A network engineer must configure an interface with IP address 10.10.10.145 and a subnet mask equivalent to 11111111.11111111.11111111.11111000. Which subnet mask must the engineer use?
A network engineer must configure an interface with IP address 10.10.10.145 and a subnet mask equivalent to 11111111.11111111.11111111.11111000. Which subnet mask must the engineer use?
The subnet mask provided in the question is written in binary as 11111111.11111111.11111111.11111000. This binary sequence has 29 bits set to 1, which corresponds to the subnet mask /29 in CIDR notation.
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Correct
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/29 just calculate or add the number of bits
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A. /29
If it’s not obvious enough just count the ones in the last octed
Correct
The subnet mask equivalent to 11111111.11111111.11111111.11111000 in dotted decimal notation is 255.255.255.248. To determine the appropriate subnet mask for the given IP address and subnet mask, we need to identify the number of bits in the network portion of the address. In this case, the first 29 bits of the IP address are used for the network portion, and the remaining 3 bits are used for the host portion. Therefore, the correct subnet mask is /29.