DMA Direct Memory Access
Direct Memory Access, a way for devices to directly read and write memory (MEMORY) without having to processor (PROCESSOR) technology can reduce the burden on the processor to improve data transfer rates.
DNS Domain Name System or Domain Name Service
A INTERNET service, the domain name will be converted into actual IP location. Because the domain name (DOMAIN NAME) compared with the number of IP location easy to remember, so most of the time refer to the use of the domain or host domain names with the host Name (HOST NAME), but in fact the operation of the INTERNET is to use IP location, DNS service will convert it, such as input WWW.ECHO1.COM the location of columns in the browser, the Network Systems program will be asked to DNS host name to be conversion obtained 209.204.230.226 the IP location. Theoretically that all DNS queries between hosts another way to obtain conversion data, the system just enough to specify a DNS host, but when the system can not connect on the specified DNS host, Domain says it can not be converted, so you may specify more than one DNS host, the system in order to find the specified query Ke Yi DNS hosting services.
Domain Network
Domain, a group belonging to the same network (NETWORK) a collection of computers. In the Internet (INTERNET), the domain is defined as the same IP network number (NETWORK ID) of a group of computers and networks.
DoS & DDos attacks & denial of service distributed denial of service attacks
Through the use of large amounts of data flow, irregular packet sizes, a deliberate violation of the agreement, the the main equipment, etc., so that network can not function properly. As for the "victim" host, application buffers, and other technology led to the proliferation of packet "more than bandwidth."
In general, these attacks are from a single machine to a specific host to launch the aim of attempting to make the processor is overloaded, or exclusive host of bandwidth, so that legitimate users can not use this resource.
DoS and the DDoS is similar to the manner, however, they are launched from multiple machines. Most of the DDoS attack, Taiwan has suffered through one of the machines against pre-set code, also known as "Host" to start, so remote or "host" machine can make a command to the "Host "attack at any time. |
