Classic UNIX super-server: Which of the following services is typically NOT managed by inetd/xinetd by default?

Introduction / Context:
Historically, inetd (and its successor xinetd) acted as a super-server that listened on behalf of many lightweight network services, launching per-connection daemons on demand. Some services, however, are designed to run as standalone daemons.

Given Data / Assumptions:

• We consider default/typical configurations on UNIX/Linux.
• Legacy small services (e.g., finger, time, talk/ntalk) were often inetd-managed.
• SSH (Secure Shell) is generally a persistent daemon (sshd).

Concept / Approach:
inetd/xinetd spawns services on demand for simple, short-lived protocols. SSH typically runs as a standalone daemon (sshd) to handle encrypted sessions efficiently and to support features like key exchange and persistent connections. Although inetd wrappers are possible, they are not the usual or recommended default.

Step-by-Step Solution:

Verification / Alternative check:
Check service definitions: systemctl status sshd vs. legacy inetd/xinetd configuration files; classic examples list finger, talk/ntalk, time/echo under inetd.

Why Other Options Are Wrong:
time, ntalk, finger: Canonical inetd-managed small services. None of the above: Incorrect because SSH is typically not inetd-managed by default.

Common Pitfalls:
Assuming that any network service can or should be inetd-managed; while possible, performance and feature needs often dictate standalone daemons like sshd.

Final Answer:
SSH