How do I calculate ip adresses and subnets

[TheMidnightNarwhal]

I'm having a hard time figuring this out.

 

How do I calculate this.

140.0.X.X   /19

Range: 6

[DXMember]

http://www.subnet-calculator.com/

[TheMidnightNarwhal]

http://www.subnet-calculator.com/

 

1. You can't input the Xs .

2. You can't use that for the exam. 

3. I need to learn how to do the steps to do it.

[DXMember]

1. You can't input the Xs .

2. You can't use that for the exam. 

3. I need to learn how to do the steps to do it.

1. wtf you're talking about? what Xs???

2. lel

3. look at your lecture conspects

[TheMidnightNarwhal]

1. wtf you're talking about? what Xs???

2. lel

3. look at your lecture conspects

1.  140.0.X.X   /19

3. If I have to ask on a forum for help it's because I don't have my notes.

[DXMember]

1.  140.0.X.X   /19

3. If I have to ask on a forum for help it's because I don't have my notes.

1. It proivides you with all the information that you need

3. too sad, should've paid more attention in class, don't you have frieds that might have had the notes? Look it up on the internet yourself

[Skummel]

Subnetting isn't that hard.

 

2 things you need to remember.

 

1. IPv4 is a 32 bit  adress

2. the /19 means that the first 19 bits is static. the last 13 is the adresses you can assign.

 

The rest you would have to read up on. The wikipedia article about subnetting isn't a bad place to start.

[MeshFile]

From Cisco: http://www.cisco.com/c/en/us/support/docs/ip/routing-information-protocol-rip/13788-3.html

 

You can use different styles depending on what you like.

[leadeater]

I'm having a hard time figuring this out.

 

How do I calculate this.

140.0.X.X   /19

Range: 6

 

You need to convert the decimal numbers in the 4 octets to binary for the IP address and the subnet mask then do bit comparison to figure out the network address and broadcast address. I'll give you two examples so you can figure out your one on your own, one simple and one with the same subnet mask as yours.

 

As for how to do it, each 1 for the subnet mask means the IP bit stays the same but for each 0 you change the IP bit to a 0.

 

Example #1:

 

Address:           172.16.1.0            10101100.00010000.00000001.00000000

Subnet mask:  255.255.0.0          11111111.11111111.00000000.00000000

 

Network address: 172.16.0.0

Broadcast address: 172.16.255.255

Host Range: 172.16.0.1 - 172.16.255.254

 

Example #2:

 

Address:    192.168.38.1            11000000.10101000.00100110.00000001

Netmask:   255.255.224.0         11111111.11111111.11100000.00000000

 

Network:    192.168.32.0            11000000.10101000.00100000.00000000

Broadcast: 192.168.63.255        11000000.10101000.00111111.11111111

Host Range: 192.168.32 - 192.168.63.254

 

If you have any problems let us know, if you can't get the answer on your own I can give it but best to really give it a good go else you won't retain the information.