Question

Please read the question carefully and then provide the answer thanks.

Discussion Topic

Choose a TCP/IP service, such as a web browser, email, file transfer, remote shell, DHCP, DNS, network time protocol, network address translation, etc.

Important!

• Everyone should pick a different service, if possible, to keep the discussion fresh.

In your original post, answer the following about the service you have chosen:

• How would you determine the IP addresses of your devices on your network?

Success Hints

You can use ipconfig if you use the command line.

You can use whatismyipaddress.com if you have connectivity on your devices.

• Using Google, determine how to look up your IP address in the Windows 10 GUI.
• How would you determine if your devices are able to communicate on your network?

Success Hint

You can use ping on your computers. How would you do it on your mobile devices?)

• Using ipconfig, how do you determine the IP address of your home router?
• Trace a request and a response with the help of a diagram of the TCP/IP service that you chose.
• Follow the request and response through each of the TCP/IP layers.
• Describe what happens at each layer of the OSI and TCP/IP reference models.

Answer 1

Q. Discussion Topic

Choosing File Transfer service sftp over TCP protocol:

Basically Sftp is a service which is used to fransfer files over secure shell ssh in a network from one device to other. For this we get a sftp shell. It is an encrypted service over ssh which is an additional security layer over ftp. FTP user port 20, 21 and SFTP user port 22 which is similar to ssh. For accessing sftp either we can use terminal( In Linux), Putty (In windows) and scp (in linux), WinScp ( In Windows). We can use FTP as a centralized server to serve files to all the connected devices over a network.

Q. How would you determine the IP addresses of your devices on your network?

To determine all the devices over a network, we can use arp command which is basically address resolution protocol. Arp sends query to the router and through that all devices. If a device is up, it sends ACK signal to the query machine and ARP stores the ip and hostname in ARP table and shows us.

Q. Using Google, determine how to look up your IP address in the Windows 10 GUI

You can see your public IP address on google by just searching what is my ip on google.

Q. How would you determine if your devices are able to communicate on your network?

To determine whether a device is communicating in a network we can use ping command. If we get a ping that means the machine is communicating in and out the network. For mobile devices we can simply by setting a ftp server over network and we can try opening it on mobile browser. If mobile device is communicating, it would successfully show the ftp listing on browser.

We can also use telnet if we have to see whether a service is listening or not.

Hope answer is helpful to you.