In comparison, public domain software is not copyrighted and can be copied freely, and shareware is copyrighted and can be copied freely but must be paid for if used regularly. This area must be clear or else signal strength will weaken. Fresnel Zone is an area of concern for 2.4 GHz wireless systems. Although 2.4 GHz signals pass rather well through walls, they have a tough time passing through trees. The main difference is the water content in each.
Water absorbs the waves, and heart from the energy cooks the food.
File Transfer Protocol. FTP allows you to transfer files between dissimilar computers, with preservation of binary data and optional translation of text file formats. The simultaneous transmission of data in both directions, used when communicating between two computers. Full duplex is sometimes called Echo On by some communications programs. The name of a file plus the drive and directory where the file is located.