| DMZ | De-Militarized Zone. Refers to a network that is separate from internal LANs where sensitive information exists and public or partner access networks like the Internet. Allowing customers to view the status of their purchase orders, for example, is typcially done with a server installed in a DMZ network. Customers access the server via the Internet, but only the server itself has any access into sensitive business databases to retrieve customer order information and present it to the user.
|
| DS-3 | DS-3 is a communications protocol that delivers 45Mbps throughput, full duplex. DS-3 is commonly delivered over copper or fiber, and has a protocol similar to that of T-1.
|
| DSL |
Digital Subscriber Lines are an alternative to T-1 circuits for connecting to a Network Service Provider. DSL circuits have distance limitations not imposed by T-1 circuits but can be much faster. Circuit speeds vary based upon the type of DSL technology used, the quality of the lines carrying the signal, and the length of the signal lines. Common speeds range from 144kbps to 8Mbps; send and receive rates are often different. DSL is almost exclusively used today for delivering a connection to an IP backbone, over which other services such as Internet connectivity and VOIP can be delivered. DSL is suitable for creating VPN and RAS connections across the Internet if throughput and upload speeds are sufficient.
|
