Скачать или смотреть MCQ-114 | Understanding Wildcard Masks: What is the Wildcard Mask of 255.255.255.240?

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What is Wildcard Mask of 255.255.255.240?

The wildcard mask for the subnet mask 255.255.255.240 is 0.0.0.15.

To understand wildcard masks, it's important to know that they are used in combination with subnet masks to identify the range of IP addresses that belong to a specific subnet. While subnet masks use 1s and 0s to identify the network and host portions of an IP address, wildcard masks use 1s and 0s to identify the portion of the address that can vary.

In this case, the subnet mask 255.255.255.240 identifies a subnet with 16 IP addresses (because the last 4 bits of the fourth octet are borrowed for the subnet ID). The wildcard mask 0.0.0.15 indicates that the last 4 bits of the fourth octet can vary, allowing for a range of 16 IP addresses.

So, the network address for this subnet would be found by performing a bitwise AND operation between the subnet mask and the IP address, while the broadcast address would be found by performing a bitwise OR operation between the subnet mask and the IP address with all host bits set to 1s.


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