1.Compare and contrast Circuit-Switched networks and Packet – Switched networks. Give examples of each to support your claims.

2.What is the purpose of CHECKSUM in error detection and correction? In your own words summarize how CHECKSUM functions.

3.a) What is the purpose of cladding in an optical fiber?

b) How does sky propagation differ from line-of-sight propagation?

c) What is the difference between omnidirectional wave and unidirectional wave?

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