Networks

Overview of a Network Email Web Ftp Newsgroups

The Network Structure

   A network is a bunch of computers and other hardware connected together The Local Area Network The outside network

Topology

Common Uses of a Network

     Email Web access File transfer Newsgroups Remote access

The Internet

    A global network sharing resources World Wide Web (WWW) Email File transfer

World Wide Web (WWW)

   Web browser like Netscape used to navigate web sites Easy to navigate and find information due to the hyper linked nature Netscape, lynx and Internet Explorer

Email

   What is email?

Mail readers – pine Other mail readers – mutt, elm

Proxy Server

     What is a proxy server?

Need for proxy Setting up proxy in Netscape Setting up proxy for lynx Differences between local sites and outside ones

File Transfer Protocol (FTP)

   Transfer files to and from a computer Bare –bones ftp program Alternatives like ncftp

Example FTP Session

STEP BY STEP 1.

2.

3.

4.

5.

Starting FTP – – Logging in User ID and password Anonymously Transferring files A few features Logging Out

Newsgroups

   What is a newsgroup News reader tin Other news readers like pine, slrn

News Agent Tin

STEP BY STEP 1.

2.

3.

4.

Export the environment variable NNTPSERVER Starting tin Subscribing to newsgroups Posting a sample message

Remote Access

    What it means Telnet and ssh Putty client on Windows Remote execution

Useful Resources

    Online documentation to almost everything http://docs.cse.iitb.ac.in:8080 Computer Center’s User Guide http://www.cc.iitb.ac.in/userman/user_man.html

A large collection of online books, documents and tutorials http://tilak.ee.iitb.ac.in

A nice FAQ http://www.cse.iitb.ac.in/cslabs/swlab/faq.html

Useful Resources (Cont …)

   A large collection of online books, documents and tutorials http://tilak.ee.iitb.ac.in

Tilak FTP Search http://tilak.ee.iitb.ac.in/ftpsearch Anonymous FTP sites – – – ftp://ftp.cse.iitb.ac.in

ftp://ftp.cc.iitb.ac.in

ftp://ftp.it.iitb.ac.in

Summary

      What of a Network Network Topology The Internet Proxy Server World Wide Web Step by Step procedures      Email FTP Newsgroups Remote access covering Telnet and ssh A few useful local sites