What happened when you tried using these tools with various domain names and IP addresses as suggested below?

DIG: This tool gives you information about DNS (domain name) records. The simplest use of dig is to look up the IP address for a given domain name or vice versa. It can also give you much more information, such as the "start of authority" (soa) or "mail exchanger" (mx) for the domain See "man dig" for more information. Examples: dig www.google.com dig -x 136.168.201.112 dig soa www.cs.csub.edu PING: This tool sends a query to the destination server to see if it is still responding to packets. A response to ping means the destination is online. Ping will tell you how long it took for the packets to travel if there is a response. If there is no response, the server may be offline or just blocking ping requests. See "man ping" for more information. Usage ping error messages. See "man tracepath" for more information. Usage TELNET: This tool connect destination host.port via a telnet protocol; if connection establishes means connectivity between two hosts is working fine. You can use port 443 or 80 for testing purposes. See "man telnet" for more information. Usage