Binary Lesson 9 Supernetting

1
Binary Lesson 9Supernetting
2
Class C

• Class C address 192.168.1.10 /24
• The subnet mask is 255.255.255.0
• The network address is 192.168.1.0
• In Binary
• IP 11000000 10101000 00000001 00001010
• Subnt Msk 11111111 11111111 11111111 00000000
• Net Addr 11000000 10101000 00000001 00000000

3
192.168.0.0 /23

• You can combine two class C's with a /23
• IP 192.168.1.10 /23
• Subnet Mask 255.255.254.0
• Network 192.168.0.0
• First Usable 192.168.0.1
• Last Usable 192.168.1.254
• IP 11000000 10101000 00000001 00001010
• Subnt Msk 11111111 11111111 11111110 00000000
• Net Addr 11000000 10101000 00000000 00000000

4
192.168.0.0 /22

• You can combine 4 class C's with a /22
• IP 192.168.1.10 /22
• Subnet Mask 255.255.252.0
• Network 192.168.0.0
• First Usable 192.168.0.1
• Last Usable 192.168.3.254
• IP 11000000 10101000 00000001 00001010
• Subnt Msk 11111111 11111111 11111100 00000000
• Net Addr 11000000 10101000 00000000 00000000

5
Subnetting a Class C

• CIDR Notation Addr Subnet Mask
  Broadcast
• 192.168.0.0/24 256 255.255.255.0
  192.168.0.255
• 192.168.0.0/25 128 255.255.255.128
  192.168.0.127
• 192.168.0.0/26 64 255.255.255.192
  192.168.0.63
• 192.168.0.0/27 32 255.255.255.224
  192.168.0.31
• 192.168.0.0/28 16 255.255.255.240
  192.168.0.15
• 192.168.0.0/29 8 255.255.255.248
  192.168.0.7
• 192.168.0.0/30 4 255.255.255.252
  192.168.0.3

6
Supernetting a Class C

• CIDR Notation Addr Subnet Mask Broadcast
  Cs
• 192.168.0.0/16 65536 255.255.0.0
  192.168.255.255 256
• 192.168.0.0/17 32768 255.255.128.0
  192.168.127.255 128
• 192.168.0.0/18 16384 255.255.192.0
  192.168.63.255 64
• 192.168.0.0/19 8192 255.255.224.0
  192.168.31.255 32
• 192.168.0.0/20 4096 255.255.240.0
  192.168.15.255 16
• 192.168.0.0/21 2048 255.255.248.0
  192.168.7.255 8
• 192.168.0.0/22 1024 255.255.252.0
  192.168.3.255 4
• 192.168.0.0/23 512 255.255.254.0
  192.168.1.255 2
• 192.168.0.0/24 256 255.255.255.0
  192.168.0.255 1

7
Supernetting iClicker Questions
8
What is the subnet mask for this
network?15.254.222.199/25

1. 255.255.255.0
2. 255.255.255.128
3. 255.255.254.0
4. 255.255.252.0
5. Something else

9
What is the broadcast address for this
network?120.144.100.95/23

1. 120.144.100.255
2. 120.144.101.255
3. 120.144.103.255
4. 120.144.255.255
5. Something else

10
What is the last usable address for this
network?10.14.3.128/23

1. 10.14.3.126
2. 10.14.3.254
3. 10.14.4.254
4. 10.14.2.254
5. Something else

11
What is the broadcast address for this
network?172.16.0.0/21

1. 172.16.0.255
2. 172.16.3.255
3. 172.16.7.255
4. 172.16.15.255
5. Something else

12
What is the subnet mask for this
network?172.31.128.0/20

1. 255.255.0.0
2. 255.255.240.0
3. 255.255.248
4. 255.255.252.0
5. Something else

13
How many class C subnets are included in this
network?1.2.3.4/18

1. 2
2. 8
3. 32
4. 64
5. Something else

14
What is the broadcast address for this
network?147.144.128.0/20

1. 147.144.255.255
2. 147.144.143.255
3. 147.144.135.255
4. 147.144.131.255
5. Something else

15
What is the best supernet to combine these
networks?192.168.1.0/24192.168.2.0/24192.168.3.
0/24

1. 192.168.0.0/23
2. 192.168.0.0/22
3. 192.168.1.0/22
4. 192.168.1.0/21
5. Something else

16
What is the best supernet to combine these
networks?192.168.12.0/24192.168.13.0/24192.168.
14.0/24

1. 192.168.12.0/23
2. 192.168.12.0/22
3. 192.168.8.0/21
4. 192.168.0.0/20
5. Something else

17
What is the best supernet to combine these
networks?192.168.1.0/24192.168.7.0/24192.168.8.
0/24

1. 192.168.0.0/22
2. 192.168.0.0/21
3. 192.168.0.0/20
4. 192.168.0.0/19
5. Something else

18
CCSF has the 147.144.0.0/16 address space. Which
subnet is best for the 3000 students using Wi-Fi?

1. 147.144.160.0/22
2. 147.144.160.0/21
3. 147.144.160.0/20
4. 147.144.160.0/19
5. Something else

19
Which subnet is best for a department with 500
computers?

1. 10.114.64.0/24
2. 10.114.64.0/23
3. 10.114.64.0/22
4. 10.114.64.0/21
5. Something else

20
Which subnet is best for a department with 511
computers?

1. 200.114.64.0/24
2. 200.114.64.0/23
3. 200.114.64.0/22
4. 200.114.64.0/21
5. Something else