Question: Class Network Address Mask bits Subnets Hosts 10.0.0.0 20 172.16.0.0 6 190.20.1.0 512 192.168.0.0 30 205.210.0.0 64 Table 1. Classful subnetting Address Mask Next Hop
| Class | Network Address | Mask bits | Subnets | Hosts |
| 10.0.0.0 | 20 | |||
| 172.16.0.0 | 6 | |||
| 190.20.1.0 | 512 | |||
| 192.168.0.0 | 30 | |||
| 205.210.0.0 | 64 |
Table 1. Classful subnetting
| Address | Mask | Next Hop |
| 135.46.56.0 | 22 | eth0 |
| 135.46.60.0 | 22 | eth1 |
| 192.53.40.0 | 23 | router 1 |
| 0.0.0.0 | 0 | router 2 |
Table 2. Forwarding table
| Destination Address | Calculation | Action |
| 135.46.63.10 | 135.46.63.10 && 255.255.252.0=135.46.60.0 | eth1 |
| 135.46.57.14 | ||
| 135.46.52.2 | ||
| 192.53.40.7 | ||
| 192.53.56.7 |
Table 3. Incoming packets
| Department | Requested size | Allocated hosts | Subnet Address | Mask |
| Accounting | 25 | |||
| Marketing | 35 | |||
| Human Resources | 30 | |||
| Shipping | 10 | |||
| IT | 15 |
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