单选题In network that support VLSM, which network mask should be used for point-to-point WAN links in order to reduce waste of IP addresses?（）A/24B/30C/27D/26E/32
单选题
In network that support VLSM, which network mask should be used for point-to-point WAN links in order to reduce waste of IP addresses?（）
A
/24
B
/30
C
/27
D
/26
E
/32
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