ccna 1 practice final exam online

ccna 1 practice final exam online.of end-to-end connectivity.The logical communication path between each pair of DTEs is called a VCO The three parallel lines shown in the diagram represent a single VCO The book is shown as a thick dashed line so that the reader can more easily notice such lines. Usually, the service provider pre-configures all the details required by the VC, and the predefined VC is called a PermanentVirtual Circuit (PVC)0The router uses the Data-LinkConnectionIdentifier (DLCI) as the Frame Relay address; it identifies the VC through which the frame transmission should pass.So, as shown in Figure 13-2, when R1 needs to forward a packet to R2, R1 first encapsulates the Layer 3 packet into a Frame Relay header and tail, and then sends this frame out. The Frame Relay header includes the correct DLCI so that the service provider's Frame Relay switch can forward the frame to R2 correctly.Table 13-2 lists the components and related terminology involved in Figure 13-1 and Figure 13-2. This is followed by a more detailed explanation of the most important features of Frame Relay. "........ Table 13-2 Frame Relay Terms and Concepts1... DaylightVirtual Circuit (VC) The logical concept of a path for a frame to travel between two DTEs. VCs are particularly useful when comparing Frame Relay with leased physical circuitsPermanent Virtual Circuit (PVC) A predefined VC. conceptually, a PVC is equivalent to a leased lineConceptually, an SVC is equivalent to a dial-up connectionData Terminal Equipment (DTE) DTEs are devices that are connected to the Frame Relay service provided by the communications company. Usually they are placed where they are required to be used by the purchasing Frame Relay service company