IPv6 Addresses Explained | Cisco CCNA 200-301
CertBros・10 minutes read
IP version 6 was developed to address the shortage of IP version 4 addresses caused by the increasing number of devices, offering a wide range of addresses and efficiency improvements, including the use of hexadecimal characters and compression techniques. Different types of IP version 6 addresses serve specific functions, such as global unicast, unique local, link local, multicast, and anycast addresses, each identified by distinct prefixes like 2 or 3 for global unicast and FF for multicast.
Insights
- The transition from IPv4 to IPv6 was necessitated by the exponential increase in devices, as IPv6 offers a significantly larger pool of addresses and various efficiency enhancements.
- IPv6 addresses are 128-bit long, divided into eight hextets, using hexadecimal characters and binary bits for representation, with distinct types like global unicast, unique local, link local, multicast, and anycast addresses serving specific functions.
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Recent questions
What prompted the transition from IP version 4 to IP version 6?
The rise in devices led to a shortage of addresses in IP version 4, prompting the transition to IP version 6.
How is an IP version 6 address structured?
An IP version 6 address is 128 bits long, divided into eight hextets, unlike IP version 4's 32-bit, four-octet structure.
How are IP version 6 addresses compressed?
IP version 6 addresses are compressed by removing continuous zeros and leading zeros in hextets.
What are the different types of IP version 6 addresses?
IP version 6 addresses include global unicast, unique local, link local, multicast, and anycast addresses, each serving distinct purposes.
How do IP version 6 addresses represent values?
IP version 6 addresses use hexadecimal characters (0-9, A-F) and binary bits to represent values.
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Summary
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"IP Version 6: Addressing Efficiency and Diversity"
- IP version 4 initially created 4,294,967,296 addresses, but the rise in devices led to a shortage, prompting the transition to IP version 6.
- IP version 6 offers a vast number of addresses and various efficiency improvements.
- An IP version 6 address is 128 bits long, divided into eight hextets, unlike IP version 4's 32-bit, four-octet structure.
- IP version 6 addresses use hexadecimal characters (0-9, A-F) and binary bits to represent values.
- IP version 6 addresses are compressed by removing continuous zeros and leading zeros in hextets.
- IP version 6 addresses include global unicast, unique local, link local, multicast, and anycast addresses, each serving distinct purposes.
- Global unicast addresses start with 2 or 3, unique local with F followed by C or D, link local with FE, and multicast with FF.
- Anycast addresses allow multiple devices to share the same IP, with data sent to the nearest device with that address.
