12.8.5 Check Your Understanding – Subnet an IPv6 Network Answers

1. True or False? IPv6 was designed with subnetting in mind.

  • True
  • False

Explanation: The correct answer is True. IPv6 has a separate subnet ID field in the network prefix portion of the address that can be used to create subnets.

2. Which field in an IPv6 GUA is used for subnetting?

  • Prefix
  • Network
  • Global Routing Prefix
  • Subnet ID
  • Interface ID

Explanation: The Subnet ID field, which is between the Global Routing Prefix field and the Interface ID field, is used for subnetting.

3. Given a /48 Global Routing Prefix and a /64 prefix, what is the subnet portion of the following address: 2001:db8:cafe:1111:2222:3333:4444:5555

  • café
  • 1111
  • 2222
  • 3333
  • 4444

Explanation: The subnet portion of the address is the 16 bits between the /48 and /64 prefixes, which are 2222.

4. Given a /32 Global Routing Prefix and a /64 prefix, how many bits would be allocated for the Subnet ID?

  • 8
  • 16
  • 32
  • 48
  • 64

Explanation: The subnet portion of the address consists of the 32 bits between the /32 and /64 prefixes.

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