Your network contains an Active directory domain named fabrikam.com. The domain contatins a
Web server named Web1 that runs Windows Server 2008 R2. You install the SMTP Server feature on
Web1. You need to verify whether you can establish an SMTP connection to Web1. Which tool
should you use?
A.
Telnet
B.
Windows Firewall
C.
Internet Information Services (IIS) 6.0 Manager
D.
Internet Information Services (IIS) Manager
Explanation:
But how does SMTP work? The “Simple” part of the name is pure truth in advertising. A message can
be moved from one SMTP server to another using one of the simplest TCP/IP protocols (lineoriented telnet) and just a few simple text commands. One SMTP server makes a telnet-like
connection to TCP port 25 on the other; it then sends commands and data, receiving numeric
responses. This process can be simulated with any telnet client. In fact, in the early days of the grand
network unification of ARPAnet, Bitnet, Edunet, and several other major networks, a lot of testing
was done this way, with developers connecting to an SMTP server and typing commands at it, just to
see what would happen. To do this yourself, run telnet from a command prompt and connect to an
online SMTP mail server on TCP port 25. The server will send back a response that looks a lot like
this: C:\> telnet newmoon.microsoft.net 25 Trying 127.0.0.1… Connected to
newmoon.microsoft.net. Escape character is ‘^]’. 220 newmoon.microsoft.net Microsoft ESMTP
MAIL Service, Version: 6.0.3790.1830 ready at Sun, 15 May 2005 22:56:26 –0700
http://technet.microsoft.com/en-us/magazine/2005.11.howitworkssmtp.aspx