A network technician is configuring a new subnet to accommodate a cluster of 40 usable hos… — CompTIA Network+

A network technician is configuring a new subnet to accommodate a cluster of $40$ usable host interfaces. What is the minimum IPv4 prefix length (in CIDR notation, e.g., $24$ for $/24$ ) required to support this number of hosts?

Cevap: 26

Cevap

The minimum IPv4 prefix length required is 26.

To support

40

usable hosts, a subnet requires

6

host bits because

2^6 - 2 = 62

usable IP addresses (

2^5 - 2 = 30

is too small). Subtracting

6

host bits from

32

total IPv4 bits results in a prefix length of

26

(or

/26

Adım Adım Çözüm

Determine host capacity requirement

Need a subnet that provides at least

40

usable host IP addresses.

Each subnet reserves two IP addresses: one for the network ID and one for the broadcast address.

Find host bits needed

6

host bits are required (

2^6 - 2 = 62

usable hosts).

5

host bits only yield

30

usable addresses, which fails the requirement of

40

hosts.

Compute CIDR prefix length

32 - 6 = 26

An IPv4 address consists of

32

total bits; subtracting the host bits gives the network prefix bits.

Anahtar Kavram

Host capacity formula and CIDR prefix length calculation

Soru

Cevap

Adım Adım Çözüm

Anahtar Kavram

Sık Yapılan Hatalar

Konular

Bu konudan daha fazla soru