Which tcp/udp port does the dns service use to communicate?

A911 dispatcher is the sole sender of messages to all police officers. while on patrol, officers communicate with the dispatcher who, in turn, relays messages to other officers. the officers do not communicate directly with one another. this illustrates a network.

Awell-diversified portfolio needs about 20-25 stocks from different categories is this true or false?

Who is the first president to use social media as part of his campaign strategy