Define Network Management. Explain network management, goals and functions, necessary function grouping figure. What are the challenges of information technology managers in managing the network? Define Analogy of telephone Network Management? Explain about the network topology in the perspective of network management. Write a note on (i) VLAN (ii)WAN (iii)FDDI (iv) Token Ring Draw and explain the broadband services network. Enumerate and explain the functions and applications of hubs and bridges Explain the principle advantages of ISDN with neat diagrams.