ISL - has some of the following which im aware of:
- Has 30 byte encapsulation
- 26 byte header
- 4 byte cyclic redundancy check or FSC
- 3 COS bit filed used for (class of service) - is this related to VOIP?
Does 802.1p - which states the following:
Made up of 4 headers
- Ethertype: 0x8100
- 802.1P: 3 COS bits used for QOS Marking - is this referring to VOIP? & as ISL is more superior than 802.1q how come QOS Markings is NOT included in ISL?
- Token ring flag: 1 bit
- Vlan id: 12 bits (1-4094 range for vlans)
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