A network administrator is troubleshooting a performance issue on a switch. The switch has a MAC address table that is nearly full, and the administrator suspects that unknown unicast flooding is occurring frequently. The network has many IoT devices that send traffic infrequently. Which combination of actions would most effectively reduce unknown unicast flooding while minimizing administrative overhead?

Disable MAC learning and rely on static entries for all devices.

Increase the MAC aging timer and configure static MAC entries for critical servers.

Decrease the MAC aging timer and enable port security on all ports.

Clear the MAC address table manually every hour.

A network administrator is designing a network for a high-security environment. They want to prevent unauthorized devices from connecting to the network by limiting which MAC addresses can access the switch ports. Which approach should they use?

Configure port security with sticky MAC addresses on each access port.

Configure static MAC address entries in the global MAC address table.

Disable MAC learning on all access ports.

Use a very short MAC aging timer to quickly remove unauthorized MACs.

How does a switch decide which port to use when forwarding a frame with a known destination MAC address?

It forwards the frame to the CPU to determine the correct port.

It forwards the frame out the port that has the lowest MAC address.

It forwards the frame out all ports except the receiving port.

It uses the destination MAC address to look up the MAC address table and forwards the frame only out the associated port.

A network administrator is troubleshooting intermittent connectivity for a user who moves between two offices. The user's laptop is connected to port Gi0/1 in the morning and port Gi0/2 in the afternoon. What should the administrator expect the switch to do when the laptop sends its first frame from Gi0/2?

Update the MAC address table to associate the laptop's MAC with Gi0/2.

Drop frames from the laptop because the MAC is already known on another port.

Flood all frames from the laptop out all ports until the MAC is relearned.

Keep the laptop's MAC associated with Gi0/1 until the aging timer expires.

Why does a switch remove MAC address entries from its MAC address table after a period of inactivity?

To prevent MAC address spoofing attacks

To keep the table current and avoid forwarding frames to ports where devices are no longer present

To reduce the number of broadcast frames on the network

To free up memory for the routing table

CiscoCertified Network Associate (CCNA)

Domain 1Objective 13

1.13 Describe Switching Concepts 200-301 Practice Questions (Page 1)

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 1–5

1expert · hard
A network administrator is troubleshooting a performance issue on a switch. The switch has a MAC address table that is nearly full, and the administrator suspects that unknown unicast flooding is occurring frequently. The network has many IoT devices that send traffic infrequently. Which combination of actions would most effectively reduce unknown unicast flooding while minimizing administrative overhead?
Select an answer first
2expert · medium
A network administrator is designing a network for a high-security environment. They want to prevent unauthorized devices from connecting to the network by limiting which MAC addresses can access the switch ports. Which approach should they use?
Select an answer first
3foundation · easy
How does a switch decide which port to use when forwarding a frame with a known destination MAC address?
Select an answer first
4application · medium
A network administrator is troubleshooting intermittent connectivity for a user who moves between two offices. The user's laptop is connected to port Gi0/1 in the morning and port Gi0/2 in the afternoon. What should the administrator expect the switch to do when the laptop sends its first frame from Gi0/2?
Select an answer first
5foundation · easy
Why does a switch remove MAC address entries from its MAC address table after a period of inactivity?
Select an answer first

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1.13 Describe Switching Concepts 200-301 Practice Questions (Page 1)

Questions 1–5

A network administrator is designing a network for a high-security environment. They want to prevent unauthorized devices from connecting to the network by limiting which MAC addresses can access the switch ports. Which approach should they use?

How does a switch decide which port to use when forwarding a frame with a known destination MAC address?

Why does a switch remove MAC address entries from its MAC address table after a period of inactivity?

Keep studying — Network Fundamentals