A switch has just been powered on and its MAC address table is empty. A workstation on port Gi0/1 sends a frame to a server on port Gi0/2. After the switch forwards this frame, which entries will be present in the MAC address table?

Both the workstation's and server's MAC addresses mapped to their respective ports.

No entries because the switch only learns MAC addresses from broadcast frames.

The server's MAC address mapped to Gi0/2 only.

The workstation's MAC address mapped to Gi0/1 only.

A switch receives a frame on port Gi0/3 with source MAC 00:AA:BB:CC:DD:EE. The MAC address table already has an entry for 00:AA:BB:CC:DD:EE on port Gi0/7. What will the switch do?

Keep the existing entry on Gi0/7 and ignore the new source.

Update the MAC table to associate 00:AA:BB:CC:DD:EE with Gi0/3.

Drop the frame because the source MAC is already known.

Flood the frame out all ports except Gi0/3.

A network administrator is troubleshooting intermittent connectivity issues. The switch's MAC address table shows multiple entries for the same MAC address on different ports. Which of the following is the most likely cause?

The MAC aging timer is set too low, causing entries to be relearned frequently.

The workstation has multiple network interfaces with the same MAC address.

The switch is configured with multiple VLANs and the MAC is present in each VLAN.

A Layer 2 loop is causing the switch to learn the same MAC on multiple ports.

A switch's MAC address table shows an entry for a laptop that was connected to port Gi0/5. The laptop has been shut down and disconnected for several hours. What will the switch do with that MAC address entry?

Remove the entry immediately when the link on the port goes down.

Keep the entry and continue forwarding frames to that port for the laptop.

Remove the entry after the aging timer expires because no frames from that MAC have been received.

Keep the entry indefinitely until the port is administratively shut down.

A network administrator is troubleshooting a problem where a switch is flooding frames to a device that is actively communicating. The device's MAC address is present in the table, but the entry is frequently updated with a different port. What is the most likely cause?

The switch's MAC address table is full, so it cannot store the entry reliably.

A Layer 2 loop is causing the switch to see the device's frames on multiple ports.

The device is using a different MAC address for each communication session.

The MAC aging timer is set too high, causing entries to remain stale.

CiscoCertified Network Associate (CCNA)

Domain 1Objective 13

1.13 Describe Switching Concepts 200-301 Practice Questions (Page 4)

Part of the Network Fundamentals domain, which accounts for 20% of the 200-301 exam. Cisco does not publish an official question count, but from its 120-minute exam (~50–80 total, ~10–16 in this domain), expect 1–1 from this objective — we provide 32 practice questions to prepare you well beyond it. (estimate)

32questions here

7free pages

5concepts

20%of the exam

Questions 16–20

16application · easy
A switch has just been powered on and its MAC address table is empty. A workstation on port Gi0/1 sends a frame to a server on port Gi0/2. After the switch forwards this frame, which entries will be present in the MAC address table?
Select an answer first
17application · medium
A switch receives a frame on port Gi0/3 with source MAC 00:AA:BB:CC:DD:EE. The MAC address table already has an entry for 00:AA:BB:CC:DD:EE on port Gi0/7. What will the switch do?
Select an answer first
18expert · hard
A network administrator is troubleshooting intermittent connectivity issues. The switch's MAC address table shows multiple entries for the same MAC address on different ports. Which of the following is the most likely cause?
Select an answer first
19application · medium
A switch's MAC address table shows an entry for a laptop that was connected to port Gi0/5. The laptop has been shut down and disconnected for several hours. What will the switch do with that MAC address entry?
Select an answer first
20expert · hard
A network administrator is troubleshooting a problem where a switch is flooding frames to a device that is actively communicating. The device's MAC address is present in the table, but the entry is frequently updated with a different port. What is the most likely cause?
Select an answer first

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