Which section identifies the global tenant of an IPv6 unique local address?

Which section identifies the global tenant of an IPv6 unique local address?

• A. Global ID
• B. Subnet Identifier
• C. Interface Identifier
• D. Link Identifier

Answer: (A)

In an IPv6 unique local address, the section that identifies the global tenant is known as the Global ID. This portion consists of 40 bits and is designed to provide a unique identifier for the local network, ensuring that it is distinct across different networks. The Global ID is typically used to differentiate between various organizations or entities that are using unique local addresses, accommodating instances where multiple networks could potentially overlap. This structure allows for easier routing and management within and between unique local networks, establishing a framework for addressing that does not depend on the global public IPv6 address space. The unique local address format starts with the prefix FC00::/7, indicating that these addresses are for local use only and not routable on the global Internet. The other sections, such as the Subnet Identifier and Interface Identifier, serve different functions within the address structure. The Subnet Identifier helps in identifying subnets within a local network, while the Interface Identifier is used to identify a specific interface on a device, completing the address structure of 128 bits. However, neither plays a role in identifying the global tenant, which is specifically the role of the Global ID.

In an IPv6 unique local address, the section that identifies the global tenant is known as the Global ID. This portion consists of 40 bits and is designed to provide a unique identifier for the local network, ensuring that it is distinct across different networks. The Global ID is typically used to differentiate between various organizations or entities that are using unique local addresses, accommodating instances where multiple networks could potentially overlap.

This structure allows for easier routing and management within and between unique local networks, establishing a framework for addressing that does not depend on the global public IPv6 address space. The unique local address format starts with the prefix FC00::/7, indicating that these addresses are for local use only and not routable on the global Internet.

The other sections, such as the Subnet Identifier and Interface Identifier, serve different functions within the address structure. The Subnet Identifier helps in identifying subnets within a local network, while the Interface Identifier is used to identify a specific interface on a device, completing the address structure of 128 bits. However, neither plays a role in identifying the global tenant, which is specifically the role of the Global ID.