Final answer:
A DNS client adds a suffix, such as a domain name, before passing an address to a DNS Server.
Step-by-step explanation:
True. A DNS client does add a suffix before passing an address to a DNS Server. This suffix is called a domain name. When a client enters a website address in their web browser, the DNS client appends a domain name suffix, such as '.com' or '.org', to the address before sending it to the DNS Server. This is done so that the DNS Server can properly resolve the IP address associated with the domain name.