The QPI _________ layer is used to determine the course that a packet will traverse across the available system interconnects.

____________________ are standard intervals between the transmissions of data frames and are used for special types of transmissions.

Fill in the blank(s) with the appropriate word(s).

A protocol that offers no built-in error-checking or retransmission capability uses which type of packet delivery?

A. low performance B. connection-oriented C. best-effort D. high priority