Exam N10-008 topic 1 question 459 discussion

As no cross-over cable is being used, auto-MDIX needs to be enabled. No information on redundant routes has been provided to suggest that STP should be active.

i think the question states "check after successfully testing the cable that was wired for TIA/EIA-568A on both ends". Therefore, applying MDI-X will not be helpful, which left the STP option to prevent loop. I will go with D.

The network administrator should check if MDIX is enabled on the new switch (Option A)12. MDIX (Medium Dependent Interface Crossover) is a technology used in switches and network interface cards (NICs) that allows them to automatically detect whether a straight-through or crossover cable is needed and configures the network connection appropriately12. If MDIX is not enabled on the new switch, it may not be able to establish a connection with the other switch12. The administrator should also check if STP (Spanning Tree Protocol) is disabled on the switches (Option D)13. STP is a network protocol designed to prevent loops in a network topology3. If STP is disabled, it could lead to switching loops, which can cause a variety of network issues, including a lack of connectivity3.

D isnt wrong it just dont make sence for this question, if it ask you to what to check after testing a cable

Did you notice how they put "redundancy" in that to add the mystery of whether it is because of a broadcast storm that there is no connectivity. I will go for MDI-X. But in practice, nowadays, who will look at it. It is always assumed, right?

D. STP needs to be enabled on the switches. Since it's a redundant network, STP will prevent loops. The new switch installed most likely is configured wrong.

If MDIX is not enabled, the cable used must be either B-B or A-B

. If MDIX is enabled on the new switch. When replacing a switch, it is important to ensure that the new switch has the same configuration as the old one. One common issue that can arise when replacing a switch is that the new switch may not have MDIX (Media Dependent Interface Crossover) enabled by default. MDIX is a technology that allows switches to automatically detect the type of cable being used and adjust the transmission accordingly. If one end of the cable is wired for TIA/EIA-568A and the other end is wired for TIA/EIA-568B, MDIX can help ensure that the switch can still establish a connection. PoE (Power over Ethernet) is unlikely to be the cause of the problem, as it is a feature that allows devices to receive power over the Ethernet cable, and does not affect the transmission of data. Plenum cables are used in areas where fire safety is a concern, such as air handling spaces, but they do not affect the transmission of data. STP (Spanning Tree Protocol) is a protocol used to prevent loops in a network, but it is unlikely to be the cause of the problem if the cable has already been successfully tested on both ends.

If the cable has TIA/EIA-568A on both ends... wouldn't you need to make sure that MDIX was enabled? Or use a crossover cable?