Page 201 - DCAP207_NETWORKS_DCAP406_COMPUTER_NETWORKS

Computer Networks/Networks

Notes Java is Object-Oriented programming and therefore, it is simpler and easier to read
programs. It provides more efficient reuse of code.

Java is platform independent language in which a Java program never really executes
natively on the host machine. Instead, a special native program called the Java interpreter
reads the byte code and executes the corresponding native machine instructions.

Java is considered safe and secure execution of code across a network, even when the
source of that code was untrusted and possibly malicious.

Java is high performance language in which Java byte codes are compiled on the fly to
code while C++ uses just-in-time compiler. The native-machine-architecture compilers
for Java are used to produce executable code that does not require a separate interpreter.

Java is multi threaded and a single Java program can have many different threads executing
independently and continuously.

Java is garbage collected in which memory is allocated as needed and reclaimed by the
garbage collector when it is no longer needed.

Self Assessment

State whether the following statements are true or false:
7. A browser is software, which your computer uses to view WWW documents and access
the Internet.
8. The hyperlink allows electronic files on the Web to be linked so you can jump easily
between them using FTP protocol.

9. The hypermedia documents not only provide links to other pieces of text, but it also
provides link to other forms of media like sounds, images and movies.
10. The www employs a connection oriented protocol.

11. The protocol used by the web clients and web servers to communicate with each other is
called the HTTP.
12. Documents in the World Wide Web are classified into five types.

13. The static webpages displays the same information for all web users from all contexts and
provides hypertext links to perform navigation.
14. The dynamic web pages use three types of interactivity.

15. Server side scripting dynamic webpages are designed with the help of server-side languages
like PHP, Perl, ASP, JSP, etc.

12.4 Multimedia

As the name suggests, multimedia is a set of more than one media element used to produce a
concrete and more structured way of communication. In other words multimedia is simultaneous
use of data from different sources. These sources in multimedia are known as media elements.
With growing and very fast changing information technology, Multimedia has become a crucial
part of computer world. Its importance has realised in almost all walks of life, may it be education,
cinema, advertising, fashion and what not.
Throughout the 1960s, 1970s and 1980s, computers have been restricted to dealing with two
main types of data - words and numbers. But the cutting edge of information technology

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