Which IP configuration does the CIDR notation 192.168.1.1/25 refer?
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A. B. C. D. E.D
CIDR (Classless Inter-Domain Routing) notation is used to describe network prefixes in IP addressing. It is used to represent a range of IP addresses by specifying the network prefix and the number of significant bits in the subnet mask.
In the CIDR notation 192.168.1.1/25, the IP address 192.168.1.1 is the network address, and the /25 represents the number of bits in the subnet mask that are set to 1, indicating the network portion of the IP address.
To determine the subnet mask, you start with 32 bits (the length of an IPv4 address) and subtract the number of bits represented by the CIDR notation. In this case, 32 - 25 = 7, so the subnet mask is 255.255.255.128.
Therefore, the correct answer is D. 192.168.1.1 255.255.255.128.
To validate this answer, you can perform a bitwise AND operation on the IP address and the subnet mask to get the network address:
192.168.1.1 AND 255.255.255