This chapter discusses IPv6 addressing and subnetting. It covers how IPv4 addresses are organized into classes and reserved as public or private, while IPv6 does not use classes but IANA still reserves ranges for specific purposes. The chapter has two major sections on global unicast addresses as public IPv6, and unique local addresses as private IPv6. It aims to identify appropriate IPv6 schemes and describe addresses and troubleshooting for exam topics on IP addressing and configurations.

2. Chapter 26
IPv6 Addressing and Subnetting
IPv4 organizes the address space in a couple of ways. First, IPv4 splits addresses by class, with
Classes A, B, and C defining unicast IPv4 addresses. (The term unicast refers to the fact that
each address is used by only one interface.) Then, within the Class A, B, and C address range,
the Internet Assigned Numbers Authority (IANA) and the Internet Corporation for Assigned
Names and Numbers (ICANN) reserve most of the addresses as public IPv4 addresses, with a
few reserved as private IPv4 addresses.
IPv6 does not use any concept like the classful network concept used by IPv4. However, IANA
does still reserve some IPv6 address ranges for specific purposes, even with some address ranges
that serve as both public IPv6 addresses and private IPv6 addresses. IANA also attempts to take
a practical approach to reserving ranges of the entire IPv6 address space for different purposes,
using the wisdom gained from several decades of fast growth in the IPv4 Internet.
This chapter has two major sections. The first examines global unicast addresses, which serve as
public IPv6 addresses. The second major section looks at unique local addresses, which serve as
private IPv6 addresses.
This chapter covers the following exam topics:
IP addressing (IPv4 / IPv6)
Identify the appropriate IPv6 addressing scheme to satisfy addressing requirements in a
LAN/WAN environment.
Describe IPv6 addresses
Global unicast
Unique local
Troubleshooting
Troubleshoot and correct common problems associated with IP addressing and host
configurations.

3. Chapter 26
IPv6 Addressing and Subnetting
IPv4 organizes the address space in a couple of ways. First, IPv4 splits addresses by class, with
Classes A, B, and C defining unicast IPv4 addresses. (The term unicast refers to the fact that
each address is used by only one interface.) Then, within the Class A, B, and C address range,
the Internet Assigned Numbers Authority (IANA) and the Internet Corporation for Assigned
Names and Numbers (ICANN) reserve most of the addresses as public IPv4 addresses, with a
few reserved as private IPv4 addresses.
IPv6 does not use any concept like the classful network concept used by IPv4. However, IANA
does still reserve some IPv6 address ranges for specific purposes, even with some address ranges
that serve as both public IPv6 addresses and private IPv6 addresses. IANA also attempts to take
a practical approach to reserving ranges of the entire IPv6 address space for different purposes,
using the wisdom gained from several decades of fast growth in the IPv4 Internet.
This chapter has two major sections. The first examines global unicast addresses, which serve as
public IPv6 addresses. The second major section looks at unique local addresses, which serve as
private IPv6 addresses.
This chapter covers the following exam topics:
IP addressing (IPv4 / IPv6)
Identify the appropriate IPv6 addressing scheme to satisfy addressing requirements in a
LAN/WAN environment.
Describe IPv6 addresses
Global unicast
Unique local
Troubleshooting
Troubleshoot and correct common problems associated with IP addressing and host
configurations.

4. Chapter 26
IPv6 Addressing and Subnetting
IPv4 organizes the address space in a couple of ways. First, IPv4 splits addresses by class, with
Classes A, B, and C defining unicast IPv4 addresses. (The term unicast refers to the fact that
each address is used by only one interface.) Then, within the Class A, B, and C address range,
the Internet Assigned Numbers Authority (IANA) and the Internet Corporation for Assigned
Names and Numbers (ICANN) reserve most of the addresses as public IPv4 addresses, with a
few reserved as private IPv4 addresses.
IPv6 does not use any concept like the classful network concept used by IPv4. However, IANA
does still reserve some IPv6 address ranges for specific purposes, even with some address ranges
that serve as both public IPv6 addresses and private IPv6 addresses. IANA also attempts to take
a practical approach to reserving ranges of the entire IPv6 address space for different purposes,
using the wisdom gained from several decades of fast growth in the IPv4 Internet.
This chapter has two major sections. The first examines global unicast addresses, which serve as
public IPv6 addresses. The second major section looks at unique local addresses, which serve as
private IPv6 addresses.
This chapter covers the following exam topics:
IP addressing (IPv4 / IPv6)
Identify the appropriate IPv6 addressing scheme to satisfy addressing requirements in a
LAN/WAN environment.
Describe IPv6 addresses
Global unicast
Unique local
Troubleshooting
Troubleshoot and correct common problems associated with IP addressing and host
configurations.

