Quick jet engine Question

[z.khalid]

Does the air pass through the Low pressure compressor of a turbofan first?
An instructor today said it was the HP compressor, though I read it is the LP compressor.

Also, what does this mean exactly?
"High bypass turbofans have larger bypass ratios, sometimes on the order of 5:1 or 6:1, compared to the low bypass turbofans which have a bypass ratio of around 2:1.

Thanks