Short Questions three: Answer briefly. 1- hat does 10Base2 mean? 2- What are MAC addresses? 3- What is the disadvantage of a star topology? 4. What is the minimum size of the data payload in an Ethernet frame? 5- What is mean by active topology. 6- Mention the main advantages and disadvantages of ALOHA protocol? How does slotted ALOHA improve performance over ALOHAZ 7- Why star topology is commonly preferred? 8- Explain the following terms in the context of OSI: i. Service Access Point ii. Encapsulation iii. Services iv. Layers 9- Compare between datagram and virtual circuit networks. 10- What is the peer-to-peer communication in the OSI Model