Question: 2 System models 2.1 In the Early distributed systems (letter corresponding to the correct answer) a. nodes were interconnected by a network of networks (Internet).

2 System models 2.1 In the Early distributed systems (letter corresponding to the correct answer) a. nodes were interconnected by a network of networks (Internet). b. nodes were interconnected in a LAN. c. the openness was significant. d. the level of heterogeneity was significant. (letter corresponding 2.2 From a system perspective, communicating entities are: to the correct answer). a. objects. b. web services. C. processes. d. components. (letter 2.3 Which of the following lists the communication paradigms types: corresponding to the correct answer) a. UDP sockets, TCP sockets, Multicast b. Request-reply protocol, Remote procedure call, Remote method invocation c. Group Communication, Publish-subscriber, Message queues d. Inter-process communication, Remote invocation, Indirect communication 2.4 A store of recently used data objects that is closer to one client or a particular set of clients than the objects themselves is a: _(letter corresponding to the correct answer) a. Layering strategy b. Placement strategy Architectural style d. Architectural pattern C. 2.5 Explain what are Architectural Patterns. List the most important architectural Patterns

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