Networking Class | Elements of network | Topology | Cyber Security Classes | Hacking 2020

 

Networking Class | Elements of network | Topology | Cyber Security Classes | Hacking 2020




Types of Network 
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PAN (Personal Area Network): A network covering a very small area, usually a small room. The best known wireless PAN network technology is Bluetooth.


LAN (Local Area Network): It covers the Local area. This usually includes a local office and they're also pretty common in homes now, thanks to the spread of Wi-Fi. 
Like  offices.

MAN (Metropolitan Area Network) :A metropolitan area network (MAN) is similar to a local area network (LAN) but spans an entire city or campus. MANs are formed by connecting multiple LANs. Thus, MANs are larger than LANs but smaller than wide area networks (WAN). 
Delhi as a whole can be considered as MAN. 

WAN (Wide Area Network) : A network that covers an area wider than a LAN.Distances can range from a network connecting multiple buildings on a corporate or college campus to satellite links connecting offices in different countries.
Our Intenet the articles or browsing we do is a WAN based network.

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PORTS
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Ports are the doors from where data comes and goes out of any device connected to a network can be LAN MAN or WAN.

Types of Ports
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Physical Ports : They are tangible in nature. i.e we can see & touch the ports, and as its nature data comes and goes out from these ports.

For Example: USB Ports, LAN, HDMI, VGA etc etc.


Virtual Ports : There are total 65535 ports avialable as it clear from the virtual they non tangible ports which you can see and feel but cant touch.
For Example: Ports 80,8080 for HTTP : data comes and goes from client to server.
Some well known ports


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        Port         |       Name
         21          | File Transfer Protocol (FTP)
         22          | Secured shell (Ssh)
         23          | Telnet
         25          | SMTP
         80          | HyperText Transfer Protocol (http)       |

 * ssh+FTP= SFTP (22)


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