200-901 Question 177
Select 2A network engineer is configuring a switch for a new department in the company. The department requires its traffic to be isolated from other departments while still using the same physical network infrastructure. Additionally, the network engineer needs to ensure that devices within this department can communicate with each other using their unique identifiers. Which combination of technologies should the engineer configure to achieve this?
- A
Assign a VLAN to the department's devices
- B
Configure MAC addresses for the devices in the department
- C
Configure inter-VLAN routing for the department's devices
- D
Enable port mirroring for all department switch ports
- E
Use VLAN tagging to separate the department's traffic on shared links
Show answer and explanation
Correct answers: A, E
Explanation
To isolate the department's traffic while using the same physical network infrastructure, VLANs are used to logically group devices and separate their traffic. VLAN tagging ensures that traffic remains segregated when traversing shared network links. MAC addresses are essential for device communication within the VLAN, but they do not provide traffic isolation on their own.
- A. Correct.
Correct: Assigning a VLAN ensures that the department's traffic is logically isolated from other departments, even while sharing the same physical infrastructure.
- B. Incorrect.
Incorrect: MAC addresses are unique identifiers for network devices, but they are not used to isolate traffic or group devices into logical networks.
- C. Incorrect.
Incorrect: Inter-VLAN routing is used to enable communication between VLANs, but this scenario requires traffic isolation, not intercommunication.
- D. Incorrect.
Incorrect: Port mirroring is used for network monitoring and debugging, not for traffic isolation or logical grouping.
- E. Correct.
Correct: VLAN tagging (e.g., 802.1Q) allows traffic from different VLANs to coexist on shared network links by tagging packets to indicate their VLAN membership.