1019 B
Midterm Sample Questions
Difference between NAS and SAN?
Subnet:
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What kind of class is the given IP?
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What is the subnet mask, network address, etc?
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Subnet addresses?
Host & subnet mask(classless)
BTW: this is the analog of the network address(classful addressing). When we talk about network addresses we are implying a classful network.
- Subnet bits
i.e. 21 => 8+8+5+0 <= 5 is the odd one out so we have 5 subnet bits
- VLSM - Variable Length Subnet Mask
Suppose we want to assign addresses to the following networks with x many hosts. A:600; B:1000; C:200
150.180.0.0/16
150.181.0.0/16
Start with the largest network B : requires 1000 hosts.
Hosts part requires 10 bits so we have an IP/22.
Network address then is (subnet address)150.180.0.0/22 - (broadcast address)150.180.3.231/22. NOTE: we don't go up to to 255 on the end because:
A. We only need 1000 hosts B. We effectively "reuse" the 150.180 prefix to fit the next network; basically we use a "host" as a network.