Term
| What is the purpose of a TDR? |
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Definition
| It uses pulses to test for cable faults and displays them on a CRT for analysis. |
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Term
| What type of cable discrepancies can be detected by a TDR? |
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Definition
| Opens, shorts, opens and pin holes in cable shielding, kinks, and mismatched or corroded cable connectors. |
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Term
| How does the OTDR use "backscattered" light to make measurements? |
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Definition
| It correlates the returned light pulses with a location in the fiber. |
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Term
| What determines the amount of light-pulse power that is transmitted down the cable? |
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Definition
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Term
| What function of the cable scanner shows the manner in which each wire is mated to the connectors at both ends of the cable? |
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Definition
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Term
| What are the primary capabilities provided by a protocol analyzer? |
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Definition
| Digital network diagnostics and software development. |
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Term
| Explain the difference between a protocol analyzer NIC and other NICs. |
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Definition
| The NIC in a protocol anaylzer is configured to process all frames. |
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Term
| What function of the protocol analyzer excludes specific types of frames? |
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Definition
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Term
List four types of specific occurances that can be displayed by counters. |
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Definition
| Any four of the following: Packets transmitted; CRC errors; Undersize packets; Oversize packets; ARP requests; Collisions; Bit errors. |
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Term
| What menu is best used to report errors that occur at the physical layer such as bad FCS, short frames, and jabbers? |
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Definition
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Term
| What kind of information does the connection statistics menu provide? |
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Definition
| Connection statistics provide information concerning the bandwidth utilization and the number of connections that are related to specific nodes. |
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Term
| Identify the three types of active tests that are conducted with a protocol analyzer. |
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Definition
(1) Ping. (2) Trace route. (3) Traffic generator. |
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Term
| How is the 32-bit value in the FCS field calculated? |
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Definition
| It is computed as a function of the contents of all the frame's fields (source address, destination address, length/type, data) except the preamble, start-of-frame delimiter, and FCS. |
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Term
| What algorithm is used to detect multiple frames within the same collision domain? |
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Definition
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Term
| How are problems that are caused by high network utilization resolved? |
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Definition
| Increasing network bandwidth, further subdividing the network, or eliminating impairments that cause collisions. |
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Term
| What is the primary cause of jabbers on a network? |
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Definition
| Faulty NICs that constantly transmit frames onto the network. |
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Term
| What happens when oversize packets are sent across a network? |
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Definition
| Oversize packets are discarded, but some network nodes may accept oversize packets and fail. |
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Term
| What is the primary cause of undersize packets? |
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Definition
| Undersize packets are the result of software errors generated by incompatible network protocols. |
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Term
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Definition
| Frames that are smaller than the minimum size the network protocol requires. |
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Term
| How will IP fragment a 3,500-byte packet for transmission by Ethernet frames? |
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Definition
| The packet is fragmented into three packets, which are encapsulated into three Ethernet frames. |
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Term
| Name two utilities that can be used to determine round-trip delay. |
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Definition
(1) PING. (2) Trace route. |
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Term
| List the types of errors that are displayed in the line vital statistics table. |
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Definition
(1) Local collisions. (2) Remote collisions. (3) Late collisions. (4) Bad FCS. (5) Runts. |
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Term
What can be done to eliminate collisions that are the result of too many nodes on the network? |
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Definition
| Additional bandwidth must be added or the network must be further subdivided. |
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Term
| Ideally, what should the average network utilization value be? |
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Definition
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Term
| Ideally, what should the maximum network untilization value be? |
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Definition
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Term
| What is a good indication that there are jabbers on the network? |
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Definition
| Jabbers manifest themselves as collisions, and high utilization and FCS error rates. |
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Term
| After running a PING test, what information is shown in the display window? |
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Definition
| The target node's network and MAC nodes addresses are displayed. The round-trip delay is indicated under the delay column in milliseconds. |
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Term
| Which protocol analyzer freature identifies errors that are associated with a specific node? |
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Definition
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Term
| What type of information does the MAC node statistics summary window show? |
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Definition
| A list of errored frames including frame length, time frame was transmitted, and source and destination addresses. |
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