QuestionQ26

Junos OS Security Objects

Which two addresses are valid address-book entries?

Choose two
  • A 173.145.5.21/255.255.255.0
  • B 153.146.0.145/255.255.0.255
  • C 203.150.108.10/24
  • D 191.168.203.0/24
Explanation

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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