Check the manuals for your particular software for exact details. Here is some general information which will help you configure your client to work at with MUN's DNS servers. Clients will need to be configured with a list of name servers to point to. Usually they will ask a preferred nameserver and one or more backup nameservers. These will usually referred to by their IP addresses rather than their domain names, for obvious reasons.
Some departments run their own nameservers.
Check with your departmental system administrators for the preferred setup at your location. Machines located outside St. John's would best be aimed at a closer machine for DNS service, if possible. Check with the nearest computing facility for information on local DNS service. Most clients provide the ability to append domain suffixes to failed queries, allowing users to abbreviate domain names. The mechanism for doing this varies considerably.