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200-301 · Question #699

What interconnection cable can you use when you use a MDI connection?

The correct answer is C. crossover. When connecting two MDI (Medium Dependent Interface) devices directly, a crossover cable is required to allow communication.

Submitted by rania.sa· Mar 5, 2026

Question

What interconnection cable can you use when you use a MDI connection?

Options

  • Acut-through
  • Bstraight-through
  • Ccrossover
  • Drollover

How the community answered

(42 responses)
  • A
    7% (3)
  • B
    2% (1)
  • C
    88% (37)
  • D
    2% (1)

Why each option

When connecting two MDI (Medium Dependent Interface) devices directly, a crossover cable is required to allow communication.

Acut-through

Cut-through refers to a forwarding method in switches, not a type of cable.

Bstraight-through

A straight-through cable is used for connecting an MDI device to an MDI-X (Medium Dependent Interface Crossover) device, where one device transmits on 1/2 and receives on 3/6, and the other does the opposite.

CcrossoverCorrect

An MDI connection refers to a port configured to transmit on pins 1/2 and receive on pins 3/6. When connecting two MDI ports (e.g., PC to PC or switch to switch without Auto-MDIX), a crossover cable is necessary to 'cross' the transmit and receive pairs, ensuring that the transmit pair of one device connects to the receive pair of the other and vice versa.

Drollover

A rollover cable (console cable) is used to connect a computer's serial port to a router or switch's console port for management, not for network data interconnection.

Concept tested: Ethernet cable types and MDI/MDI-X connections

Source: https://www.cisco.com/c/en/us/support/docs/smb/switches/cisco-small-business-200-series-smart-switches/smb4061-use-auto-mdix-feature-on-switches-of-cisco-smb-200-300.html

Topics

#Ethernet cabling#Crossover cable#MDI

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