Which of the following services is NOT usually protected via TCP wrappers?

A.
ftp

B.
finger

C.
auth

D.
http

Explanation/Reference:
From the man pages:
tcpd – access control facility for internet services
The  tcpd  program  can  be  set up to monitor incoming requests for telnet, finger, ftp, exec, rsh, rlogin, tftp, talk, comsat and other services that have a one-to-one mapping onto executable files.
auth is an older protocol similiar to finger.