5. Chapter 26
IPv6 Addressing and Subnetting
IPv4 organizes the address space in a couple of ways. First, IPv4 splits addresses by class, with
Classes A, B, and C defining unicast IPv4 addresses. (The term unicast refers to the fact that
each address is used by only one interface.) Then, within the Class A, B, and C address range,
the Internet Assigned Numbers Authority (IANA) and the Internet Corporation for Assigned
Names and Numbers (ICANN) reserve most of the addresses as public IPv4 addresses, with a
few reserved as private IPv4 addresses.
IPv6 does not use any concept like the classful network concept used by IPv4. However, IANA
does still reserve some IPv6 address ranges for specific purposes, even with some address ranges
that serve as both public IPv6 addresses and private IPv6 addresses. IANA also attempts to take
a practical approach to reserving ranges of the entire IPv6 address space for different purposes,
using the wisdom gained from several decades of fast growth in the IPv4 Internet.
This chapter has two major sections. The first examines global unicast addresses, which serve as
public IPv6 addresses. The second major section looks at unique local addresses, which serve as
private IPv6 addresses.
This chapter covers the following exam topics:
IP addressing (IPv4 / IPv6)
Identify the appropriate IPv6 addressing scheme to satisfy addressing requirements in a
LAN/WAN environment.
Describe IPv6 addresses
Global unicast
Unique local
Troubleshooting
Troubleshoot and correct common problems associated with IP addressing and host
configurations.

6. Chapter 26
IPv6 Addressing and Subnetting
IPv4 organizes the address space in a couple of ways. First, IPv4 splits addresses by class, with
Classes A, B, and C defining unicast IPv4 addresses. (The term unicast refers to the fact that
each address is used by only one interface.) Then, within the Class A, B, and C address range,
the Internet Assigned Numbers Authority (IANA) and the Internet Corporation for Assigned
Names and Numbers (ICANN) reserve most of the addresses as public IPv4 addresses, with a
few reserved as private IPv4 addresses.
IPv6 does not use any concept like the classful network concept used by IPv4. However, IANA
does still reserve some IPv6 address ranges for specific purposes, even with some address ranges
that serve as both public IPv6 addresses and private IPv6 addresses. IANA also attempts to take
a practical approach to reserving ranges of the entire IPv6 address space for different purposes,
using the wisdom gained from several decades of fast growth in the IPv4 Internet.
This chapter has two major sections. The first examines global unicast addresses, which serve as
public IPv6 addresses. The second major section looks at unique local addresses, which serve as
private IPv6 addresses.
This chapter covers the following exam topics:
IP addressing (IPv4 / IPv6)
Identify the appropriate IPv6 addressing scheme to satisfy addressing requirements in a
LAN/WAN environment.
Describe IPv6 addresses
Global unicast
Unique local
Troubleshooting
Troubleshoot and correct common problems associated with IP addressing and host
configurations.

7. Chapter 26
IPv6 Addressing and Subnetting
IPv4 organizes the address space in a couple of ways. First, IPv4 splits addresses by class, with
Classes A, B, and C defining unicast IPv4 addresses. (The term unicast refers to the fact that
each address is used by only one interface.) Then, within the Class A, B, and C address range,
the Internet Assigned Numbers Authority (IANA) and the Internet Corporation for Assigned
Names and Numbers (ICANN) reserve most of the addresses as public IPv4 addresses, with a
few reserved as private IPv4 addresses.
IPv6 does not use any concept like the classful network concept used by IPv4. However, IANA
does still reserve some IPv6 address ranges for specific purposes, even with some address ranges
that serve as both public IPv6 addresses and private IPv6 addresses. IANA also attempts to take
a practical approach to reserving ranges of the entire IPv6 address space for different purposes,
using the wisdom gained from several decades of fast growth in the IPv4 Internet.
This chapter has two major sections. The first examines global unicast addresses, which serve as
public IPv6 addresses. The second major section looks at unique local addresses, which serve as
private IPv6 addresses.
This chapter covers the following exam topics:
IP addressing (IPv4 / IPv6)
Identify the appropriate IPv6 addressing scheme to satisfy addressing requirements in a
LAN/WAN environment.
Describe IPv6 addresses
Global unicast
Unique local
Troubleshooting
Troubleshoot and correct common problems associated with IP addressing and host
configurations.

