Question

Cisco packet tracer

Q1) Do you get any changes of IP address when packet is traversing from one node to the immediate next node: My answer is no.

Explain why?

Q2) Do you get any changes of MAC address when packet is traversing from one node to the immediate next node: My answer is yes.

Explain why?

Answer 1

Whenever you click on an enticing link in a web browser the website you're looking at knows to send whatever the link contains to your computer and not your neighbour’s because your computer sends its IP address, kind of like a return address on it as an envelope but as it turns out I. P. addresses only get you as far as the modem you have in your house and these days most of us have tonnes of things connected to our routers especially wirelessly – phones, laptops, tablets, computers, to other people's phones, consoles, chrome cast who'll and they're all connected nearly all the time. Well each device on your network has something called a mac address yes even the PC's mac in this case stands for media access control it identifies which devices is which on your local network. So here's how they work when data arrives at your home from the World Wide internet.

Your router needs to decide which device to send that data to. It does this by keeping track of the mac addresses of all the devices connected to it then assigning what's called a private IP address usually starting with 192.168…………. This is also why you usually punch in those numbers to access your router's control panel through your browser this is very different from a public IP which is what the rest of the internet sees as being your I. P. address for your entire home network and what comes up when you type what's my I. P. address into Google your rotor keeps track of outbound request such as when you click on a link so when the data you want arrives at your router into taxes the correct private IP address to the data packets insuring that they got to your computer or device since all those private IPs respond to the correct mac address. Now this might understandably seem a little redundant since computer now has both a private IP and a mac address that can both individually identified but in reality you need both. Since although both the public and private I. P. stay the same throughout this process the mac addresses on the data packets are constantly being changed. They only tell the data where to go for its next hop when your data gets to the next device. The mac addresses changed in order to tell it where to go well next since your data might go through numerous servers and routers before it finally gets to your device. Mac address information is crucial even though you have a private I. P.

You may take the data I am talking about as the packet in your question.

Hope this was helpful.

Regards