Cisco
200-150 · Question #164
200-150 Question #164: Real Exam Question with Answer & Explanation
The correct answer is A: hub-to-switch. Without auto-MDIX, a crossover cable is required when connecting two devices of the same MDI type (both MDI or both MDI-X) because their transmit and receive pins would otherwise conflict.
Cisco Data Center Networking Technologies
Question
When the auto-MDIX is disabled, which two network configuration require a crossover cable? (Choose two)
Options
- Ahub-to-switch
- Bswitch-to-workstation
- Crouter-to-workstation
- Dhub-to-router
- ESwitch-to-router
Explanation
Without auto-MDIX, a crossover cable is required when connecting two devices of the same MDI type (both MDI or both MDI-X) because their transmit and receive pins would otherwise conflict.
Common mistakes.
- B. A switch is an MDI-X device and a workstation is an MDI device - they are unlike types, so their pins are already complementary and a standard straight-through cable provides the correct transmit-to-receive alignment.
- D. A hub (MDI-X) and a router (MDI) are unlike device types whose pins align naturally, requiring a straight-through cable - not a crossover - for proper communication.
- E. A switch (MDI-X) and a router (MDI) are unlike device types, so a straight-through cable correctly maps the switch's transmit pins to the router's receive pins without any crossover needed.
Concept tested. MDI vs MDI-X crossover cable selection
Reference. https://www.cisco.com/c/en/us/support/docs/lan-switching/ethernet/12006-46.html
Topics
#auto-MDIX#crossover cable#network cabling#Ethernet cable types
Community Discussion
No community discussion yet for this question.