8. Chapter 26
IPv6 Addressing and Subnetting
IPv4 organizes the address space in a couple of ways. First, IPv4 splits addresses by class, with
Classes A, B, and C defining unicast IPv4 addresses. (The term unicast refers to the fact that
each address is used by only one interface.) Then, within the Class A, B, and C address range,
the Internet Assigned Numbers Authority (IANA) and the Internet Corporation for Assigned
Names and Numbers (ICANN) reserve most of the addresses as public IPv4 addresses, with a
few reserved as private IPv4 addresses.
IPv6 does not use any concept like the classful network concept used by IPv4. However, IANA
does still reserve some IPv6 address ranges for specific purposes, even with some address ranges
that serve as both public IPv6 addresses and private IPv6 addresses. IANA also attempts to take
a practical approach to reserving ranges of the entire IPv6 address space for different purposes,
using the wisdom gained from several decades of fast growth in the IPv4 Internet.
This chapter has two major sections. The first examines global unicast addresses, which serve as
public IPv6 addresses. The second major section looks at unique local addresses, which serve as
private IPv6 addresses.
This chapter covers the following exam topics:
IP addressing (IPv4 / IPv6)
Identify the appropriate IPv6 addressing scheme to satisfy addressing requirements in a
LAN/WAN environment.
Describe IPv6 addresses
Global unicast
Unique local
Troubleshooting
Troubleshoot and correct common problems associated with IP addressing and host
configurations.

9. Chapter 26
IPv6 Addressing and Subnetting
IPv4 organizes the address space in a couple of ways. First, IPv4 splits addresses by class, with
Classes A, B, and C defining unicast IPv4 addresses. (The term unicast refers to the fact that
each address is used by only one interface.) Then, within the Class A, B, and C address range,
the Internet Assigned Numbers Authority (IANA) and the Internet Corporation for Assigned
Names and Numbers (ICANN) reserve most of the addresses as public IPv4 addresses, with a
few reserved as private IPv4 addresses.
IPv6 does not use any concept like the classful network concept used by IPv4. However, IANA
does still reserve some IPv6 address ranges for specific purposes, even with some address ranges
that serve as both public IPv6 addresses and private IPv6 addresses. IANA also attempts to take
a practical approach to reserving ranges of the entire IPv6 address space for different purposes,
using the wisdom gained from several decades of fast growth in the IPv4 Internet.
This chapter has two major sections. The first examines global unicast addresses, which serve as
public IPv6 addresses. The second major section looks at unique local addresses, which serve as
private IPv6 addresses.
This chapter covers the following exam topics:
IP addressing (IPv4 / IPv6)
Identify the appropriate IPv6 addressing scheme to satisfy addressing requirements in a
LAN/WAN environment.
Describe IPv6 addresses
Global unicast
Unique local
Troubleshooting
Troubleshoot and correct common problems associated with IP addressing and host
configurations.

10. Chapter 26
IPv6 Addressing and Subnetting
IPv4 organizes the address space in a couple of ways. First, IPv4 splits addresses by class, with
Classes A, B, and C defining unicast IPv4 addresses. (The term unicast refers to the fact that
each address is used by only one interface.) Then, within the Class A, B, and C address range,
the Internet Assigned Numbers Authority (IANA) and the Internet Corporation for Assigned
Names and Numbers (ICANN) reserve most of the addresses as public IPv4 addresses, with a
few reserved as private IPv4 addresses.
IPv6 does not use any concept like the classful network concept used by IPv4. However, IANA
does still reserve some IPv6 address ranges for specific purposes, even with some address ranges
that serve as both public IPv6 addresses and private IPv6 addresses. IANA also attempts to take
a practical approach to reserving ranges of the entire IPv6 address space for different purposes,
using the wisdom gained from several decades of fast growth in the IPv4 Internet.
This chapter has two major sections. The first examines global unicast addresses, which serve as
public IPv6 addresses. The second major section looks at unique local addresses, which serve as
private IPv6 addresses.
This chapter covers the following exam topics:
IP addressing (IPv4 / IPv6)
Identify the appropriate IPv6 addressing scheme to satisfy addressing requirements in a
LAN/WAN environment.
Describe IPv6 addresses
Global unicast
Unique local
Troubleshooting
Troubleshoot and correct common problems associated with IP addressing and host
configurations.

