length field:

0 - 1500 length field (IEEE 802.3 and/or 802.2)0x0800 IP(v4), Internet Protocol version 40x0806 ARP, Address Resolution Protocol0x8137 IPX, Internet Packet eXchange (Novell)0x86dd IPv6, Internet Protocol version 6

 

三、找到一张802.3与以太网的封装格式对比图

 

四、Ethernet VS 802.3

0.[wireshark wiki: Ethernet]

http://wiki.wireshark.org/Ethernet

1.[wikipedia: Jumbo frame]

http://en.wikipedia.org/wiki/Jumbo_frame

 

2.Ethernet Frame Types

http://telecom.tbi.net/frmlan.html

3.EtherType variable assignments

http://telecom.tbi.net/etype.html

4.Ethernet Frame Types: Provan's Definitive Answer

http://www.ee.siue.edu/~bnoble/comp/networks/frametypes.html

5.Ethernet frame

http://en.wikipedia.org/wiki/Ethernet_frame

6.Ethernet

http://en.wikipedia.org/wiki/Ethernet

 

7.802.3

http://en.wikipedia.org/wiki/IEEE_802.3

 

8.IEEE Std 802.3-2012, IEEE Standard for Ethernet

http://standards.ieee.org/about/get/802/802.3.html

http://standards.ieee.org/getieee802/download/802.3-2012.zip

 

五、本文网址[原文发布于2014-09-24 08:54]

 

 

【完结】