FUNDAMENTALS OF COMPUTER

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TROUBLESHOOTING COMPUTER ISSUES

IDENTIFYING HARDWARE SOFTWARE NETWORK PROBLEMS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Alice has recently installed some new computers onto her Gigabit Ethernet network. To ensure the best possible network performance, she has configured the network adapters in the new computers to run at 1 Gbps speed and use full-duplex communication. Once the computers are in service, however, Alice begins getting reports of extremely poor network performance on those machines. She tries running some ping tests and does not see any problem. She calls in a consultant to perform a packet analysis, and the consultant detects large numbers of packet collisions, late collisions, Cyclic Redundancy Check (CRC) errors, and runt frames. Which of the following could conceivably be the problem?
A
Duplex mismatch
B
TX/RX reversal
C
Incorrect cable type
D
Damaged cables
Explanation: 

Detailed explanation-1: -Auto-negotiation, or negotiation speed, refers to a signalling mechanism that allows ethernet interfaces of two connected devices to determine the optimal speed and duplex mode of the connection. For instance, wired routers make use of these interfaces to communicate with devices on their local network.

Detailed explanation-2: -1000BASE-T maximum cable length is 100 meters (m), or about 330 feet. It uses the RJ45 connector and jack. 1000BASE-T operates at 1, 000 Mbps, or 1 gigabit per second (Gbps).

Detailed explanation-3: -Gigabit Ethernet networks can function as half-duplex networks for shared media or as Ethernet switches with a switched full-duplex network. Gigabit Ethernet uses the same 802.3 framing structure as standard Ethernet.

Detailed explanation-4: -Full-duplex Ethernet does save time when compared to half-duplex because it alleviates collisions and frame retransmissions. Sending and receiving are separate functions, creating a system where there is full data capacity in each direction. In contrast, half-duplex can be used to conserve bandwidth.

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