| 1: | Define the term access rate (link speed). |
| A1: | The link speed determines how rapidly (maximum rate) the end user can inject data into a Frame Relay network. |
| 2: | What is the recommendation for setting the committed interval Tc in Frame Relay? |
| A2: | Tc should be set to four times the end-to-end transit delay. |
| 3: | Define the committed information rate (CIR). |
| A3: | CIR is the allowed amount of data that the network is committed to transfer under normal conditions. |
| 4: | Define the excess information rate (EIR) |
| A4: | EIR identifies the bits transmitted per second, over the time period of Tc, which are beyond the committed information rate. |
| 5: | Define the explicit congestion notification types. |
| A5: | Normal, mild, and severe congestion. |
| 6: | What is the area of operation of UNI in Frame Relay. |
| A6: | The UNI operation area is locally defined between the DTE/DCE peers. |
| 7: | Define the area of operation of NNI. |
| A7: | The NNI interface is concerned with the transfer of information between two network nodes that belong to two different Frame Relay networks. |
| 8: | Name the three Frame Relay multicast messages. |
| A8: | Addition, Deletion, Presence. |
| 9: | If n is the number of connected routers, define the number of physical connections in a full-mesh topology. |
| A9: | n x )(n 1) / 2. |
| 10: | Name the two main methods to control congestion in Frame Relay networks by using explicit notification: |
| A10: | Rate adoption algorithm and consolidated link-layer management (CLLM). |
| 11: | What is transit delay? How do you obtain a rough estimate of transit delay? |
| A11: | This term refers to the time to send a frame across the link between two points. The delay is a function of the access rate of the link, distance, and the size of the frame. A rough estimate can be obtained by the equation Delay = frame size / link access rate. |
| 12: | Name the four main specific and common specifications of LMI. |
| A12: | Virtual circuit status messages, multicasting messages, global addressing messages, and simple flow control. |
| 13: | Name the three LMI types that are supported by Cisco. |
| A13: | Cisco, ANSI , Q.933a. |
| 14: | Can InARP run without LMI? |
| A14: | No, because InARP LMI messages determine which PVC to map. |
