Chapter 4 Information systems operations, maintenance and service management Flashcards Preview

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Flashcards in Chapter 4 Information systems operations, maintenance and service management Deck (2)
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1

what are the components for LAN?

1.Repeaters: extend the network, connect network segments together
2.hubs: physical connection devices
3.bridges: connect lan segments or enture LANs to each other
4.switches: devide, separate and interconnect network segments
5.routers: see switches above

2

What are the normalisation rules in a relational database?

Normalisation is the elimination of the redundant data.

1. For each instance of the data object there can only be one value for each attribute;
2. The attributes represent elemmentary items, that is, they contain no parts.
3. Each tuple has a primary key may have attribute values that further describe the item