All data (digital ones and zeros) is transferred in packets which may have various sizes (numbers of bytes - each byte being eight positions for either a one or a zero) depending on the conditions...
Everything in internet is sent as 0s and 1s. Network layer operates with packets but then it passes packets to the Data layer which creates frames, and then frames are passes to the Physical layer...
Well, it depends on what you're doing. You see, it's better to be in your computer if you have a virus, so you can know what your doing or how your computer works. But if you love being on the...