many performance evaluations for ieee 802.11distributed coordination function (dcf) have been previouslyreported in the literature. some of them have clearly indicatedthat 802.11 mac protocol has poor performance in multi-hopwireless ad hoc networks due to exposed and hidden nodeproblems. although rts/cts transmission scheme mitigatesthese phenomena, it has not been successful in thoroughlyomit...

XML itself does not support hypermedia, but the XLink standard has been defined to make XML usable for hypermedia. One of XLinks most interesting features is its support for external links and linkbases, which makes it possible to create links between resources without having to change the resources. In order to use these links, user agents must access linkbases and query them for relevant link...

We survey the history, development and usage of directory services based on the Lightweight Directory Access Protocol (LDAP). We present a summary of the naming model, the schema model, the principal service models, and the main protocol interactions in terms of a C language application programming interface.

Quorum systems are tools for increasing the availability and eeciency of replicated services. A quorum system for a universe of servers is a collection of subsets of servers, each pair of which intersect. Intuitively, each quorum can operate on behalf of the system, thus increasing its availability and performance, while the intersection property guarantees that operations done on distinct quor...