Silver Socks class help

[ziimariebii]

For this sock, all I did was purl 2, knit a 4 stitch cable, purled 2 more, knit the center 16, purled 2, knit a 4 stitch cable (twisting in the opposite direction) and purled the last two. Then knit all stitches on the sole of the sock.

(I could have just as easily knit cables all the way across the top by doing a pattern like this: P2, Cable 4, P2, C4, P2, C4, P2, C4, P2, C4, P2)


what does knit a 4 stitch cable mean?
What am and how do I twist a 4 stitch cable in the opposite direction (what does this mean)?
What does she mean by knit cables all the way across the top?

Thanks for your help...