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Zorluk: OrtaIPv4 Addressing and Subnetting

A system administrator is configuring static IP addresses for IoT monitoring sensors within a subnet assigned the network address block 192.168.88.0/26192.168.88.0/26. Which of the following IP addresses is a valid usable host address for a sensor in this subnet?

  1. 192.168.88.45192.168.88.45Cevap
  2. B
    192.168.88.0192.168.88.0
  3. C
    192.168.88.63192.168.88.63
  4. D
    192.168.88.64192.168.88.64

Cevap

The IP address 192.168.88.45192.168.88.45 is a valid usable host address within the 192.168.88.0/26192.168.88.0/26 subnet.
For a /26/26 prefix, the total number of addresses in the subnet is 232−26=642^{32-26} = 64. The address block spans from 192.168.88.0192.168.88.0 to 192.168.88.63192.168.88.63. Subtracting the network address (192.168.88.0192.168.88.0) and the broadcast address (192.168.88.63192.168.88.63) yields a usable host range of 192.168.88.1192.168.88.1 through 192.168.88.62192.168.88.62. The value 192.168.88.45192.168.88.45 falls within this valid range.

Adım Adım Çözüm

1
Determine the block size from the CIDR prefix length
A /26/26 prefix uses 32−26=632 - 26 = 6 host bits. The total block size is 26=642^6 = 64 addresses.
Calculating the total number of addresses per block establishes the subnet boundary.
2
Calculate the network ID and broadcast address
The network address is 192.168.88.0192.168.88.0. The broadcast address is 192.168.88.0+64−1=192.168.88.63192.168.88.0 + 64 - 1 = 192.168.88.63.
The first address in the block is the network ID and the last address is the broadcast address.
3
Identify the range of usable host IP addresses
Usable host range is from 192.168.88.1192.168.88.1 (first usable) to 192.168.88.62192.168.88.62 (last usable).
Usable host IPs exclude the network ID and the broadcast address.
4
Evaluate the given choices against the usable host range
The address 192.168.88.45192.168.88.45 is the only candidate that falls strictly between 192.168.88.1192.168.88.1 and 192.168.88.62192.168.88.62.
Only addresses within the usable host range can be assigned to host devices.

Anahtar Kavram

IPv4 Usable Host Addressing in CIDR Subnets
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Konular

IPv4 Addressing and Subnetting

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