Which two addresses are valid address book entries? (Choose two.)
Which two addresses are valid address book entries? (Choose two.)
For an address book entry to be valid, it typically needs to be in CIDR notation, which combines the IP address and a subnet mask expressed as a suffix length (e.g., /24). 173.145.5.21/255.255.255.0 and 153.146.0.145/255.255.0.255 are not in the correct notation, with the latter also having an invalid mask. 203.150.108.10/24 and 191.168.203.0/24 are both valid addresses because they correctly use CIDR notation.
B - That's how you configure 'WildCard' address. D - Valid /24 address.
A,D correct answer
why b and d?
the two valid address book entries are: C. 203.150.108.10/24 D. 191.168.203.0/24 A. 173.145.5.21/255.255.255.0: This is a mix of an IP address and a subnet mask, but in a format that's not typically used for address book entries. Address book entries usually use CIDR notation, not a combination of an IP address and a traditional subnet mask. B. 153.146.0.145/255.255.0.255: This option is invalid because the part after the slash is supposed to be a subnet mask in CIDR notation (which is a number between 0 and 32 for IPv4), but "255.255.0.255" is not a valid subnet mask in any format. C. 203.150.108.10/24: This is a valid address book entry. It uses CIDR notation, where "/24" indicates the subnet mask (255.255.255.0 in traditional format), and "203.150.108.10" is the IP address. D. 191.168.203.0/24: This is also a valid address book entry. Here, "/24" is the CIDR notation for the subnet mask, and "191.168.203.0" is the network address.
some one explain please just did this on my srx with the slash / they are not valid set address 173.145.5.21/255.255.255.0 set address 153.146.0.145/255.255.0.255 a space in between prefix and mask are valid set address 173.145.5.21 255.255.55.0 set address 153.146.0.145 255.255.0.255 these two are valid and accepted in address book set address newyork 191.168.203.0/24 this is valid as well not valid set address ABCD 203.150.108.10/24 even if you type the below set address 203.150.108.10/24 203.150.108.10/24 address-book { address 173.145.5.21 255.255.255.0/32; address 153.146.0.145 255.255.0.255/32; address newyork 191.168.203.0/24; [edit security zones security-zone trust address-book] 'address 203.150.108.10/24' Invalid address entry<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<invalid
got it even though the 173.145.5.21 255.255.255.0 is accepted in the address book it shows as a /32 same goes for the 203 address