Question

List the fields and their size in the ARP Message format.

Answer 1

The ARP message format consists of several fields including hardware type, protocol type, hardware address length, protocol address length, operation, sender hardware address, sender protocol address, target hardware address, and target protocol address.

Step-by-step explanation:

The ARP message format consists of several fields:

1. Hardware Type: This field specifies the type of hardware address being used, such as Ethernet. It is represented by 2 bytes.
2. Protocol Type: This field specifies the type of protocol address being used, such as IPv4. It is represented by 2 bytes.
3. Hardware Address Length: This field specifies the length of the hardware address in bytes. It is represented by 1 byte.
4. Protocol Address Length: This field specifies the length of the protocol address in bytes. It is represented by 1 byte.
5. Operation: This field specifies the type of ARP message, such as request or reply. It is represented by 2 bytes.
6. Sender Hardware Address: This field contains the hardware address of the sender. Its size depends on the value specified in the Hardware Address Length field.
7. Sender Protocol Address: This field contains the protocol address of the sender. Its size depends on the value specified in the Protocol Address Length field.
8. Target Hardware Address: This field contains the hardware address of the target. Its size depends on the value specified in the Hardware Address Length field.
9. Target Protocol Address: This field contains the protocol address of the target. Its size depends on the value specified in the Protocol Address Length field.