Protocol 

Destination IP address

Port

Version

it retransmits the ARP request to a server that manages the IP-MAC addresses correspondence

it sends an ARP response in broadcast on the network

it sends an ARP response to the machine that sent the request

it sends an IP packet , in response to the ARP request, to the machine that sent the request

It will be able to convert its MAC address into an IP address

It will not be able to send the IP packet

It sends in broadcast and the machine in question accepts the packet

It sends using the address of the router

172.16.32.0/16

172.18.0.1/16

172.33.0.0/16

172.20.0.64/16

The error check sequence

The destination IP address

The preamble of the Ethernet frame

The destination MAC address

If a collision occurs, it is the physical layer that will manage the detection and retransmission of the message

If a collision occurs machine A might not be aware of the collision, other layers will detect the loss and ensure retransmission

If machine A detects the collision, it will ask layer 3 to retransmit

If a collision occurs, machine A will, in all cases, be aware of the collision

TCP

IP

ARP

UDP

A switch links the MAC addresses of the network machines to their IP addresses in a table

If the switch does not know the destination MAC address, it will reject the message

When the switch receives a message from a sender it does not know, it will broadcast the message to the entire network

When the switch receives a message from a sender it does not know, it will link the sender's MAC address to the port number (port where the cable is connected on which it receives the message) in its switching table

IP adresse of the router connected to the network of A

IP adresse of the router connected to the network of B

IP adresse of B

A and B can use different Layer 2 protocols

A and B can use different Layer 3 protocols

All protocols of the different layers must be the same on both machines

A and B may use different methods of accessing the medium