What’s Subnet Mask

Subnet mask is another Parameter to specify the IP Address page, together with the number of Subnet mask is helping to identify which sections within a number IP Address and Network Address Host Address any number so you’ll notice that when We identified IP Address on the computer, Rss. We need to specify the Subnet mask with every

Default Subnet mask of the bridge each Class

• Class A Subnet mask is 255.0.0.0 or a binary digit of Industries. 
  11111111.00000000.00000000.00000000. 
  (Including the number 1 will be equal to 255)
• Class B is 255.255.0.0 Subnet mask is a binary digit or the Industry.
  11111111.11111111.00000000.00000000.
• Class C is a Subnet mask 255.255.255.0. Industries, or binary digit. 
  11111111.11111111.11111111.00000000.

Reaching this point, I want you to note that “the position? Bit number in IP Address that has been earmarked as the Network Address or Subnet Address is a Bit of the corresponding position in the Subnet mask is always 1.

Basic principles of the Subnet. 

Working principle is that we must borrow bit of the position originally was used as the Host Address Sub-network Address by Edit Subnet mask to the appropriate new value. 

Formula 2 calculates the square n – 2 =?

Planning calculations Subnet

1. Quantify Segment Subnet address all requirements in the Segment number in this count ??? the network in each of the side of the Router or switch Layer 3, or if it is to implement VLAN’s VLAN count.
2. Total number of computer devices in each Segment (here we suppose That the number of ??????. A similar amount).
3. Quantify the bit to lend a Subnet Address based on the .1 and .2 based on the simple formula, if the amount borrowed if the x bit then take the square with 2 x 2 and then subtract out again. is greater than or equal to the number of Subnet address we want. 
   The later is a bit of borrowing from the rest. Formula 2 was to prepare n -2 =??
4. The subnet mask to be calculated with the same number for a Network Address Subnet Address all possible. To be assigned to each Network Segment.
5. IP Address numbers calculated all possible in each Subnet, set to a server on the computer and each router until the interface.

Example Calculation

Network Address  192.168.100.0
Subnetmask        255.255.255.192 (/26)

• How many have subnet ?
  • Borrowing is a bit 2. 
    255.255.255.11000000. 
    Bridge is the subnet number is 2 square 2 – 2 = 2 subnet.
• How many have Host ?
  • Bit by borrowing from the rest is above 6. 
    Formula is used to prepare 2 different 6 – 2 = 62 host <<to be used with 1 circle network.
• Subnet number that number is correct???
  • First Subnet 192.168.100.0 1 000000 192.168.100.64. 
    Two Subnet 192.168.100. 1 0 000000 192.168.100.128.
• Host numbers are in each subnet?
  • Subnet first 192.168.100.64. 
    Available 192.168.100.65 – 192.168.100.126. 

    Last Subnet 192.168.100.128. 
    Available 192.168.100.129 – 192.168.100.190.

Relate Link : IP Protocol VLAN