Final answer:
EIGRP uses bandwidth and delay as its default metrics for determining the best path, whereas load, reliability, hop count, and MTU are considered but not used by default in metric calculation.
Step-by-step explanation:
The student is asking about the default metrics that Enhanced Interior Gateway Routing Protocol (EIGRP) uses. By default, EIGRP uses bandwidth and delay as its composite metrics to determine the best path to a destination network. While EIGRP is capable of using other metrics such as load and reliability, those are not used by default. Other metrics like hop count and Maximum Transmission Unit (MTU) are considered, but these do not influence the routing decision in the default configuration of EIGRP. MTU is communicated between routers but does not play a role in metric calculation.