H12-821-v1-284-前缀列表(IP-Prefx)的命令格式为ip ip-prefx ip-prefix-name [ index index-mnumber ] permit / deny] ipv4-address mask-length [ greater-equal greater-equal-value ] [ less-equal less-equalvalue ],如果仅指定了greater-equal未指定less-equal,则前缀范围为:

前缀列表(IP-Prefx)的命令格式为ip ip-prefx ip-prefix-name [ index index-mnumber ] permit / deny] ipv4-address mask-length [ greater-equal greater-equal-value ] [ less-equal less-equalvalue ],如果仅指定了greater-equal未指定less-equal,则前缀范围为:
A[0. greater-equal-value] B无限制
C[mask-length,greater-equal-value] D[greater-equal-value.32]

参考答案：D