Windows 10: Does every network layer device changes the source IP address in a packet?

Does every network layer device change the source IP address in a packet?


As an example, Router when receives a packet from private network, changes the source IP to its own IP and maintains the record in NAT table to keep track of which machine requested what.


Or is it that Router is the only network layer devices in the journey of message from one network to another??

:)

 

Networking Speed Up

This is not correct. A switch is a layer 2 device (Datalink Layer) and uses Mac address lookup for packet switching. Routers are layer 3 devices (Network Layer). There are also Layer 3 switches that work similar to a router (at the Network Layer) but utilize switching hardware to accomplish the task making them faster than routers on Layer 3.

It is correct, however, that the switch is unaware of the IP, as it uses the MAC address in the frame header for its routing information to establish a dedicated, full-duplex link to the recipient MAC address.

 

Finding IP address

Hello,

Thank you for writing to Microsoft Community Forums.

I suggest you to follow the steps mentioned below to find printer’s IP address:

1. Type Devices and Printers in the Windows search bar.
   
2. Select on the printer and click on
   Manage.
   
3. Click on the Ports tab.
   You will be able to find printer’s IP address under the ‘Ports’ tab.
   

Few printers also have a “Test print” option on the printer. When you print a test page from network printer, the page shows the IP address along with other details.

Note: If it is set on DHCP mode the IP address will constantly change.
The IP address is assigned automatically by your router using a protocol called DHCP.

Hope it helps.

Sandeep Kumar M

Microsoft Community – Moderator

 

IP ADDRESS

This problem usually sorts itself out automatically, but see the following for some suggestions:

https://www.online-tech-tips.com/computer-tips/ip-address-already-in-use/

If you keep getting these notifications, chances are that some device on your network is configured to use a static IP address that is within the range of addresses allocated by your router's DHCP server.

If you need some help in sorting out a situation like this, please provide the following information:

• the make and specific model of your router
• the make and specific model of every device connected to your network, including printers, TV set top boxes, Internet of Things (IoT) devices, etc.

If you have many devices connected to your network, download and run Advanced IP scanner (Advanced IP Scanner - Download Free Network Scanner.). This will list all of your currently-connected
network devices and show their IP addresses.