Cisco Certified Network Associate (CCNA) 200-301 Exam Question & Answer: Switching feature removes unused MAC address

Cisco Certified Network Associate (CCNA) 200-301 certification exam practice question and answer (Q&A) dump with detail explanation and reference available free, helpful to pass the Cisco Certified Network Associate (CCNA) 200-301 exam and earn Cisco Certified Network Associate (CCNA) 200-301 certification.

Question

Exam Question

Which switching feature removes unused MAC addresses from the MAC address table, which allows new MAC addresses to be added?

A. MAC address aging
B. MAC move
C. MAC address auto purge
D. dynamic MAC address learning

Correct Answer

A. MAC address aging

Explanation 1

The switching feature that removes unused MAC addresses from the MAC address table, which allows new MAC addresses to be added is called MAC address aging. This feature removes unused MAC addresses from the MAC address table after a certain period of inactivity. This frees up space in the MAC address table, allowing new MAC addresses to be added when new devices are connected to the network. The aging time determines how long a MAC address can remain in the table before it is removed.

Explanation 2

The correct answer is A, MAC address aging.

MAC address aging is a feature of switches that removes unused MAC addresses from the MAC address table, which allows new MAC addresses to be added. This is done by setting a timer for each MAC address entry in the table. When the timer expires, the entry is removed from the table. This helps to keep the MAC address table up-to-date and prevents it from becoming too large.

The other options are not correct. MAC move is a feature that allows you to move MAC addresses from one port to another. MAC address auto purge is a feature that automatically removes MAC addresses from the MAC address table when they are no longer in use. Dynamic MAC address learning is a feature that allows switches to learn MAC addresses dynamically.

Explanation 3

The switching feature that removes unused MAC addresses from the MAC address table, which allows new MAC addresses to be added is called MAC address aging. It is a switching feature that removes unused MAC addresses from the MAC address table after a certain period of inactivity. This frees up space in the MAC address table, allowing new MAC addresses to be added when new devices are connected to the network. The aging time determines how long a MAC address can remain in the table before it is removed.

Explanation 4

The correct answer is A. MAC address aging.

MAC address aging is a feature that removes unused MAC addresses from the MAC address table, which allows new MAC addresses to be added. This is done by setting a timer for each MAC address entry in the table. When the timer expires, the entry is removed from the table. This ensures that the MAC address table does not become too large and that it contains only the MAC addresses of devices that are currently connected to the switch.

B. MAC move is a feature that allows you to move a MAC address from one port to another. This can be useful if you need to change the port that a device is connected to.

C. MAC address auto purge is a feature that automatically removes MAC addresses from the MAC address table when they are no longer in use. This can be useful if you want to ensure that the MAC address table does not become too large.

D. Dynamic MAC address learning is a feature that allows the switch to learn the MAC addresses of devices that are connected to it. This is done by listening to the traffic that is sent to the switch. When the switch sees a packet that is addressed to a MAC address that is not in the MAC address table, it adds the MAC address to the table.

Explanation 5

According to the web search results, the switching feature that removes unused MAC addresses from the MAC address table is A. MAC address aging. MAC address aging is a process that deletes dynamic MAC address entries from the MAC address table after a specified period of time (usually 300 seconds) if no frames are received from that MAC address. This process helps to keep the MAC address table updated and prevent it from being filled with stale entries that are no longer in use. MAC address aging also allows new MAC addresses to be added to the MAC address table when new devices connect to the network.

Option B is incorrect because MAC move is a feature that detects when a MAC address moves from one port to another and updates the MAC address table accordingly. Option C is incorrect because MAC address auto purge is a feature that deletes all dynamic MAC address entries from the MAC address table when a switch reloads or reboots. Option D is incorrect because dynamic MAC address learning is a feature that adds MAC address entries to the MAC address table when a switch receives frames from new devices.

Explanation 6

The correct answer is A. MAC address aging.

MAC address aging is a feature that removes unused MAC addresses from the MAC address table, which allows new MAC addresses to be added. This is done by setting a timer for each MAC address entry in the table. When the timer expires, the MAC address is removed from the table. This helps to keep the MAC address table up-to-date and prevents it from becoming too large.

B. MAC move is a feature that allows you to move a MAC address from one port to another. This is useful if you need to change the physical location of a device on your network.

C. MAC address auto purge is a feature that automatically removes MAC addresses from the MAC address table when they are no longer in use. This is similar to MAC address aging, but it is done automatically.

D. dynamic MAC address learning is a feature that allows a switch to learn the MAC addresses of devices on the network. This is done by listening to traffic on the network and recording the MAC addresses of the devices that are sending and receiving traffic.

Explanation 7

The switching feature that removes unused MAC addresses from the MAC address table, allowing new MAC addresses to be added, is:

A. MAC address aging

MAC address aging is a feature commonly found in Ethernet switches. It is used to remove inactive or unused MAC addresses from the MAC address table after a certain period of time. By default, the MAC address table has a limited capacity, and if it becomes full, the switch may not be able to learn new MAC addresses. MAC address aging solves this problem by periodically checking the activity status of MAC addresses and removing those that have not been seen or used within a specific timeframe. This frees up space in the MAC address table, allowing new MAC addresses to be learned and added.

Option B, MAC move, refers to the process of a device with a specific MAC address moving from one port to another within a network. It does not specifically relate to removing unused MAC addresses.

Option C, MAC address auto purge, is not a standard term or feature in switching. It does not accurately describe the process of removing unused MAC addresses.

Option D, dynamic MAC address learning, is the process by which a switch learns MAC addresses by examining the source MAC addresses of incoming frames. It does not specifically address the removal of unused MAC addresses.

Therefore, the correct answer is A. MAC address aging.

Explanation 8

One of the features of switching is to remove unused MAC addresses from the MAC address table, which allows new MAC addresses to be added when new devices are connected to the network. This feature is called MAC address aging. MAC address aging is based on an aging time, which determines how long a MAC address can remain in the MAC address table without being updated. The default aging time is 300 seconds, but it can be configured to a different value or disabled altogether. MAC address aging helps to prevent the MAC address table from becoming full and prevents stale entries from causing incorrect forwarding decisions.