What is the number of addresses in the block containing the IP address 208.34.54.76/25?Select one:10125128126

To determine the number of addresses in the block containing the IP address 208.34.54.76/25, we need to understand the concept of subnetting.

1. The IP address 208.34.54.76 is a specific address within a larger block of addresses.
2. The "/25" at the end of the IP address represents the subnet mask, which determines the size of the block.
3. In binary, the subnet mask 255.255.255.128 is represented as 11111111.11111111.11111111.10000000.
4. The subnet mask has 25 bits set to 1, which means the block has 25 network bits and 7 host bits.
5. The formula to calculate the number of addresses in a block is 2^(number of host bits).
6. In this case, 2^7 equals 128.
7. However, we need to subtract 2 from the total number of addresses because the first and last addresses in the block are reserved for network and broadcast addresses, respectively.
8. Therefore, the number of addresses in the block containing the IP address 208.34.54.76/25 is 128 - 2 = 126.

So, the correct answer is 126.