How many types of replica placement strategy exist?

Related questions

1. What is eventual consistency in Cassandra?
2. Does Cassandra use consistent hashing?
3. What is compaction in Cassandra?
4. How does update work in Cassandra?
5. What is tombstone in Cassandra?
6. What is Gc grace period in Cassandra?
7. How does Cassandra DB work?
8. How is Cassandra NoSQL?
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Tags

1. #means
2. #cassandra
3. #nodes
4. #copies
5. #there
6. #point
7. #three
8. #factor
9. #ensuring
10. #kinds
11. #different
12. #while
13. #replication
14. #single
15. #strategies
16. #failure