How does router know which device to send packets to?

When a router receives a packet, the router checks its routing table to determine if the destination address is for a system on one of it’s attached networks or if the message must be forwarded through another router. It then sends the message to the next system in the path to the destination.

How does the NAT router know the destination address for a packet coming from the Internet?

The NAT router looks at the address translation table and determines that the destination address is in there, mapped to a computer on the stub domain. The NAT router translates the inside global address of the packet to the inside local address, and sends it to the destination computer.

How does NAT keep track of connections?

When a device connects to a server on the other side of the router, it uses a source port in its ephemeral port range. This is typically a port between 49152 and 65535 and it is randomly assigned. The NAT router records this port number as well as the destination IP address in a NAT translation table.

How does NAT know which device?

The NAT router will create a connection to the web server, using a specific source port number for that particular connection. The web server gives a response back to the NAT router on the same port number, so the router then knows which of the local machines requested it.

How do I find my NAT IP address Linux?

Use dig command for determining my public IP address:

1. Open the Terminal application on Linux or Unix.
2. Type the following dig (domain information groper) command on a Linux, OS X, or Unix-like operating systems to see your own public IP address assigned by the ISP:
3. You can also type:

Which of the following does a NAT router use to identify where a host is connected on the switch?

Which of the following does a NAT router use to identify where a host is connected on the switch? A NAT router uses Port Address Translation (PAT) to associate a port number with a request from a private host. When a return packet comes in, it is sent to the port number specified in the request.

Which device typically keeps track of connections while performing Nat?

For every outbound connection established by a local computer, the router keeps track of the ports assigned; based on that, it can route the incoming data back to the computer that’s participating in that conversation.

How does router know which port?

When a device initiates a TCP/IP session, it generates a TCP or UDP source port number to uniquely identify the session. When the router receives this packet it uses that source port number to uniquely identify the translation.