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- Question
Which of the following are types of flow control?
- Buffering
- Cut-through
- Windowing
- Congestion avoidance
Options- A. 1 and 2
- B. 1, 3 and 4
- C. 2 only
- D. 3 only
- Correct Answer
- 1, 3 and 4
ExplanationThe common types of flow control are buffering, windowing, and congestion avoidance. - 1. Which of the following are unique characteristics of half-duplex Ethernet when compared to full-duplex Ethernet?
- Half-duplex Ethernet operates in a shared collision domain.
- Half-duplex Ethernet operates in a private collision domain.
- Half-duplex Ethernet has higher effective throughput.
- Half-duplex Ethernet has lower effective throughput.
Options- A. 2 only
- B. 1,2 and 3
- C. 1 and 4
- D. 4 only Discuss
- 2. Which of the following command options are displayed when you use the Router# show frame-relay? command?
- dlci
- neighbors
- lmi
- pvc
- map
Options- A. 1 only
- B. 2 and 4
- C. 3, 4 and 5
- D. All of the above Discuss
- 3. How should a router that is being used in a Frame Relay network be configured to keep split horizon issues from preventing routing updates?
Options- A. Configure a separate subinterface for each PVC with a unique DLCI and subnet assigned to the subinterface.
- B. Configure each Frame Relay circuit as a point-to-point line to support multicast and broadcast traffic.
- C. Configure many subinterfaces in the same subnet.
- D. Configure a single subinterface to establish multiple PVC connections to multiple remote router interfaces. Discuss
- 4. Which command will display the CHAP authentication process as it occurs between two routers in the network?
Options- A. show chap authentication
- B. show interface serial 0
- C. debug ppp authentication
- D. debug chap authentication Discuss
- 5. When a router is connected to a Frame Relay WAN link using a serial DTE interface, how is the clock rate determined?
Options- A. Supplied by the CSU/DSU
- B. By the far end router
- C. By the clock rate command
- D. By the Physical layer bit stream timing Discuss
- 6. Which three statements are true about the operation of a full-duplex Ethernet network?
- There are no collisions in full-duplex mode.
- A dedicated switch port is required for each full-duplex node.
- Ethernet hub ports are preconfigured for full-duplex mode.
- In a full-duplex environment, the host network card must check for the availability of the network media before transmitting.
- The host network card and the switch port must be capable of operating in full-duplex mode.
Options- A. 1, 2, and 5
- B. 2 and 4
- C. 2, 3 and 4
- D. 5 only Discuss
- 7. What are two purposes for segmentation with a bridge?
- To add more broadcast domains.
- To create more collision domains.
- To add more bandwidth for users.
- To allow more broadcasts for users.
Options- A. 1 only
- B. 2 and 3
- C. 2 and 4
- D. 4 only Discuss
- 8. Routers operate at layer _____. LAN switches operate at layer _____. Ethernet hubs operate at layer _____. Word processing operates at layer _____.
Options- A. 3, 3, 1, 7
- B. 3, 2, 1, none
- C. 3, 2, 1, 7
- D. 3, 3, 2, none Discuss
- 9. Which of the following describe router functions?
Options- A. Packet switching
- B. Packet filtering
- C. Internetwork communication
- D. Path selection
- E. All of the above Discuss
- 10. A receiving host has failed to receive all of the segments that it should acknowledge. What can the host do to improve the reliability of this communication session?
Options- A. Send a different source port number.
- B. Restart the virtual circuit.
- C. Decrease the sequence number.
- D. Decrease the window size. Discuss
Internetworking problems
Search Results
Correct Answer: 1 and 4
Explanation:
Unlike full duplex, half-duplex Ethernet operates in a shared collision domain, and it has a lower effective throughput than full duplex.
Correct Answer: 3, 4 and 5
Explanation:
The
show frame-relay ? command provides many options, but the options available in this question are
lmi,
pvc, and
map.
Correct Answer: Configure a separate subinterface for each PVC with a unique DLCI and subnet assigned to the subinterface.
Explanation:
If you have a serial port configured with multiple DLCIs connected to multiple remote sites, split horizon rules, stop route updates received on an interface from being sent out the same interface. By creating subinterfaces for each PVC, you can avoid the split horizon issues when using Frame Relay.
Correct Answer: debug ppp authentication
Explanation:
The command
debug ppp authentication will show you the authentication process that PPP uses between point-to-point connections.
Correct Answer: Supplied by the CSU/DSU
Explanation:
Clocking on a serial interface is always provided by the CSU/DSU (DCE device). However, if you do not have a CSU/DSU in your nonproduction test environment, then you need to supply clocking with the
clock rate command on the serial interface of the router with the DCE cable attached.
Correct Answer: 1, 2, and 5
Explanation:
Full-duplex means you are using both wire pairs simultaneously to send and receive data. You must have a dedicated switch port for each node, which means you will not have collisions. Both the host network card and the switch port must be capable and set to work in full-duplex mode.
Correct Answer: 2 and 3
Explanation:
Bridges break up collision domains, which allow more bandwidth for users.
Correct Answer: 3, 2, 1, none
Explanation:
Routers operate at layer 3. LAN switches operate at layer 2. Ethernet hubs operate at layer 1. Word processing applications communicate to the Application layer interface, but do not operate at layer 7, so the answer would be none.
Correct Answer: All of the above
Explanation:
Routers provide packet switching, packet filtering, internetwork communication, and path selection.
Correct Answer: Decrease the window size.
Explanation:
A receiving host can control the transmitter by using flow control (TCP uses Windowing by default). By decreasing the window size, the receiving host can slow down the transmitting host so the receiving host does not overflow its buffers.
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