Description of social networks, pros and cons, comparision to virtual communities

2. Social Networks: Definition
● Wikipedia: “A social network is a
social structure made of nodes (which are
generally individuals or organizations) that are
tied by one or more specific types of
interdependency”
●
Nodes: Group of people
●
Ties: Relationship (contact, friend, etc)

3. Social Network Services
● Big number of users
● People explicitly do “contacts”
● Contacts are used to communicate and find or filter
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