Which technology uses a hierarchical addressing scheme?

The technology that utilizes a hierarchical addressing scheme is IP (Internet Protocol). In IP addressing, each address consists of two main components: the network portion and the host portion. This structure allows for efficient routing of data on the internet and within private networks by segmenting IP addresses into distinct categories, such as Class A, Class B, and Class C, which further define the size of the networks and how they can be organized.

The hierarchical nature of IP addressing facilitates scalability and simplifies the routing process. Routers can make forwarding decisions based on the network prefix, which allows for route aggregation and reduces the amount of routing information that needs to be maintained in the network. Additionally, this hierarchy supports multi-layered addressing, accommodating both static and dynamic addressing schemes, such as CIDR (Classless Inter-Domain Routing).

In contrast, technologies like HDLC (High-Level Data Link Control), ISDN (Integrated Services Digital Network), and Frame Relay do not incorporate a hierarchical addressing scheme. HDLC is focused on link-layer framing, ISDN primarily provides a method to establish connections for voice and data services, and Frame Relay is a WAN protocol that operates on a flat addressing scheme rather than a hierarchical one. Thus, IP stands out as the correct answer for its