subnetting

hi guys i was going through the skills intergration packet tracer exams for ccna 2 exploration chapter 11 which is ospf...and i sure need some help on this. i have subnetted the network and here is my output

requirements:
1) 6000
2)2000
3)1000
4)800
5)500
6)400
7)120

subnetworks:
1)172.16.0.0/19
2)172.16.32.0/21
3)172.16.40.0/22
4)172.16.44.0/22
5)172.16.48.0/23
6)172.16.50.0/25

point to point subnets are my major concerns here:
1) 172.16.54.0 172.16.54.1 - 172.16.54.6

2) 172.16.54.8 172.16.54.9 - 172.16.54.12

can somebody please verify my subnets

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Comments

georgemc

requirements:
1)6000
2)2000
3)1000
4)800
5)500
6)400
7)120

subnetworks:
1)172.16.0.0/19 = 6000 = 8192
2)172.16.32.0/21 = 2000 = 2048
3)172.16.40.0/22 = 1000 = 1024
4)172.16.44.0/22 = 800 = 1024
5)172.16.48.0/23 = 500 = 512
6)172.16.50.0/23 = 400 = 512
7)172.16.52.0/25 = 120 = 128

point to point subnets:
1) 172.16.52.128 172.16.54.128 - 172.16.54.131 (.129 and .130 usable)
2) 172.16.52.132 172.16.54.132 - 172.16.54.135 (.133 and .134 usable)

ranny17 wrote: »

hi guys i was going through the skills intergration packet tracer exams for ccna 2 exploration chapter 11 which is ospf...and i sure need some help on this. i have subnetted the network and here is my output

requirements:
1) 6000
2)2000
3)1000
4)800
5)500
6)400
7)120

subnetworks:
1)172.16.0.0/19
2)172.16.32.0/21
3)172.16.40.0/22
4)172.16.44.0/22
5)172.16.48.0/23
6)172.16.50.0/25

point to point subnets are my major concerns here:
1) 172.16.54.0 172.16.54.1 - 172.16.54.6

2) 172.16.54.8 172.16.54.9 - 172.16.54.12

can somebody please verify my subnets

chmorin

May be worth knowing if you couldn't grasp it from the previous post (great post, by the way), that the point to point subnets are using a /30 mask. This gives you 4 IP's, one for network address and one for broadcast. Leaving the two remaining for your point to point link.

ranny17

thanks..am really trying to sink subnetting in...but i guess i get a lot of trouble with class B networks

alan2308

Just keep practicing, you'll get it. Here's one place to go for more practice, and there are plenty more like it out there.

subnettingquestions.com