VPLS is becoming a popular networking option. Its inherent Ethernet any-to-any connectivity model makes VPLS a popular choice for enterprises adding or deleting sites. Existing Ethernet users may have a simple implementation by modifying existing Ethernet equipment, which will also scale easily to meet future bandwidth needs.
HIV is an abbreviation for Human Immunodeficiency Virus. There are two main forms of HIV: HIV-1 and HIV-2. HIV-1 was discovered by Luc Montagnier and his associates at the Institute Pasteur in Paris in 1983.ince its discovery in 1983, no new modes of transmission of HIV have been discovered. HIV cannot be transmitted by touch, by insect vectors, or across fomites. Currently, blood supplies are screened for hepatitis, HIV, and other infections.
Ever since HIV-1 was first discovered, the reasons for its sudden emergence, epidemic spread, and unique pathogenicity have been a subject of intense study. A first clue came in 1986 when a morphologically similar but antigenically distinct virus was found to cause AIDS in patients in western Africa (Clavel et al.cquired immunodeficiency syndrome (AIDS) of humans is caused by two lentiviruses, human immunodeficiency viruses types 1 and 2 (HIV-1 and HIV-2). Here, we describe the origins and evolution of these viruses, and the circumstances that led to the AIDS pandemic.