Examkin

Question

Difficulty: MediumIPv6 Addressing and Prefixes

A network administrator is allocated the IPv6 prefix block 2001:db8:acad:4000::/522001:\text{db8}:\text{acad}:4000::/52 for a corporate branch network. The administrator needs to divide this block into standard /64/64 subnets for local LAN segments. How many /64/64 subnets can be created from this /52/52 prefix block?

  1. 4,096Answer
  2. B
    4,094
  3. C
    256
  4. D
    1,024

Answer

4,096 subnets can be created from a /52 prefix block when using a /64 prefix length.
To calculate the number of /64/64 subnets created from a /52/52 prefix, subtract the assigned prefix length from the target subnet length (64−52=1264 - 52 = 12 bits). Raising 2 to the power of the subnet bit count (2122^{12}) gives 4,096 unique /64/64 subnets.

Step-by-Step Solution

1
Determine the number of bits available for subnetting
Subnet bits = 64−52=1264 - 52 = 12 bits
The difference between the target prefix length (/64) and the assigned prefix length (/52) defines the subnet ID space.
2
Calculate total subnets using powers of 2
212=4,0962^{12} = 4,096
Each additional binary bit doubles the number of available subnets.

Key Concept

IPv6 Prefix Subnetting
Rate this question

Topics

IPv6 Addressing and Prefixes

More questions from this topic