Quick Noob Memory Question

[Mikoyan]

Hi guys quick question in terms of memory settings for my memory i see:

PC6400 800MHz CAS 4-4-4-10

Just what are these numbers?

I presume the first would be:

4 - DRAM CAS Latency

4 - dont know :/

4 - dont know :/

10 - dont know :/

can anyone please help me?

thanks!