> I have a Windows service application. That needs to check if several hosts
(IP numbers, 
> no need to DNS resolve) are still alive. Assuming easiest way to ping
them. Since that will
> require no installation on my clients at all. Please suggest other ways
that you think apply.

Ping messages (ICMP) are frequently blocked for servers.
If you have control over the hosts, you can be sure to enable it.

But ping doesn't mean the services are running, it only means that the
server OS is running.
The best way to check for an alive host is to try a connection to the host,
connection to the application that you must verify.

The author of the freeware multi-tier middleware MidWare
The author of the freeware Internet Component Suite (ICS)

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