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Zorluk: KolayIPv4 Addressing and Subnetting

A network technician is configuring a local interface using the IPv4 subnet block 192.168.50.0/28192.168.50.0/28. What is the maximum number of usable host IP addresses available on this subnet?

  1. 14Cevap
  2. B
    16
  3. C
    30
  4. D
    12

Cevap

The maximum number of usable host IP addresses on a /28 subnet is 14.
In IPv4 networking, a /28 prefix reserves 4 bits for host addressing (32−28=432 - 28 = 4). The total number of IP addresses within the block is 24=162^4 = 16. Subtracting the dedicated network address and broadcast address (16−216 - 2) yields 14 usable IP addresses for host devices.

Adım Adım Çözüm

1
Determine the number of host bits in a /28 subnet.
32 total IPv4 bits - 28 network bits = 4 host bits.
The prefix length /28 specifies that 28 bits are reserved for the network prefix.
2
Calculate total available IP addresses.
24=162^4 = 16 total addresses.
The total capacity of a binary address block is 2n2^n, where nn is the number of host bits.
3
Subtract reserved addresses to find usable host count.
16−2=1416 - 2 = 14 usable host IP addresses.
The first address serves as the network identifier and the final address serves as the subnet broadcast address; neither can be assigned to individual hosts.

Anahtar Kavram

IPv4 Subnet Usable Host Calculation
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Konular

IPv4 Addressing and Subnetting

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