200-901 Question 176
Select 3A network administrator is configuring a switch that will handle multiple departments, each requiring its own isolated network segment. They also want to ensure that devices within these segments can communicate efficiently. Which combination of technologies should the administrator use to achieve this?
- A
Use VLANs to logically segment the network based on departments
- B
Assign unique MAC addresses to each department to isolate traffic
- C
Enable VLAN tagging on switch ports to associate traffic with the correct VLAN
- D
Use the same MAC address for multiple devices within a VLAN to reduce overhead
- E
Implement VLANs and configure inter-VLAN routing for communication between VLANs
Show answer and explanation
Correct answers: A, C, E
Explanation
To isolate different departments on a network, VLANs are used to logically segment traffic. VLAN tagging ensures traffic is routed to its appropriate VLAN, and inter-VLAN routing allows communication between VLANs if needed. MAC addresses, on the other hand, uniquely identify devices and are not used to segment networks or group devices by departments.
- A. Correct.
Correct: VLANs (Virtual Local Area Networks) allow logical segmentation of a network, separating traffic for different departments or groups.
- B. Incorrect.
Incorrect: MAC addresses are unique to individual devices and cannot be assigned to departments. They are not used to isolate traffic but to identify devices on a network.
- C. Correct.
Correct: VLAN tagging (e.g., IEEE 802.1Q) ensures that traffic is correctly identified and associated with the appropriate VLAN.
- D. Incorrect.
Incorrect: Using the same MAC address for multiple devices violates the principle of uniqueness in MAC addressing and causes network issues.
- E. Correct.
Correct: VLANs provide isolation, but inter-VLAN routing is necessary if devices in different VLANs need to communicate.