IP Addressing Quiz

[juba]

You are given a network address of 172.16.0.0/16. Your manager asked you to create 13 sub networks with the capability of hosting 3456 devices on each network. The information is needed in 1 hour; you are at a location where you don’t have access to a computer or a binary calculator; only pen and paper.

How would complete this task. List the all subnets and their subnet mask, IP address range and broadcast address.

[juba]

No taker??????????????

[juba]

I put this out about 10 months ago. Anyone willing to try?

[TJRAK]

You are given a network address of 172.16.0.0/16. Your manager asked you to create 13 sub networks with the capability of hosting 3456 devices on each network. The information is needed in 1 hour; you are at a location where you don’t have access to a computer or a binary calculator; only pen and paper.

How would complete this task. List the all subnets and their subnet mask, IP address range and broadcast address.

Let me give it a try.

Ok, you need 13 subnets so we're going to borrow 4 bits from the available
16 for networks which leaves us with 12 bits for Hosts.

we know that 2^10 is 1024 => 2^12 = (2^10)*4 => 4096 (more than enough host)

We borrowed 4 bits for the subnets so the increment will be 16

New SM => 172.16.0.0/20

first five network

    Subnets            Network Range             Broadcast
172.16.16.0 => 172.16.16.1 - 172.16.31.254 => 172.16.31.255
172.16.32.0 => 172.16.32.1 - 172.16.47.254 => 172.16.47.255
172.16.48.0 => 172.16.48.1 - 172.16.63.254 => 172.16.63.255
172.16.64.0 => 172.16.64.1 - 172.16.79.254 => 172.16.79.255
172.16.80.0 => 172.16.80.1 - 172.16.95.254 => 172.16.95.255
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P.S. I'm pretty new to this stuff so correct me if I'm wrong. Just had a little time on my hand, plus I need the practice

[Billerg]

Here goes:

• 172.16.00010000.00000000 / 20
o Range – 172.16.16.1/20 to 172.16.31.254
o Broadcast – 172.16.31.255
• 172.16.00100000.00000000 / 20
o Range – 172.16.32.1/20 to 172.16.47.254
o Broadcast – 172.16.47.255
• 172.16.00110000.00000000 / 20
o Range – 172.16.48.1/20 to 172.16.63.254
o Broadcast – 172.16.63.255
• 172.16.01000000.00000000 / 20
o Range – 172.16.64.1/20 to 172.16.89.254
o Broadcast – 172.16.63.255
• 172.16.01010000.00000000 / 20
o Range – 172.16.80.1/20 to 172.16.95.254
o Broadcast – 172.16.95.255
• 172.16.01100000.00000000 / 20
o Range – 172.16.96.1/20 to 172.16.111.254
o Broadcast – 172.16.111.255
• 172.16.01110000.00000000 / 20
o Range – 172.16.112.1/20 to 172.16.127.254
o Broadcast – 172.16.127.255
• 172.16.10000000.00000000 / 20
o Range – 172.16.128.1/20 to 172.16.143.254
o Broadcast – 172.16.143.255
• 172.16.10010000.00000000 / 20
o Range – 172.16.144.1/20 to 172.16.159.254
o Broadcast – 172.16.159.255
• 172.16.10100000.00000000 / 20
o Range – 172.16.160.1/20 to 172.16.175.254
o Broadcast – 172.16.175.255
• 172.16.10110000.00000000 / 20
o Range – 172.16.176.1/20 to 172.16.191.254
o Broadcast – 172.16.191.255
• 172.16.11000000.00000000 / 20
o Range – 172.16.192.1/20 to 172.16.207.254
o Broadcast – 172.16.207.255
• 172.16.11010000.00000000 / 20
o Range – 172.16.208.1/20 to 172.16.223.254
o Broadcast – 172.16.223.255

[pogi_2nr]

lol this sounds like a CCNA question.

[Billerg]

sry there was an error in my submission earlier which I just saw; the 4th subnet should be
172.16.01000000.00000000 / 20

• Range – 172.16.64.1/20 to 172.16.79.254
• Broadcast – 172.16.63.255

[juba]

lol this sounds like a CCNA question.

Actually, this was a real world situation, I was in the airport when I got the call to subnet the network before I got to the meeting which I was on my way to.

@billerg
How did you get to those subnets.

[Billerg]

How did you get to those subnets.

sry i missed this juba but are you referring to the workout?

[Ropy]

Hey juba, can you post another subnet Q?