nub subnetting question
VAHokie56
Member Posts: 783
in CCNA & CCENT
Hey guys quick question..
I am working on sub netting faster and using subnettingquestions.com. My question...is there a faster way of solving this problem instead of going threw ALL the network address jumping by 4 each time to find the network address for the ip in question??? Currently I am looking at .0 to .4 to .8 to .16 and so on but it will take forever to get to the correct network address! any advise would be awesome. See the original problem below
Question: What is the broadcast address of the network 192.168.99.224/30?
I am working on sub netting faster and using subnettingquestions.com. My question...is there a faster way of solving this problem instead of going threw ALL the network address jumping by 4 each time to find the network address for the ip in question??? Currently I am looking at .0 to .4 to .8 to .16 and so on but it will take forever to get to the correct network address! any advise would be awesome. See the original problem below
Question: What is the broadcast address of the network 192.168.99.224/30?
.ιlι..ιlι.
CISCO
"A flute without holes, is not a flute. A donut without a hole, is a Danish" - Ty Webb
Reading:NX-OS and Cisco Nexus Switching: Next-Generation Data Center Architectures
CISCO
"A flute without holes, is not a flute. A donut without a hole, is a Danish" - Ty Webb
Reading:NX-OS and Cisco Nexus Switching: Next-Generation Data Center Architectures
Comments
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jmc012 Member Posts: 134Hey guys quick question..
I am working on sub netting faster and using subnettingquestions.com. My question...is there a faster way of solving this problem instead of going threw ALL the network address jumping by 4 each time to find the network address for the ip in question??? Currently I am looking at .0 to .4 to .8 to .16 and so on but it will take forever to get to the correct network address! any advise would be awesome. See the original problem below
Question: What is the broadcast address of the network 192.168.99.224/30?
It's giving you the network address .224, a /30 is an increment of 4 so add 4 to 224 and subtract one to get the broadcast address. -
mella060 Member Posts: 198 ■■■□□□□□□□A quick way to work out the answer is to find the increment / block size, what octet it is in and you are good to go.
A /30 means you have an increment of 4 in the final octet. So you know your subnets are going to go up by 4 in the last octet.
0...4...8...12...16...20...so you know that it is going to stay that way right up to 256
24...28...32...36...40
44...48...52...56...60...and so on
200...204...208...212...216...220...224...228
So you know that 192.168.99.224 /30 includes the following:
Valid host range: .225 -226
Broadcast Address: .227
Next subnet is 192.168.99.228 /30
After yoo do it for a while, this takes around 10 seconds to work out in your head. -
abefroman Banned Posts: 278Question: What is the broadcast address of the network 192.168.99.224/30?
Here is how I do it.
A /30 is 4 ips, so to make it easy count by 40's
40
80
120
160
200
240
240 was too high so go back, and count by 4.
220
224
228
-1
192.168.99.227 is your broadcast -
VAHokie56 Member Posts: 783Thanks for all the quick replies. I guess I did not realize they where actually giving me the network addy from that start...my brain is running on like 6 purple mountain dews right now. Thanks again!.ιlι..ιlι.
CISCO
"A flute without holes, is not a flute. A donut without a hole, is a Danish" - Ty Webb
Reading:NX-OS and Cisco Nexus Switching: Next-Generation Data Center Architectures