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Question 37 - JN0-280 discussion

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Which statement is correct about an IRB interface?

A.

An IRB interface switches traffic within the same VLAN.

Answers
A.

An IRB interface switches traffic within the same VLAN.

B.

An IRB interface trunks together VLANs on different switches.

Answers
B.

An IRB interface trunks together VLANs on different switches.

C.

An IRB interface is a physical Layer 3 interface that connects VLANs together.

Answers
C.

An IRB interface is a physical Layer 3 interface that connects VLANs together.

D.

An IRB interface is a Layer 3 interface that can be used to route between VLANs.

Answers
D.

An IRB interface is a Layer 3 interface that can be used to route between VLANs.

Suggested answer: D

Explanation:

An IRB (Integrated Routing and Bridging) interface provides routing functionality between VLANs at Layer 3, allowing devices in different VLANs to communicate with each other.

Step-by-Step Breakdown:

IRB Functionality:

The IRB interface enables routing between different VLANs by acting as a Layer 3 gateway. Traffic within the same VLAN is handled by Layer 2 switching, while traffic between VLANs is routed through the IRB interface.

Layer 3 Routing Between VLANs:

Each VLAN can be assigned an IP address on the IRB interface, which allows traffic to flow between VLANs based on Layer 3 IP routing.

Juniper

Reference:

IRB Interface Configuration: Juniper supports IRB for inter-VLAN routing on devices like the EX and QFX series switches, facilitating Layer 3 communication in data centers.

asked 10/10/2024
Sasha Grib
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