is that hypodermis is an epidermal layer of cells that secretes an overlying chitinous cuticle, as in arthropods while dermis is (anatomy) the tissue of the skin underlying the epidermis.s that hypodermis is an epidermal layer of cells that secretes an overlying chitinous cuticle, as in arthropods while dermis is (anatomy) the tissue of the skin underlying the epidermis.
DSL is billed on a monthly basis, usually for a fixed price, and for the majority of providers it includes unlimited usage. In other words, whether you use it for email once a day, or you are a net addict and use it constantly, your bill is always the same. Once you have a DSL line, you can use all the resources of the internet in the same way as you did from a regular modem and a dial-up account.
A digital subscriber line access multiplexer (DSLAM, often pronounced dee-slam) is a network device, often located in telephone exchanges, that connects multiple customer digital subscriber line (DSL) interfaces to a high-speed digital communications channel using multiplexing techniques.ustomers connect to the DSLAM through ADSL modems or DSL routers, which are connected to the PSTN network via typical unshielded twisted pair telephone lines. Each DSLAM has multiple aggregation cards, and each such card can have multiple ports to which the customers' lines are connected.