8 equal subnets using the following IP range: 205.32.16.0/24.
They have offices in 5 different locations: 1. New York with 17 workstations 2. Chicago with 15 workstations 3. Los Angeles with 20 workstations 4. Phoenix with 11 workstations 5. Boston with 22
6th site anticipated.
NOTE: There are only 6 locations, requiring 6 subnets of EQUAL size. This does NOT mean you will use the entire /24 block of addresses. In other words, there WILL be enough space for 2 more subnets (8 equal subnets total) but we WILL NOT allocate the remaining space to sites. Simply document the beginning and ending address of the unused space for the final 10 points of the project.
Here is what we know:
205.32.16.0 /24 belongs to ACME
205.32.16.x = the CURRENT Network Portion (unusable address as it defines the network beginning)
/24 means we have 256 total available addresses (explained below)
205.32.16.255 is the Broadcast IP
Resulting a USABLE IP RANGE OF 205.32.16.1 – 205.32.16.254 (254 usable hosts)
/24 defines our subnet and the total addresses we CAN use. Let’s understand subnets…
SUBNETS – Define the addresses we can USE
/24 means we are using 24 of the 32 possible bits in the subnet mask. This can be determined by this:
255.255.255.0 = 11111111.11111111.11111111.00000000 OR 8bits.8bits.8bits.0bits = 24 total bits out of 32 possible bits
Each 1 in the subnet equals a bit and each octet is a field of potentially 8 bits
Each placement of a bit indicates a numeric value. Picture the following table as one octet. Let’s see how we can make 255 as a value:
Bit value | Bit value | Bit value | Bit value | Bit value | Bit value | Bit value | Bit value | 128 How? (64x2) | 64 How? (32x2) | 32 How? (16x2) | 16 How? (8x2) | 8 How? (4x2) | 4 How? (2x2) | 2 How? (1x2) | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
