Free EC0-350 Web TestEngine Demo

Q80 Single choice

Scanning for services is an easy job for Bob as there are so many tools available from the Internet. In order for him to check the vulnerability of XYZ, he went through a few scanners that are currently available.
Here are the scanners that he uses:

1. Axent's NetRecon (http://www.axent.com)

2. SARA, by Advanced Research Organization (http://www-arc.com/sara)

3. VLAD the Scanner, by Razor (http://razor.bindview.com/tools/)

However, there are many other alternative ways to make sure that the services that have been scanned will be more accurate and detailed for Bob.

What would be the best method to accurately identify the services running on a victim host?

A
Using Cheops-ng to identify the devices of XYZ.
B
Using the manual method of telnet to each of the open ports of XYZ.
C
Using a vulnerability scanner to try to probe each port to verify or figure out which service is running for
XYZ.
D
Using the default port and OS to make a best guess of what services are running on each port for XYZ.

EC0-350 Web TestEngine demo