A Security Engineer at a medium-sized accounting firm has been tasked with discovering how much information can be obtained from the firms public facing web servers. The engineer decides to start by using netcat to port 80.

The engineer

receives this output:

HTTP/1.1 200 OK

Server: Microsoft-IIS/6

Expires: Tue, 17 Jan 2011 01:41:33 GMT

Date: Mon, 16 Jan 2011 01:41:33 GMT

Content-Type: text/html

Accept-Ranges: bytes

Last-Modified: Wed, 28 Dec 2010 15:32:21 GMT

ETag: -b0aac0542e25c31:89d-

Content-Length: 7369

Which of the following is an example of what the engineer performed?

A. Cross-site scripting

B. Banner grabbing

C. SQL injection

D. Whois database query