Are you studying for the CCNA certification?
Skillset can help you prepare! Sign up for your free Skillset account and take the first steps towards your certification.
Skillset can help you prepare! Sign up for your free Skillset account and take the first steps towards your certification.
Given a Class A IP address subnetted with a /26 subnet mask, how many usable host IP addresses are available for each subnet?
262,144
62
30
254
1
4094
The subnet class A 255.255.255.192 (/26) can give a large amount of subnets but fewer hosts. Because there are 18 bits ON (1) (counting from the second octet), in 255.255.255.192 (11111111.11111111.11111111.11000000) the number of subnets is 218 = 262,144. However the question is not the number of subnets, but the number of usable IP addresses that can be configured on hosts. The bits OFF (0) represent the number of valid hosts, therefore 26 -2 = 62 (-2 is because the subnet and the broadcast are not usable IP addresses, so they need to be subtracted).
Study thousands of practice questions that organized by skills and ranked by difficulty.
Create a tailored training plan based on the knowledge you already possess.
Know when you’re ready for the high-stakes exam. Have the confidence that you will pass on your first attempt.