Multiple choice network basics2

Your client has a 10Base2 Ehternet network which is using 160m of RG-58A/U cable and two 50 ohm terminators that are both grounded.What is wrong with his network?

  1. The terminators should be 93 ohms

  2. He should be using RG-59/U cable

  3. Only one terminator should be grounded

  4. Impedence mismatch
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

In a properly configured 10Base2 (Thinnet Ethernet) network using RG-58A/U coaxial cable with 50-ohm terminators, only ONE terminator should be grounded - typically at the hub or central point. Grounding both terminators creates ground loops, which cause signal interference, noise, and potential network failures. The terminators are correctly 50 ohms (not 93), RG-58A/U is the right cable for 10Base2, and impedance mismatch would occur with wrong cable types.

AI explanation

To answer this question, we need to understand the basics of 10Base2 Ethernet networks and the requirements for proper network setup.

A 10Base2 Ethernet network, also known as Thinnet, uses RG-58A/U coaxial cable with a characteristic impedance of 50 ohms. The cable is terminated at both ends with a 50 ohm terminator. The terminators are used to absorb and dissipate any signal reflections that occur at the ends of the cable, ensuring proper signal transmission.

In the given scenario, the client's network is using 160m of RG-58A/U cable and two 50 ohm terminators that are both grounded.

Option A) The terminators should be 93 ohms - This option is incorrect. The terminators used in a 10Base2 network should be 50 ohms, not 93 ohms.

Option B) He should be using RG-59/U cable - This option is incorrect. RG-58A/U cable is the correct cable type for a 10Base2 network, not RG-59/U cable.

Option C) Only one terminator should be grounded - This option is correct. In a 10Base2 network, only one terminator should be grounded. Grounding both terminators can cause signal reflections and disrupt network communication.

Option D) Impedance mismatch - This option is incorrect. The impedance of the cable and the terminators should match. In this case, the impedance is correctly set to 50 ohms.

Therefore, the correct answer is C) Only one terminator should be grounded. This option is correct because grounding both terminators can cause signal reflections and disrupt network communication.

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