Integrated Routing and Bridging (IRB) JN0-281 Practice Questions (Page 2)

Questions 6–10

1. 6foundation · easy

   What is the role of the IRB interface in the forwarding of traffic between two hosts in the same VLAN?

   • AThe IRB interface routes the traffic between the hosts.
   • BThe IRB interface translates the frames to a different VLAN.
   • CThe IRB interface is not involved; the switch bridges the frames at Layer 2.
   • DThe IRB interface filters the traffic based on security policies.
   Reveal Solution Discussion Select an answer first
2. 7foundation · easy

   In a data center switch, which statement best describes the role of an IRB interface in relation to a VLAN?

   • AIt filters traffic between hosts in the same VLAN based on security policies.
   • BIt provides a Layer 2 path for frames within the same VLAN.
   • CIt serves as the Layer 3 gateway for that VLAN, enabling routing to other VLANs.
   • DIt replaces the need for VLANs by providing direct routing between physical ports.
   Reveal Solution Discussion Select an answer first
4. 8application · medium

   You are configuring IRB on a Juniper EX3400. You have created VLAN 10 and assigned it to ge-0/0/1. You then configure 'set interfaces irb unit 10 family inet address 192.168.10.1/24' and 'set vlans v10 l3-interface irb.10'. However, the IRB interface is still down. What is the most likely cause?

   • AThe IRB unit number must be 0.
   • BThe IRB interface is not bound to the VLAN.
   • CThe IP address is in the wrong subnet.
   • DThe VLAN does not have any active ports.
   Reveal Solution Discussion Select an answer first
5. 9foundation · easy

   Hosts in VLAN 100 cannot ping the IRB interface address. Which command would you use to verify that the IRB interface is operationally up?

   • Ashow arp
   • Bshow interfaces terse
   • Cshow vlans
   • Dshow route
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6. 10foundation · easy

   What is the purpose of the 'l3-interface' statement in a VLAN configuration?

   • AIt defines the VLAN ID for the VLAN.
   • BIt assigns a Layer 2 interface to the VLAN.
   • CIt enables routing protocols on the VLAN.
   • DIt binds the VLAN to an IRB interface for Layer 3 routing.
   Reveal Solution Discussion Select an answer first