TRENDnet TDM-E400 User's Guide - Page 192

TDM-E400 / TDM-C400ADSL2+ Ethernet Modem Router User's Manual download DSL Ethernet filtering filtering rule firewall FTP hop hop count host HTTP ICMP IGMP the Internet Corporation for Assigned Names and Numbers (ICANN). Domain names are a key element of URLs, which identify a specific file at a web site, e.g., http://www.globespan.net/index.html. See also DNS. To transfer data in the downstream direction, i.e., from the Internet to the user. Digital Subscriber Line A technology that allows both digital data and analog voice signals to travel over existing copper telephone lines. The most commonly installed computer network technology, usually using twisted pair wiring. Ethernet data rates are 10 Mbps and 100 Mbps. See also 10BASE-T, 100BASE-T, twisted pair. To screen out selected types of data, based on filtering rules. Filtering can be applied in one direction (upstream or downstream), or in both directions. A rule that specifies what kinds of data the a routing device will accept and/or reject. Filtering rules are defined to operate on an interface (or multiple interfaces) and in a particular direction (upstream, downstream, or both). Any method of protecting a computer or LAN connected to the Internet from intrusion or attack from the outside. Some firewall protection can be provided by packet filtering and Network Address Translation services. File Transfer Protocol A program used to transfer files between computers connected to the Internet. Common uses include uploading new or updated files to a web server, and downloading files from a web server. When you send data through the Internet, it is sent first from your computer to a router, and then from one router to another until it finally reaches a router that is directly connected to the recipient. Each individual "leg" of the data's journey is called a hop. The number of hops that data has taken on its route to its destination. Alternatively, the maximum number of hops that a packet is allowed to take before being discarded (see also TTL). A device (usually a computer) connected to a network. Hyper-Text Transfer Protocol HTTP is the main protocol used to transfer data from web sites so that it can be displayed by web browsers. See also web browser, web site. Internet Control Message Protocol An Internet protocol used to report errors and other networkrelated information. The ping command makes use of ICMP. Internet Group Management Protocol An Internet protocol that enables a computer to share information about its membership in multicast groups with adjacent routers. A multicast group of computers is one whose members have designated as interested in receiving specific content from the others. Multicasting to an IGMP group can be used to 192