Day 12-15 | Subnetting

A direct, dedicated connection between two routers is called a […] network.

point-to-point

What does CIDR stand for?

Classless Inter-Domain Routing

What system replaced the classful IPv4 addressing system?

CIDR

When a classful network is split into several smaller networks, the smaller networks are called…

subnetworks  /  subnets

What is the formula to determine the number of USABLE addresses in a network?

2ⁿ - 2 = usable addresses

(n = number of host bits)

What is the dotted decimal equivalent of a /25 prefix length?

255.255.255.128

What is the dotted decimal equivalent of a /26 prefix length?

255.255.255.192

What is the dotted decimal equivalent of a /27 prefix length?

255.255.255.224

What is the dotted decimal equivalent of a /28 prefix length?

255.255.255.240

What is the dotted decimal equivalent of a /29 prefix length?

255.255.255.248

What is the dotted decimal equivalent of a /30 prefix length?

255.255.255.252

What is the dotted decimal equivalent of a /31 prefix length?

255.255.255.254

What is the dotted decimal equivalent of a /32 prefix length?

255.255.255.255

A subnet mask of 255.255.255.128 is equivalent to /[…]

25

A subnet mask of 255.255.255.192 is equivalent to /[…]

26

A subnet mask of 255.255.255.224 is equivalent to /[…]

27

A subnet mask of 255.255.255.240 is equivalent to /[…]

28

A subnet mask of 255.255.255.248 is equivalent to /[…]

29

A subnet mask of 255.255.255.252 is equivalent to /[…]

30

A subnet mask of 255.255.255.254 is equivalent to /[…]

31

A subnet mask of 255.255.255.255 is equivalent to /[…]

32