What is the role of layers in the Internet Protocol Stack?

Group of answer choices

Implementing the complete set of protocols needed for an end$-$to$-$end communication between two users.

Limiting the implementation complexities of a service within that layer by defining the service it requires from the lower layer and the services it provides to the higher layer.

Defining a set of rules for connecting ISPs and IXPs to design the architecture of the Internet for providing global access.

Defining format, order of messages sent and received among network entities, and actions taken on message transmission, receipt.