| 1: | Name the most common ISDN switch types in the U.S. and Canada? |
| A1: | basic-5ess, basic-dms100, basic-ni1. |
| 2: | Type a command that sets up the switch-type NI1 for a Cisco IOS Software ISDN router in global configuration mode. |
| A2: | Router(config)#isdn switch-type basic-ni |
| 3: | Type a command to define a local pool of 63 IP addresses for your core router, starting with 20.18.15.1, if the pool name is LOCAL_POOL. |
| A3: | router(config)#ip local pool LOCAL_POOL 20.18.15.1 20.18.15.62 |
| 4: | What is the theoretical maximum number of ports in PAT? |
| A4: | The total number of these ports is theoretically 2 16 = 65,536. |
| 5: | How much memory consumes one NAT translation? |
| A5: | Each NAT translation consumes about 160 bytes of memory. |
| 6: | Name at least five protocols that are supported by Cisco IOS Software NAT. |
| A6: | HTTP, TFTP, Telnet, Archie, Finger, NTP, and NFS. |
| 7: | In the case of the virtual interfaces, what happens with the route when the connection is tear-down? |
| A7: | In the case of the virtual interfaces, because of his dynamic nature, the route is gone as soon as the connection is gone. |
| 8: | Name three main functions of multilink systems. |
| A8: | Multilink systems must do the following: receive PDUs of a negotiated size ; combine multiple physical links into one logical link (bundle); receive and reassemble upper-layer protocol data units (PDUs). |
| 9: | Why would you use multilink PPP between a remote office and corporate headquarters? |
| A9: | To increase bandwidth and reduce network latency. |
| 10: | On which interface types can you use multilink PPP? |
| A10: | On any interface that supports DDR rotary groups and PPP , including ISDN , synchronous, and asynchronous lines. |
| 11: | What does the MRRU stand for and at which stage of the PPP protocol is it used? |
| A11: | MRRU stands for Maximum Received Reconstructed Unit (MRRU). It is used during LCP negotiation to indicate to its peer that it is willing to be included in the multilink bundle. |
| 12: | What is the purpose of using the endpoint discriminator (ED) option in MP? |
| A12: | The ED option determines which bundle to add the link to, and its primary use is to generate uniqueness in identifying MP bundles. |
| 13: | What Cisco IOS Software command displays the status of the stack group members ? |
| A13: | The show sgbp command displays the status of the stack group members. |
| 14: | Name the five possible states of the peer in the stack-group. |
| A14: | The five possible states for a peer in the stack-group are the following: IDLE, CONNECTING, WAIT_INFO, AUTHOK, and ACTIVE. |
