Why is an ARP cache not efficient when it is applied to a LAN?

The implementation of Address resolution protocol in a local area network uses a table called ARP cache to maintain...

a correlation between each MAC address and its corresponding IP address. Can you explain why every use of a fixed size of ARP cache is not efficient whenever it is applied to a LAN having a very large number of host clients machines and many transactions?

The ARP cache maintains a table of IP address to MAC address translations. The ARP cache should never get unmanageably large because ARP is only used to resolve MAC addresses on a local segment. Local segments on well-designed networks are created with a limited number of network hosts to prevent overabundant ARP and other broadcast traffic.

All remote communications are done through the gateway and only the gateway MAC is used to send requests to remote clients.

This was first published in June 2002

Dig Deeper



Find more PRO+ content and other member only offers, here.

Have a question for an expert?

Please add a title for your question

Get answers from a TechTarget expert on whatever's puzzling you.

You will be able to add details on the next page.



Forgot Password?

No problem! Submit your e-mail address below. We'll send you an email containing your password.

Your password has been sent to:









  • Virtual desktop security guide

    To secure virtual desktops, consider antivirus, certificates and network vulnerabilities. Just remember, VDI doesn't always ...

  • Guide to low-cost desktop virtualization

    In this guide, learn to virtualize desktops without spending more than you would when deploying PCs, and what VDI vendors are ...

  • VDI pilot project guide

    A VDI pilot project should start with a VDI project plan. Know what pitfalls to avoid and test product options to achieve a ...