Question

There are three connections listed in your port scanner. Of these, which uses UDP Ports?

a) HTTP
b) FTP
c) Telnet
d) DNS

Answer 1

DNS uses UDP Ports, specifically UDP port 53, for resolving hostnames to IP addresses. HTTP, FTP, and Telnet, by contrast, all use TCP ports for communication. so, option d is the correct answer.

Step-by-step explanation:

Of the connections listed in your port scanner, DNS uses UDP Ports for its queries. HTTP, or Hypertext Transfer Protocol, primarily uses TCP port 80 to serve web pages. FTP, File Transfer Protocol, uses TCP ports 20 and 21 for data transfer and control messages, respectively. Telnet, a protocol for remote communication, uses TCP port 23. Meanwhile, DNS, which stands for Domain Name System, often uses UDP port 53 to resolve hostnames to IP addresses for efficient communication over the Internet without requiring a connection before sending data packets.

Among the given options for the connections in the port scanner, the UDP (User Datagram Protocol) ports are used by DNS (Domain Name System).

HTTP (Hypertext Transfer Protocol), FTP (File Transfer Protocol), and Telnet all use TCP (Transmission Control Protocol) instead of UDP.