简答题 How many bits represented in DSCP？

whydoyouconfigureGREinIPV6？

问答题why do you configure GRE in IPV6？

whenyouuseLSAtype4inOSPFenvironment？

问答题when you use LSA type 4 in OSPF environment？

hyyouuseSpanning-tree？DifferencebetweenPVST&MST.

问答题hy you use Spanning-tree？ Difference between PVST & MST.