Hot Downloads

×

Notice

The forum is in read only mode.
Welcome, Guest
Username: Password: Remember me
  • Page:
  • 1

TOPIC: Calculating sub netmask

Calculating sub netmask 13 years 11 months ago #4702

  • apit
  • apit's Avatar Topic Author
  • Offline
  • Senior Member
  • Senior Member
  • Posts: 227
  • Thank you received: 0
what is different calculation for subnetmask 255.255.255.192, 255.255.255.254 etc?i have read your artical but not really understand.can u give more explanation for that?

Re: Calculating sub netmask 13 years 11 months ago #4725

Not sure what you mean by different caculation. I assume your talking about wild card masks which is the opposite of subnets. And are used in Access Lists or OSPF network statements I think Eigrp also cant remember. But the opposite of 255.255.255.192 would be 0.0.0.63. I may be way off here but i think thats what you need. I think of it this way 255 is the MAX number per octect. So if you need the opposite you take what ever number in that octect and subtract 255 so 255 - 255 = 0 so... 0.0.0. would make the first 3 octets(sp?) so the last number 192 - 255 = 63 makeing 0.0.0.63.

Hope that helps

Re: Calculating sub netmask 13 years 10 months ago #4978

  • apit
  • apit's Avatar Topic Author
  • Offline
  • Senior Member
  • Senior Member
  • Posts: 227
  • Thank you received: 0
so when we use sub net 255.255.255.192, what is the range of ip that can exist within this network?

Re: Calculating sub netmask 13 years 10 months ago #4983

so when we use sub net 255.255.255.192, what is the range of ip that can exist within this network?


--24 bits in the first 3 octets and the first 2 bits from the last octed from the left for the Networks and 6 bits in the last octet for the hosts. Figure the IP's.
  • Page:
  • 1
Time to create page: 0.142 seconds

CCENT/CCNA

Cisco Routers

  • SSL WebVPN
  • Securing Routers
  • Policy Based Routing
  • Router on-a-Stick

VPN Security

  • Understand DMVPN
  • GRE/IPSec Configuration
  • Site-to-Site IPSec VPN
  • IPSec Modes

Cisco Help

  • VPN Client Windows 8
  • VPN Client Windows 7
  • CCP Display Problem
  • Cisco Support App.

Windows 2012

  • New Features
  • Licensing
  • Hyper-V / VDI
  • Install Hyper-V

Linux

  • File Permissions
  • Webmin
  • Groups - Users
  • Samba Setup