11. Chapter 26
IPv6 Addressing and Subnetting
IPv4 organizes the address space in a couple of ways. First, IPv4 splits addresses by class, with
Classes A, B, and C defining unicast IPv4 addresses. (The term unicast refers to the fact that
each address is used by only one interface.) Then, within the Class A, B, and C address range,
the Internet Assigned Numbers Authority (IANA) and the Internet Corporation for Assigned
Names and Numbers (ICANN) reserve most of the addresses as public IPv4 addresses, with a
few reserved as private IPv4 addresses.
IPv6 does not use any concept like the classful network concept used by IPv4. However, IANA
does still reserve some IPv6 address ranges for specific purposes, even with some address ranges
that serve as both public IPv6 addresses and private IPv6 addresses. IANA also attempts to take
a practical approach to reserving ranges of the entire IPv6 address space for different purposes,
using the wisdom gained from several decades of fast growth in the IPv4 Internet.
This chapter has two major sections. The first examines global unicast addresses, which serve as
public IPv6 addresses. The second major section looks at unique local addresses, which serve as
private IPv6 addresses.
This chapter covers the following exam topics:
IP addressing (IPv4 / IPv6)
Identify the appropriate IPv6 addressing scheme to satisfy addressing requirements in a
LAN/WAN environment.
Describe IPv6 addresses
Global unicast
Unique local
Troubleshooting
Troubleshoot and correct common problems associated with IP addressing and host
configurations.

12. Chapter 26
IPv6 Addressing and Subnetting
IPv4 organizes the address space in a couple of ways. First, IPv4 splits addresses by class, with
Classes A, B, and C defining unicast IPv4 addresses. (The term unicast refers to the fact that
each address is used by only one interface.) Then, within the Class A, B, and C address range,
the Internet Assigned Numbers Authority (IANA) and the Internet Corporation for Assigned
Names and Numbers (ICANN) reserve most of the addresses as public IPv4 addresses, with a
few reserved as private IPv4 addresses.
IPv6 does not use any concept like the classful network concept used by IPv4. However, IANA
does still reserve some IPv6 address ranges for specific purposes, even with some address ranges
that serve as both public IPv6 addresses and private IPv6 addresses. IANA also attempts to take
a practical approach to reserving ranges of the entire IPv6 address space for different purposes,
using the wisdom gained from several decades of fast growth in the IPv4 Internet.
This chapter has two major sections. The first examines global unicast addresses, which serve as
public IPv6 addresses. The second major section looks at unique local addresses, which serve as
private IPv6 addresses.
This chapter covers the following exam topics:
IP addressing (IPv4 / IPv6)
Identify the appropriate IPv6 addressing scheme to satisfy addressing requirements in a
LAN/WAN environment.
Describe IPv6 addresses
Global unicast
Unique local
Troubleshooting
Troubleshoot and correct common problems associated with IP addressing and host
configurations.

13. Chapter 26
IPv6 Addressing and Subnetting
IPv4 organizes the address space in a couple of ways. First, IPv4 splits addresses by class, with
Classes A, B, and C defining unicast IPv4 addresses. (The term unicast refers to the fact that
each address is used by only one interface.) Then, within the Class A, B, and C address range,
the Internet Assigned Numbers Authority (IANA) and the Internet Corporation for Assigned
Names and Numbers (ICANN) reserve most of the addresses as public IPv4 addresses, with a
few reserved as private IPv4 addresses.
IPv6 does not use any concept like the classful network concept used by IPv4. However, IANA
does still reserve some IPv6 address ranges for specific purposes, even with some address ranges
that serve as both public IPv6 addresses and private IPv6 addresses. IANA also attempts to take
a practical approach to reserving ranges of the entire IPv6 address space for different purposes,
using the wisdom gained from several decades of fast growth in the IPv4 Internet.
This chapter has two major sections. The first examines global unicast addresses, which serve as
public IPv6 addresses. The second major section looks at unique local addresses, which serve as
private IPv6 addresses.
This chapter covers the following exam topics:
IP addressing (IPv4 / IPv6)
Identify the appropriate IPv6 addressing scheme to satisfy addressing requirements in a
LAN/WAN environment.
Describe IPv6 addresses
Global unicast
Unique local
Troubleshooting
Troubleshoot and correct common problems associated with IP addressing and host
configurations.

