IP address Understanding _IP address = Network address + host address, but the specific front how much is the network address to see the topic description

Topic:

The address that belongs to the network 112.10.200.0/21 is ()

• 112.10.206.0
• 112.10.217.0
• 112.10.224.0
• 112.10.198.0

Analytical Solutions:

Summarize:

1. First, understand what the back of that 21 means, 21 means that the first 21 bits of the IP represents the network address, the remaining 11 bits represents the host address. IP Address Total 32 bits = 4 bytes * 8 bits per byte;
2. Second, is to understand that a point is separated by a byte, then the front 21 bits to where.
3. Write 200 as binary =128+64+8=11001000, so the front 21 bits, intercept 200 of the first 5 bits, the remaining three bits plus a subsequent byte indicates the host address
4. Size is 200-207. So choose A.

IP address Understanding _IP address = Network address + host address, but the specific front how much is the network address to see the topic description