A switch receives an untagged frame on a trunk port with a native VLAN of 5. The destination MAC address is known and associated with an access port in VLAN 5. How does the switch forward the frame?

It forwards the frame out the access port without adding a tag.

It drops the frame because the native VLAN is not allowed on access ports.

It adds a VLAN 5 tag and forwards the frame out the access port.

It floods the frame out all ports in VLAN 5 because the ingress was untagged.

A switch receives a frame on an access port in VLAN 10. The source MAC address is 00:11:22:33:44:55. The switch's MAC address table is full. What does the switch do with the frame?

It drops the frame because it cannot learn the source MAC address.

It replaces an existing entry with the new source MAC to make room.

It forwards the frame normally, but it cannot learn the source MAC address.

It floods the frame out all ports in VLAN 10 because the table is full.

A switch is experiencing high CPU utilization due to excessive flooding. The network administrator suspects that a device is sending frames with a rapidly changing source MAC address. How does this behavior affect the switch?

It causes the MAC address table to fill up with entries, forcing the switch to flood unknown unicast traffic.

It causes the switch to learn the same MAC on multiple ports, creating loops.

It causes the switch to drop all frames because the source MAC is invalid.

It causes the switch to broadcast all traffic to all ports.

During egress processing, what does a switch do before forwarding a frame out a port?

It learns the source MAC address from the frame.

It checks whether the egress port is a member of the frame's VLAN.

It removes the 802.1Q tag from all frames.

It performs a lookup of the destination MAC address in the MAC address table.

What information does a switch record in its MAC address table when it learns a new source MAC address?

The source MAC address, the ingress port, and the VLAN ID

The destination MAC address and the VLAN ID

The source IP address and the ingress port

The destination MAC address and the egress port

Juniper NetworksCertified Specialist, Service Provider Routing and Switching (JNCIS-SP)

Domain 5Objective 3

Frame Processing JN0-364 Practice Questions (Page 1)

Part of the Layer 2 Bridging and VLANs domain, which makes up ~11% of our current practice bank. Juniper Networks does not publish an official question count, but from its 90-minute exam (~35–60 total, ~4–7 in this domain), expect 1–1 from this objective — we provide 15 practice questions to prepare you well beyond it. (estimate)

15questions here

3free pages

5concepts

Questions 1–5

1application · medium
A switch receives an untagged frame on a trunk port with a native VLAN of 5. The destination MAC address is known and associated with an access port in VLAN 5. How does the switch forward the frame?
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2expert · hard
A switch receives a frame on an access port in VLAN 10. The source MAC address is 00:11:22:33:44:55. The switch's MAC address table is full. What does the switch do with the frame?
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3expert · hard
A switch is experiencing high CPU utilization due to excessive flooding. The network administrator suspects that a device is sending frames with a rapidly changing source MAC address. How does this behavior affect the switch?
Select an answer first
4foundation · easy
During egress processing, what does a switch do before forwarding a frame out a port?
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5foundation · easy
What information does a switch record in its MAC address table when it learns a new source MAC address?
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