1. How many networks in the above design? (1 mark) 2. What network devices can Device C & E? (2 mark) 3. What is the subnet mask set for PC1? (1 mark) 4. What is the default gateway set for labtop0? (1 mark) 5. What is the next hop for Router A? (1 mark) 6. What is the network typology in the above design? (1 mark) 7. What transmission media mostly used in the above networks? (1 mark) 8. What device(s) you need to install and configure in order to allow PCs to connect wirelessly? (2 mark) 9. If PC3 is trying to connect with other PCs but After some investigation, you find that the wire connected with device D is damaged. Which layer of the OSI model is most likely involved? (1 mark) 10. If PC2 is using internet explorer to access to a website by typing http://www.ABC.com in the URL address, Which layer of the OSI model is most likely involved? (1 mark) 11. Which network device stores the MAC addresses? (1 mark) 12. Assume that a new 'PC5' is needed and connected with device E and configured with IP address 192.168.3.2' Is there any problem with that? Explain your answer with possible solution. (2 mark)