LDAP
Lightweight Directory Access Protocol (LDAP) is a service that allows anyone to find the network of organizations, individuals or other resources such as files or installation of a software agreement, whether public Internet or corporate intranet. As the name suggests, LDAP is a "lightweight" (smaller code, smaller amount of code) version of DAP (Directory Access Protocol), DAP is the Internet part of the X.500 directory service standards. LDAP security Ershi because they do not contain the code is relatively small.
LDAP was invented by the University of Michigan, there are already 40 companies use, such as Netscape this has been included in the latest version of the Communicator suite of products, it is also Microsoft's Outlook Express and other products to join a project entitled "Active Directory" in the . Novell's NetWare Directory Services with LDAP-compatible, Cisco products also support the network.
In the network, the directory can help find the location of a specific object. In the TCP / IP networks (including the Internet) in relation to a specific network location of the network name, constitutes the directory system called Domain Name System (DNS). LDAP can help to find individuals, even if their position is not clear.
LDAP directory, for a layer of tree branches out from the root directory, sub-national, regional, organizations, small organizations and individuals. The entire directory spread across many servers, each server is a whole branch of Figure reproduced regularly synchronize the information. An LDAP server, called the Directory System Agent (DSA), Office receives requests from the user instructions and, if necessary passed on to other DSA, and to ensure that there is a single server can be a real mission.
Leaf
Tree (TREE) structure of a branch of the bottom, under which there is no other point.
Lease Line
Lease Line is a data communications easiest and most important part. Line has the advantage of easy work of Cha Xiu convenience, its degree of service performance and preparedness will be as high as 99.99%.
Dedicated bandwidth usage degree of poor; actually a result of using TDM technology, bandwidth allocation specified first. If every line no use, others can not use. On the bandwidth utilization can be described in terms of effectiveness had not been apparent.
The cost of line is proportional to the distance and communication.
LED (Light Emitting Diode)
LED will become the new darling of the future of e-generation, so countries around the world are flocking to invest enormous human and material resources will want to place on the R & D milestones, ITRI Opto-Electronics is integrating the optoelectronic semiconductors upper, middle and lower reaches of industry efforts with the support to invest in developing lighting white LED, in recent years, nitrides semiconductor industry has become a popular research and development of major projects.
These include short-wavelength light-emitting diode (LED) and laser diode (LD), and even use blue LED excitation yellow fluorescent powder or the use of UV LED excitation of red, green, and blue RGB fluorescent powder can be to produce white LED, but how to complete the Flip Chip packaging technology to enhance GaN / Sapphire grain size of the luminous efficiency, how to improve the High power cooling techniques, how to complete the multi-die modules, and flip-chip-type LED Chip Optical Light design to the hair near UV380nm ~ 410nm fluorescent powder to provide the LED lighting industry in developing energy-saving, environmental protection and the use of white LED, Opto-Electronics R & D has become the main topics. |
