Please need urgently correct answers according to marks please correct don want to loose marks

(2 marks) 6.each device, state the OSI network layer it functions on and whether it can isolate a collision domain (or not) and whether it can isolate a broadcast domain (or not): OSI Layer Isolates Collision Domain (Y/N)? Isolates a Broadcast Domain (Y/N)? Device Hub Switch Router (2 Marks) 7. What is the meaning of the IP address 127.0.0.1 ? What is it used for? (2 Marks) 8. Write the IP Version 6 loopback address: (4 Marks) 9. What is the difference between a MAC address and an IP address? (i.c. define each and show the difference) (6 Marks) 10. Given the following network: 172.16.125.200/10 a) What is the network number (network portion of the address)? b) What is the host portion of the address? c) Is a host with address: 172.48.100.155 on the same subnet? Why or why not? 11.) Given the following network: 192.168.10.0/24 Subnet this network with a /25 subnet mask a) What class was the original network? (1mk)