It’s best to keep an open mind, and then ask for the information you want to know. If you do this right, you might find your answer.
While it’s true that some ISPs only use either the DHCP request or the reply with the request, this is not the case for all ISPs. For instance, the majority of ISPs send their request to both parties, meaning they might use either of these two message types to get the information they need.
DHCP offers and replies are two different messages. DHCP offers are used to check if a DHCP server is available for you. They are not used to check if a server is up and responsive for a given address. You can use both types of message during a successful assignment.
This is a good example because it’s a message type that’s not used for most ISPs, but it’s also true that it’s used for all ISPs. As an example, if someone says to you, “I’d like to talk to my ISP again,” it would not mean you should stop trying. A request can be a request, but it doesn’t mean you shouldn’t try, just that you should try to talk to a different ISP.
This is a good example because the message type is used for specific purposes, like responding to a request, and so it is not used for a general ISP message type. However, its used for almost all messages.
This is an example because the message type is used for specific purposes, like responding to a request, and so it is not used for a general ISP message type. However, its used for almost all messages.