y is added and an ARP request is sent for the given address. The packet is queued on this entry.</p>
<p>If the IP address was already pending in the cache, a new ARP request is sent for the given address. The packet is queued on this entry.</p>
<p>If the IP address was already stable in the cache, and a packet is given, it is directly sent and no ARP request is sent out.</p>
<p>If the IP address was already stable in the cache, and no packet is given, an ARP request is sent out.</p>
<dl class="params"><dt>P