Which two of the following LTM load balancing methods require the least amount of resources? (Choose two.)

Round robin distributes new connections sequentially across pool members using only an incrementing counter, requiring zero server health data collection or scoring calculations, making it the least resource-intensive option available.

Ratio load balancing routes connections according to static administrator-defined weight values assigned to each member at configuration time, requiring no runtime monitoring or dynamic metric gathering beyond reading those fixed values.

Observed is a dynamic method that continuously tracks both active connection counts and response times for each server to compute a score, requiring persistent metric collection and mathematical scoring on every interval.

Fastest monitors actual response time for each pool member by timing server responses and always routes new requests to the lowest-latency server, requiring active per-server latency measurement at runtime.

Predictive extends the Observed method by applying trend analysis to historical performance data to anticipate future server capacity, incurring higher computational overhead than any purely reactive dynamic method.

Least connections maintains a real-time counter of active connections per pool member and must update those counters on every connection open and close event, requiring continuous shared state tracking across all sessions.