The ip ip-prefix ip-prefix-name [ index index-number ] { permit | deny } ipv4-address mask-length [ greater-equal greater-equal-value ] [ less-equal less-equal-value ] command is used to configure an IP-prefix-filter.
If less-equal is specified but greater-equal is not, what is the prefix range?
A . [0, less-equal-value]
B . [mask-length, less-equal-value]
C . [less-equal-value, 32]
D . Not limited
Answer: B