Understanding Network Devices

we need to understand the meant by network devices,network device is a hardware or software which allow us to send the data packet between the device , computer , server without any interuption.we are going to understand different network devices like Modem, Router, switch,Hub,firewall ,load balancer in detail

Modem(modulator and demodulator):

-The main function of modem is to covert digital data to analog signal and vice-versa

-the modem is found just before the isp(internet service provider) .

-suppose you searched https://anjanpajiyar.com ,the first request goes router which just routes the path , after that it sends to the modem which convert the digital data like 0s,1s into the analog signal after that analog signal travel in internet through cable or telephone line or optical fibers, after that it goes to modem nearest to the the website domain , which again convert into digial data as computer only understand the digital data .

Router:

-The function of the router is to connect different computer network and manage the traffic .

-the router is the only network device which helps connection in LAN and WAN,

-the difference between the router and the modem is that the router connect the device,manage traffic while the modem help in converting the signal

Hub:

switch is the network device which work on multicasting , when any one computer send the information to the switch,then the send this information to all other computer. the problem with this is collision happens if the multiple sender send the information.instead of sending information to only destination computer, its sending to all , there is wastage of bandwith.

Switch:

-it is mainly used in the lans and wans to connects the computer and forwarding data to destination computer

-the switch get source mac address and destination mac address,so it is used to send to particular mac address

Firewall:

-the firewall is present between the internet and your network.

-firewall montor the request, if the request is good then it will give the acess to enter to my network else acess will be denied.

-firewall save us from the hackers

Load-balancer:

-The function of the load balancer is to distribute the load across the server.

-as we know that if the traffic is high then the single server cant handle all the requestion , as it crashes.but the server should be available 24 hours so solution of that problem is load balancer