Which two addresses are valid address-book entries?
Junos security address-book entries must be specified using standard CIDR notation -- an IPv4 address followed by a slash and a prefix length (for example, 203.150.108.10/24) -- not a dotted-decimal subnet mask appended after a slash. Entries written as address/dotted-mask are invalid syntax, and a mask such as 255.255.0.255 is not even a valid contiguous subnet mask. Both 203.150.108.10/24 and 191.168.203.0/24 use correct CIDR notation and are therefore valid address-book entries.
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