14. Chapter 26
IPv6 Addressing and Subnetting
IPv4 organizes the address space in a couple of ways. First, IPv4 splits addresses by class, with
Classes A, B, and C defining unicast IPv4 addresses. (The term unicast refers to the fact that
each address is used by only one interface.) Then, within the Class A, B, and C address range,
the Internet Assigned Numbers Authority (IANA) and the Internet Corporation for Assigned
Names and Numbers (ICANN) reserve most of the addresses as public IPv4 addresses, with a
few reserved as private IPv4 addresses.
IPv6 does not use any concept like the classful network concept used by IPv4. However, IANA
does still reserve some IPv6 address ranges for specific purposes, even with some address ranges
that serve as both public IPv6 addresses and private IPv6 addresses. IANA also attempts to take
a practical approach to reserving ranges of the entire IPv6 address space for different purposes,
using the wisdom gained from several decades of fast growth in the IPv4 Internet.
This chapter has two major sections. The first examines global unicast addresses, which serve as
public IPv6 addresses. The second major section looks at unique local addresses, which serve as
private IPv6 addresses.
This chapter covers the following exam topics:
IP addressing (IPv4 / IPv6)
Identify the appropriate IPv6 addressing scheme to satisfy addressing requirements in a
LAN/WAN environment.
Describe IPv6 addresses
Global unicast
Unique local
Troubleshooting
Troubleshoot and correct common problems associated with IP addressing and host
configurations.

15. Chapter 26
IPv6 Addressing and Subnetting
IPv4 organizes the address space in a couple of ways. First, IPv4 splits addresses by class, with
Classes A, B, and C defining unicast IPv4 addresses. (The term unicast refers to the fact that
each address is used by only one interface.) Then, within the Class A, B, and C address range,
the Internet Assigned Numbers Authority (IANA) and the Internet Corporation for Assigned
Names and Numbers (ICANN) reserve most of the addresses as public IPv4 addresses, with a
few reserved as private IPv4 addresses.
IPv6 does not use any concept like the classful network concept used by IPv4. However, IANA
does still reserve some IPv6 address ranges for specific purposes, even with some address ranges
that serve as both public IPv6 addresses and private IPv6 addresses. IANA also attempts to take
a practical approach to reserving ranges of the entire IPv6 address space for different purposes,
using the wisdom gained from several decades of fast growth in the IPv4 Internet.
This chapter has two major sections. The first examines global unicast addresses, which serve as
public IPv6 addresses. The second major section looks at unique local addresses, which serve as
private IPv6 addresses.
This chapter covers the following exam topics:
IP addressing (IPv4 / IPv6)
Identify the appropriate IPv6 addressing scheme to satisfy addressing requirements in a
LAN/WAN environment.
Describe IPv6 addresses
Global unicast
Unique local
Troubleshooting
Troubleshoot and correct common problems associated with IP addressing and host
configurations.

16. Chapter 26
IPv6 Addressing and Subnetting
IPv4 organizes the address space in a couple of ways. First, IPv4 splits addresses by class, with
Classes A, B, and C defining unicast IPv4 addresses. (The term unicast refers to the fact that
each address is used by only one interface.) Then, within the Class A, B, and C address range,
the Internet Assigned Numbers Authority (IANA) and the Internet Corporation for Assigned
Names and Numbers (ICANN) reserve most of the addresses as public IPv4 addresses, with a
few reserved as private IPv4 addresses.
IPv6 does not use any concept like the classful network concept used by IPv4. However, IANA
does still reserve some IPv6 address ranges for specific purposes, even with some address ranges
that serve as both public IPv6 addresses and private IPv6 addresses. IANA also attempts to take
a practical approach to reserving ranges of the entire IPv6 address space for different purposes,
using the wisdom gained from several decades of fast growth in the IPv4 Internet.
This chapter has two major sections. The first examines global unicast addresses, which serve as
public IPv6 addresses. The second major section looks at unique local addresses, which serve as
private IPv6 addresses.
This chapter covers the following exam topics:
IP addressing (IPv4 / IPv6)
Identify the appropriate IPv6 addressing scheme to satisfy addressing requirements in a
LAN/WAN environment.
Describe IPv6 addresses
Global unicast
Unique local
Troubleshooting
Troubleshoot and correct common problems associated with IP addressing and host
configurations.