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Network Topologies

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What is network? Network topology is the arrangement of a network. Point-to-Point Topology Description Point-to-point topology are two devices directly connected to each other. Diagram Advantages Directly connected to each other so it is faster when sending messages. It is easy to set up the network. Disadvantages Only 2 host can connect to each other. Cannot send messages when one PC is broken. Bus Topology Description The devices are connected in one cable only. Diagram Advantages It is not expensive. It is easier to add another devices. Disadvantages If 1 device is broken in the cable, the other devices cannot send messages. There will be traffic if many hosts sent at a time. Star Topology Description One network device are connected to many hosts. Diagram Advantages There is no traffic. If 1 PC is not functioning, the others are not affected. Disadvantages It is expensive because network device a...
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Data Validation

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Code # Name: Muhamad Raziq Aiman bin Haji Rosman # Version: Python 3 # Date: 24 January 2018 validcharacters = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ " while True : var1 = input ( "Enter your name:" ) if all (char in validcharacters for char in var1): print ( "Your name is " + var1) break print ( "That's invalid, please try again. Please enter characters A-Z and space only" ) def input_number (message): while True : try : userInput = int ( input (message)) except ValueError : print ( "Not an integer! Try again." ) continue else : return userInput break age = input_number( "How old are you?" ) print ( "You are " + str (age) + " years old" ) Output
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