Page 132 - DMGT505_MANAGEMENT_INFORMATION_SYSTEM

Unit 6: Business Networks and Telecommunications

An e-mail address has the form user@subdomain.subdomain.domain, e.g. Notes
rakesh@iimcal.ac.in
How does one send an e-mail?

(a) Connect up to a service provider, by dial up, leased line, or having access to some
network.
(b) Many different mail programs are available, from the most basic one in UNIX,
called “mail” up to some sophisticated ones like “elm”, “pine”.
(c) These same programs allow you to read your mail, and reply by simply pressing a
key. You can also have some aliases, so you do not need to remember the exact
address of people to whom you mail quite often.
E-mail also provides services to people without full Internet connectivity.

Example: Many FTP sites (see below) have an electronic address to which you can send
a message, asking for certain file, and that file will be mailed to your. Other services that can be
done via e-mail are archie lookup, IP address resolver, WHOIS service.

2. Telnet (Logging in to Remote Network Computers): Telnet is the Internet facility that
allows you to execute commands on a remote host (another computer, most likely one to
which you do not have physical access) as if you were logged in locally. You need to know
the name of the machine to which you want to connect, and to have a valid user name in
it. There is no such thing as “anonymous” telnet.
The commands for telnet are:
(a) telnet hostname: it will open a connection to the host you name.
For example, “telnet math.sunysb.edu” will connect you to the machine named
math.sunysb.edu
(b) telnet “address”: it opens a connection to the host at “address”.
3. Archie: Suppose you know about some program that you want to install in your machine,
and you know the program is available some where out there in the Internet. How do you
find a machine with such program, so you can get it via FTP? Instead of searching randomly
at various FTP sites, let ARCHIE do it for you. This facility maintains a database with the
names of hundreds of Internet sites accessible via anonymous ftp. There are several ARCHIE
servers, some of them are:
Name IP address
archie.rutgers.edu 128.6.18.15
archie.cs.mcgill.ca 132.206.51.250

archie.funnet.fi 128.214.6.102
archie.rediris.es 130.206.1.2
archie.sura.net 192.239.16.13

archie.doc.ic.ac.uk 146.169.16.11
The way to access an ARCHIE server is via telnet, e.g. “telnet archie.rutgers.edu”. Log in
as “archie”. No password is required. There are several ways you can look for files.
4. Usenet and Mailing List: If you want to receive periodically information about certain
topics, there are two things you can do. The first possibility is to read the news groups of

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