Answer each of the following: 1. O) (a) What is a network? (b) What are the elements and their functions of a typical network? Explain each one. (c) What devices are used in layers 1-3? (d) What is a message called in layer 2? Layer 3? (Gi) (a) What is a signal? (b) What is propagation? (c) What is a transceiver? 2. (a) Describe the traditional Peer-to-Peer network model. What are the advantages and disadvantages? What is a common way to share resources? b) Discuss the basic elements common to all Client/Server Networks and the common network topologies including the advantages and disadvantages. 3. Discuss the following services a. Access Services b. Communications Services c. Management Services 4. (a) Describe the OSI Reference Model -the 7 layers and their functions. Draw a figure and label each layer. (b) Describe the hybrid model (from the Xerox copy'on BlackBoard). Explain the standards used in TCP/IP and Hybrid Models