I have given a task to interconnect department with one another via fiber optics.
This means there will be a core switch in a server room which will interconnect these departments. The each departments are away from server room approx 900 meters and 1500 meters. Kindly tell me which fiber optics cable to use ( single mode or multi mode) and which cisco switch to use in the in the core ( server room) and in the departments (one deptt is 900 m and other is 1500 meters away from server room) . kindly also tell me which fiber optics module to use in the switch and which connector.