1. In a network with 10 computers the number of separate cables used for connections is 45. Which one of the following types of connection is the most likely used configuration: a. Mesh b. Star _c. Ring d. Bus 2. Which one of the following is a component of a data communication system a. Securitv b. Point-to-point connection c. Message d. Performance 3. Which one the following topologies makes a network most susceptible to failure due to break of a link between two nodes: a. Mesh b. Bus c. Ring d. Star 4. Switched WAN refers to connection of end systems through a. switches b. routers c. hubs d. national ISPs 5. Which one of the following statements is true? a. Telephone network is mostly circuit switched b. Internet is mostly packet switched c. MAN can be circuit switched d. More than one answer is correct 6. Which one of the following statements is true? a. Physical topology cannot be different from logical topology b. In Mesh topology data sent by one node is shared by all nodes c. Logical topology specifies how data on medium is shared among nodes d. More than one answer is correct