What Unicast address scope consists of privately routable addresses that do not route outside the site?

The unicast address scope that consists of privately routable addresses, which do not route outside the site, is known as site-local addresses. These addresses are specifically reserved for communication within a single site or organization. Site-local addresses allow for the creation of private networks that can be used internally, while keeping the traffic from being routed on the broader internet.

In IPv6, site-local addresses begin with the prefix "FEC0::/10," which designates them as addresses that should not be routable beyond the local site. This characteristic is essential for maintaining internal network privacy and is particularly beneficial for enterprises that wish to keep certain communications contained within their local environment.

In contrast, link-local addresses are meant for communication within a single network segment and have a limited scope, only effective on the local network where the devices are connected. Aggregatable local addresses allow for some level of routing under specific conditions but are primarily designed to link different networks together rather than confine traffic within a site. Aggregatable global addresses, on the other hand, are routable across the internet and are used for communication between different sites or with external entities.

Thus, the identification of site-local addresses as the correct choice emphasizes their purpose of facilitating private, internal communication without exposure