Hello all !!! Today we are going to learn how we can monitor or network and its diagram by looking into application and transport layers. You all know in the OSI model system there are seven layers and in the TCP model system there are four layers. We’ll look the data travel system and layer information of that two layers.
Network monitor of network diagram by looking the network layers
We’ll do this work virtually using a simulation software. That simulation software is Cisco packet tracer. If you don’t have cisco packet tracer, please download and install. It is recommended to use cisco packet tracer latest version. If you don’t have cisco packet tracer, you can have a look at this blog to get the latest version of cisco packet tracer. So lets start designing of our desired network. We’ll design a network, which’ll have 6 elements:
So we can say that IP implementation is successful. After that we’ll configure the DNS server as a host to browse a web page from a PC. And we’ll also do the network monitor of this network diagram. We’ll look the traveling of packet with the help of simulation mode of the packet tracer. We’ll specially monitor network for the DNS, HTTP and UDP service of the network.
To enable DNS, just enter the Eagle server. At first you need to power on the DNS server. After that, go to the “Services” tab. Here you also need to power on the DNS and HTTP service. You need to active these two services. Because we want to monitor network for HTTP and DNS service. So it can say that, you have already activated these two services. Now you need to configure DNS server to browser a web page.
To configure DNS service just click the DNS, which stays under the service menu. After that, in the box beside name, put the web address or web URL you want to configure. Here as a example we have place www.whilenetworking.com . When we’ll browse the eagle server from the PC, then we’ll be able to see that web page. If we want we can also change the web page content.
So our network configuration is done. To check that our network configuration is ok or not, we’ll test it through a packet. Click the message icon (close envelope) and after that click it in the PC 1B and after that click it in the Eagle server. Now have a look at the event window, which stays at the right bottom. If the packet travels from PC to the Server, then you’ll get a successful message. If not, then you’ll get a failed message. Sometimes, at the first attempt, you may get the failed message. If you get failed message at the first attempt, then don’t worry. Try second time. Hope that you’ll get success message this time.
Now we’ll have a close look at the network monitor. We’ll monitor network in the simulation mode. Just click the simulation mode. The simulation mode stays by the side of real time mode, which stays in the right bottom side of the cisco packet tracer.
Now click the edit filter, Here you should select the services you want to monitor for your network. So here you need to select the DNS, HTTP, ICMP, TCP UDP services. After that, click the PC 1B. Go to the Desktop tab and click the browser. In the address bar of the browser, type www.whilenetworking.com . After that click the Auto Capture / Play. Now you can able to do your task of network monitor. Because through this, you can able to check the travelling path of the packet. We there is completion of packet, you’ll see the web page in the browser. So in this way you can monitor network. If you want to see the layer information, click the square box of DNS, ICMP etc. which stays the event window. The boxes are really nice looking with their color.
The work done here using a packet tracer file. If you want you can download this file. For your better practice, I’ve uploaded it to google drive. Here is the download link of that packet tracer file:
If you want you can enjoy this video, which is made by me for your better understanding.
So, we are in the last of this post. If you have any kinds of opinion or comment about this post, feel free to comment.
Thanks for your time and also thanks for your visit. Keep visiting and sharing your knowledge.