HTTP Response $1$

HTTP$/1.12000$K

Date: Tue, $25$ Sep $201821$:$21$:$20$ GMT

Server: Apache$/2\mathrm{.}2\mathrm{.}21($Unix mod$\_$ssl$/2\mathrm{.}2\mathrm{.}21$ OpenSSL$/1\mathrm{.}0\mathrm{.}0$k DAV$/2$ PHP$/5\mathrm{.}4\mathrm{.}3)$

WwW$-$Authenticate: Cookie realm$=$"fakesite"

Allow: OPTIONS, GET, POST, HEAD, PUT

Question: What kind of request was used here that would cause an HTTP server to tell the client all of the HTTP request methods it will respond to$?$

Analysis: Do you think this HTTP request method can be used by an attacker to gather information about an HTTP server? Why or why not?