Network+ Tutorial Oct 27 08

N003 [Q324]

Which Protocol is used to access Internet ?

==>TCP/IP can be used to access Internet

==>IPX/SPX is not to used for accessing Internet . IPX/SPX is only used in Novell System (Netware OS)

==>NetBEUI , is non routable , it CANNOT access Internet


Which system is using IPX/SPX protocol ?

Only Novell ( its operating system is Netware ) is using IPX/SPX

However , Latest version of Novell system is starting to use TCP/IP

Window based , Unix/Linux and Apple based operating system are using TCP/IP


[Q325]

What is Server ?

Server can provide a lot of services . The type of service will be named after this Server .

Example :
If the Server is use to transfer file , it is call FTP Server or
If it is use to manage website / webpage , this Server is called Web Server .

Please keep in mind , for most cases , Web Server also can perform file transfer like upload/download file , in this case this type of Web Server also can be named as FTP Server or
File Server

If the Server is used for Sharing Printing , it is Print Server .

Server is a Network Resource .

Server is a Centralized Network Device , because any users can access to it and use it for whatever purpose .

One Server can be have multifunction like it can send mail , transfer file , print file , provide web service
, therefore this Server can named as Mail Server / FTP Server / Web Server .

What is Network Resource ?

The device than can be used by any users on the networking . Any user on the networking can use this device for certain purpose. Example , Server is network resource because it can serve any users for various purposes .


What is Web Server and SMTP Server ?

Web Server , is used to handle all the Web Activities , It always involve FTP to upload / download the files. We need Web Software ( web Browser ) + HTTP in order access Web Server

SMTP Server , is a mail server . This Server always involve SMTP protocol

Router and Port Filtering

If you put these 2 Servers ( Web & Mail Servers ) in your LAN , you can configure your Router to filter FTP and SMTP port , including blocking this port . But once you block Port 21 ( FTP port ) and Port 25 (SMTP Port ) , this will affect files cannot be transfer ( download/upload) and the mail cannot be sent .

Always keep in mind , we can use ROUTER ( if it is act as Gateway ) to configure the Well Known Port.

But , but , not all the Router has the feature to block the Port Number