The brand's unique identifier for a product. Multiple product codes can be mapped to one mother product data-sheet if the specifications are identical. We map away wrong codes or sometimes logistic variants.
Global Trade Identification Number (GTIN) includes European Article Number (EAN), Universal Product Code (UPC) and Japan Article Number (JAN). They are better known as the barcode on a product's packaging to uniquely identify a product in a shop or logistic process. One product data-sheet can have multiple barcodes depending on logistical or product variants based on packaging, country, sizes, colors, etc.
Any type of network has its own type of cables. Today's standard for home and office use is Ethernet. For Fast Ethernet and Gigabit Ethernet you need at least category 5 cabling. Ethernet cables can have their connectors attached in two different ways: ordinary or cross linked. You will most likely need the ordinary version, unless you want to connect two devices directly to each other, and even then most modern Ethernet network devices will automatically detect the type of cable you are using and adapt their settings to it, so they will work with both types.