How are packets addressed at the internet layer?MAC addressesPhysical addressesIP addressesTCP addresses

Packets are addressed at the internet layer using IP addresses.

Here's a step-by-step explanation:

1. When a data packet is ready to be sent over the internet, it is first broken down into smaller packets if it's too large.

2. Each of these smaller packets is then assigned an IP address. This IP address is the destination where the packet needs to be delivered.

3. The IP address consists of two parts: the network address and the host address. The network address identifies the specific network where the host (or destination computer) is located, while the host address identifies the specific machine within that network.

4. Once the IP address is assigned, the packet is sent over the internet. Routers along the way examine the IP address and forward the packet along the best path towards its destination.

5. When the packet reaches the destination network, the host part of the IP address is used to deliver the packet to the correct machine within the network.

6. If the data was broken down into smaller packets, the destination computer reassembles the packets back into the original data.

Note: MAC addresses and Physical addresses are used at the Data Link layer, not the Internet layer. TCP addresses do not exist; TCP is a protocol that uses IP addresses at the Transport layer.