Please do all of them starting from 2.5 thank you

a truebe cable provides the best performance? Laser 2.5 Which light source for a fiber Neither of these c. a. Light Emitting Diode 2.6 Cable that sends only one bit at a time is a.serial b. parallel c. shielded twisted pair d. plenum-rated 2.7 What is plenum-rated cable? a. Cable specifically designed to be enclosed in a raceway b. The patch cable that goes between the wall outlet and the host c. All CAT6 cable is plenum-rated d. Cable that creates minimal smoke or toxic fumes when exposed to a fire 2. Sketch 5 hosts in each of the following topologies: bus, ring, star, and full-mesh. For each statement below, say whether it applies best to a bus, ring, star or full-mesh topology 3. a. Bus b. full meshMost robust Requires terminating resistors in Network will fail if the central connecting device fails 10. Assume you provide the tech support for your office, which uses a wired Ethernet. All users report that they have no network access. Put an X in front of the two most likely causes of the failure. The NIC card in one computer has failed The switch has failed There is a break in one horizontal cable Loss of power to the equipment room