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What is SMTP?

Simple Mail Transfer Protocol (SMTP) is the standard protocol for sending emails across the Internet. SMTP uses TCP port 25 or 2525 and
sometimes you can have problems to send your messages

(c) What are cookies in the context of computer networks?
COOKIES- They are messages that a web server transmits to a web browser so that the web server can
keep track of the user’s activity on a specific web site.

(d) Rajeshwari is trying for on-line subscription to a magazine. For this she has filled in a form on the magazine’s
web site. When she clicks submit button she gets a message that she has left e-mail field empty and she must fill
it. For such checking which type of script is generally executed – client-side script or server-side script?

Ans: Client side scripting (e.g. VBscript, Javascript)

(e) Mention any one difference between freeware and free software.
Ans: Although both freeware and Free Software typically do not have any cost associated with acquiring the product. Free
software source code available whereas in freeware source code is not available.

Additional notes
Freeware

develop software skills while using this freeware software, but not to loose their business potential software

Shareware: can download and use a limited
version of software or full version of software for a limited period of time. We can say that Shareware software is just

Free Software: Free software can be used, modified and studied without any restriction. Free software can be copied

human readable form of the program called as source code with above permissions. Free Software Foundation
maintains the definition of free software.
Open Source: Open source software can be defined as computer software for which the source code of the software
is available under a copyright that must meet the open source definition.
There can be different open source copyright laws enforced by different software vendors.