... 802.1p field (referred to as class of service or CoS), which is part of the 802.1Q tag• At Layer 3 using the 3 bits of DSCP field in the type of service (ToS) byte of the IP headerClassification ... UpstreamThe other end of the conversation may reside in a branch office. That branch office could have any Ethernet switch. Once again, of course, it can't be a hub, but in this case that switch ... Cisco Systems, Inc. Campus Quality of Service© 2000, Cisco Systems, Inc. 10Assuming that this Layer 2 device either didn’t have the capability to do this classification or you chose not...