A switch receives a frame on port ge-0/0/1 destined to a MAC address that is not in its forwarding table. The switch has ports ge-0/0/1 through ge-0/0/24, all in the same VLAN. Which ports will receive the frame?

Only ports that are not blocked by spanning tree

Only ports that have active devices

A switch receives a frame on port ge-0/0/3 with a source MAC address of 00:11:22:33:44:55. The MAC address table does not contain this address. What does the switch do with this information?

It updates the existing entry for 00:11:22:33:44:55 with a new port

It drops the frame because the source MAC address is unknown

It adds an entry mapping 00:11:22:33:44:55 to port ge-0/0/3

It floods the frame out all ports to learn the destination

A frame arrives at a switch port configured as an access port in VLAN 10. The frame is untagged. What does the switch do before forwarding the frame out another access port in VLAN 10?

It removes the existing tag and adds a new one

It drops the frame because it is untagged

It adds an 802.1Q tag with VLAN 10 to the frame

Why does a switch remove MAC address entries that have not been refreshed within the aging time?

To prevent stale entries from causing incorrect forwarding decisions

To free up memory for additional VLANs

To ensure that frames are always flooded to all ports

To reduce the processing load on the switch CPU

Juniper NetworksCertified Specialist, Enterprise Routing and Switching (JNCIS-ENT)

Domain 1Objective 2

Frame Processing JN0-352 Practice Questions (Page 4)

Part of the Layer 2 Switching and VLANs domain, which makes up ~15% of our current practice bank. Juniper Networks does not publish an official question count, but from its 90-minute exam (~35–60 total, ~5–9 in this domain), expect 1–1 from this objective — we provide 22 practice questions to prepare you well beyond it. (estimate)

22questions here

5free pages

7concepts

Questions 16–20

16application · medium
A switch receives a frame on port ge-0/0/1 destined to a MAC address that is not in its forwarding table. The switch has ports ge-0/0/1 through ge-0/0/24, all in the same VLAN. Which ports will receive the frame?
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17foundation · easy
A switch receives a frame on port ge-0/0/3 with a source MAC address of 00:11:22:33:44:55. The MAC address table does not contain this address. What does the switch do with this information?
Select an answer first
18application · medium
A network administrator notices that multicast video streams are being flooded to all ports in a VLAN, causing unnecessary load on hosts that are not interested in the video. What feature can be enabled to limit multicast flooding to only interested receivers?
Select an answer first
19foundation · easy
A frame arrives at a switch port configured as an access port in VLAN 10. The frame is untagged. What does the switch do before forwarding the frame out another access port in VLAN 10?
Select an answer first
20foundation · easy
Why does a switch remove MAC address entries that have not been refreshed within the aging time?
Select an answer first

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