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After studying this unit you should be able to: - evaluate technical descriptions of communication protocols and demonstrate your understanding of their operation; - describe the characteristics of circuit-switched and packet-switched networks, and of connectionless and connection-oriented modes in packet-switched networks; - describe the role played by primitives in the OSI reference model; - explain how ‘vertical’ and ‘horizontal’ communication takes place in the OSI reference model; - describe the main functions of the principal protocols in the TCP/IP architecture; - describe how application software interacts with the TCP/IP protocol software through application program interfaces; - find the network and host addresses from IPv4 addresses; - describe the main functions of each of the layers of the ATM reference model; - explain the role that virtual path identifiers and virtual channel identifiers play in forwarding ATM cells; - describe how label switching can support IP over ATM.
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