An administrator has two switches connected by two 1 Gbps links. The links are configured as a LAG. One of the physical links fails. What happens to traffic?

The switch automatically replaces the failed link with a new physical link.

All traffic stops because the LAG is broken.

Traffic continues at 2 Gbps because the LAG maintains its bandwidth.

Traffic continues to flow over the remaining link, but the aggregate bandwidth is reduced to 1 Gbps.

Which protocol is commonly used to automatically negotiate and manage link aggregation between switches?

LLDP (Link Layer Discovery Protocol)

LACP (Link Aggregation Control Protocol)

OSPF (Open Shortest Path First)

What does an Ethernet switch do when it receives a frame with an unknown destination MAC address?

It floods the frame out all ports except the port on which it was received

It forwards the frame only to the default gateway

It sends the frame back to the source port

A switch receives a frame on port ge-0/0/1 with destination MAC 00:1c:73:aa:bb:cc. The MAC address table does not contain this MAC. What action does the switch take?

Flood the frame out of all ports except the ingress port.

Drop the frame because the destination is unknown.

Forward the frame only out of the ingress port.

Send an ARP request to discover the destination MAC.

Juniper NetworksCertified Associate, Junos

Domain 1Objective 3

Ethernet Networking JN0-105 Practice Questions (Page 1)

Part of the Networking Fundamentals domain, which makes up ~24% of our current practice bank. Juniper Networks does not publish an official question count, but from its 90-minute exam (~35–60 total, ~8–14 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

6concepts

Questions 1–5

1expert · hard
An administrator has two switches connected by two 1 Gbps links. The links are configured as a LAG. One of the physical links fails. What happens to traffic?
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2foundation · easy
Which protocol is commonly used to automatically negotiate and manage link aggregation between switches?
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3foundation · easy
What does an Ethernet switch do when it receives a frame with an unknown destination MAC address?
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4application · medium
A switch receives a frame on port ge-0/0/1 with destination MAC 00:1c:73:aa:bb:cc. The MAC address table does not contain this MAC. What action does the switch take?
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5foundation · easy
Which MAC address is used to send a frame to all devices on the same local network segment?
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