Q10. An isp is granted a block of addresses starting with 150.80.0.0/16. The isp wants to distribute these blocks to 2600 customers as follows:
a. The first group has 200 medium-size businesses; each needs approximately 128 addresses.
b. The second group has 400 small businesses; each needs approximately 16 addresses.
c. The third group has 2000 households; each needs 4 addresses.
d. Design the subblocks and give the slash notation for each subblock. Find out how many addresses are still available after these allocations.
Answers
Answer:
Business is the activity of making one's living or making money by producing or buying and selling products (such as goods and services). Simply put, it is "any activity or enterprise entered into for profit.
Answer:
a. For 128 addresses we use /25 mask. 255.255.255.128Group 1 has 200 medium size businesses150.80.0.0 /25 Subnet 1
150.80.0.128 /25 Subnet 2
150.80.1.0 /25….150.80.1.128 /25 Subnet 3
……..Subnet 100
--->150.80.99.128 /25 upto 150.80.99.255
Next address is 150.80.100.0
b. Group 2 has 400 small businesses, each needs 16 addresses…..we use /28 mask or 255.255.255.240150.80.100.0 /28 Subnet 1
150.80.100.16 /28 Subnet 2
150.80.100.240 /28 Subnet 16
…………150.80.124.240 /28 Subnet 400 [400/16=25]
Next address is 150.80.125.0
c. Group 3 has 2000 households each needs 4 addresses.For 4 addresses we use /30 mask or
255.255.255.252150.80.125.0 /30 Subnet 1
150.80.125.4 /30 Subnet 2
150.80.125.252 /30 Subnet 64
150.80.155.252 /30 Subnet 1984
31*64=1984
150.80.156.0 /30 Subnet 1985
150.80.156.60 /30 Subnet 2000
Next address available from 150.80.156.64
We have used 40000 addresses out of 65536 addresses. 25536 addresses remain available.
5.6 years ago by teamques10 ★ 33k
a. For 128 addresses we use /25 mask. 255.255.255.128
Group 1 has 200 medium size businesses
150.80.0.0 /25......150.80.0.127/25 Subnet 1
150.80.0.128 /25....150.80.0.255 /25 Subnet 2
150.80.1.0 /25….150.80.1.128 /25 Subnet 3
……..Subnet 200
--->150.80.99.128 /25 upto 150.80.99.255
Next address is 150.80.100.0
b. Group 2 has 400 small businesses, each needs 16 addresses…..we use /28 mask or 255.255.255.240150.80.100.0 /28 Subnet 1
150.80.100.16 /28 Subnet 2
150.80.100.240 /28 Subnet 16
…………150.80.124.255 /28 Subnet 400 [400/16=25]
Next address is 150.80.125.0
c. Group 3 has 2000 households each needs 4 addresses.For 4 addresses we use /30 mask or
255.255.255.252150.80.125.0 /30 Subnet 1
150.80.125.4 /30 Subnet 2
150.80.125.252 /30 Subnet 64
150.80.155.252 /30 Subnet 1984
31*64=1984
150.80.156.0 /30 Subnet 1985
150.80.156.64/30 Subnet 2000
We have used 40000 addresses out of 65536 addresses. 25536 addresses remain available.