A.A Smart VLAN can contain multiple uplink ports and multiple service virtual ports

B.Smart VLAN is mainly used to distinguish users, each user has a VLAN.

C.There are two types of ports: uplink port and service virtual port

D.Under the same VLAN, the service flow between service virtual ports can be used for Layer 2 intercommunication

A.Reduce the processing time of intermediate nodes and support high-speed transmission

B.Working in the network layer of the OSI model

C.Support fixed-length exchange

D.Can guarantee the quality of service performance index (QOS) of various businesses

A.None of the above

B.H801ETHB supports Ethernet cascading and Ethernet uplink

C.H801ETHA supports Ethernet cascading and Ethernet uplink

D.Both H801ETHA and H801ETHB support Ethernet cascading and Ethernet uplink

A.Check the ATM package format of MODEM

B.Confirm whether the MODEM configuration is correct

C.Query the traffic of the xDSL port to determine whether there is normal business traffic with the terminal

D.Confirm whether the gateway can be pinged from the client

A.1024

B.255

C.1023

D.256