Which two aspects does each proxy service specify?

Each proxy service is characterized by its type and attributes. The proxy type indicates the specific functionality and role that the proxy server serves within the network infrastructure, such as forward proxies, reverse proxies, or transparent proxies. Understanding the type of proxy helps in tailoring security measures and performance optimizations according to the intended use.

The attributes of the proxy service encompass various configurable settings and capabilities, which can include logging preferences, caching mechanisms, filtering rules, and authentication methods. These attributes determine how the proxy interacts with client requests and responses, as well as its behavior in terms of policy enforcement and content control.

The other options, while they refer to important elements in network configurations, do not comprehensively define what is specified by each proxy service. Port numbers and security levels focus specifically on communication aspects rather than the proxy's inherent properties. Performance metrics and bandwidth relate to efficiency rather than the proxy’s configuration. Lastly, endpoint address and status describe aspects of network connectivity and current functioning state rather than defining the service itself. Hence, the focus on proxy type and attributes accurately captures the defining features of each proxy service.