Link Layer Switching questions. What is the difference between a hub and a switch? Hub is used to connect segments of a LAN. Switch forwards packets a. List at least two functions of a link layer switch. b. Why are switches said to be "self learning? What are bridges and how do they know whether to forward frames? At what layer in the Internet Architecture do they operate? What are some of the advantages of a switch over broadcast links such as busses or hub-based star topologies? Compare and contrast a router and a switch. c. d. e