Copies of birth certificates and other personal vital records can only be obtained from the state or US possession where the documents were originally filed. Most states provide a centralized source from which birth certificates and other vital records can be ordered.opies of birth certificates and other personal vital records can only be obtained from the state or US possession where the documents were originally filed. Most states provide a centralized source from which birth certificates and other vital records can be ordered.
Tree Topology: This is a hybrid topology that combines characteristics of linear bus and star topologies. In a tree network, groups of star-configured networks are connected to a linear bus backbone cable.
Topologies are either physical or logical. There are four principal topologies used in LANs. These topologies can also be mixed. For example, a bus-star network consists of a high-bandwidth bus, called the backbone,which connects a collections of slower-bandwidth star segments. For network diagrams, see Network Topology Diagrams in the Quick Referencesection of Webopedia.