help with this assigment please!!

1. Which twisted pair cable category should you use on a 1000BaseT network? 2. What is the advantage of using single-mode cable on a 1000BaseLX network? 3. Which cable type would you use to connect a workstation to a regular port on a hub or a switch? 4. Which switch feature makes choosing crossover or straight-through cables easier? 5. What happens if a host goes down in star topology? 6. What might be the problem if none of the NIC lights are working? 7. What is an octet? 8. Which portion of a class C address designates the network address? 9. What is the difference between subnetting and supernetting? 10. How do you know if a host is using an APIPA address