* kubernetes will try to acquire the iptables lock every 100 msec during 5 seconds instead of every second. This specially useful for environments using kube-proxy in iptables mode with a high churn rate of services. ([#85771](https://github.com/kubernetes/kubernetes/pull/85771), [@aojea](https://github.com/aojea))

// https://www.iana.org/domains/root/db/dubai.html
dubai

// dunlop : The Goodyear Tire & Rubber Company
// https://www.iana.org/domains/root/db/dunlop.html
dunlop

// dupont : DuPont Specialty Products USA, LLC
// https://www.iana.org/domains/root/db/dupont.html
dupont

// durban : ZA Central Registry NPC trading as ZA Central Registry
// https://www.iana.org/domains/root/db/durban.html
durban

In an expression switch, the cases contain expressions that are compared
against the value of the switch expression.
In a type switch, the cases contain types that are compared against the
type of a specially annotated switch expression.
The switch expression is evaluated exactly once in a switch statement.
</p>

<h4 id="Expression_switches">Expression switches</h4>

<p>
In an expression switch,