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A single port can be configured to listen for UDP or TCP inbound connection requests (or both). Telnet uses TCP. So when you telnet to a specific IP:port, telnet will attempt to make a TCP connection. If there is no TCP listener on the port you specify, then the connection request will be refused. It matters not if you have a UDP listener on the port. Telnet will not be able to establish a connection to a UDP port.
What else can I help you with?
Does Telnet use UDP?
No, it uses TCP. See related link
What is the tftp port number?
Port 69 and UDP are used for tftp transmissions.
Example of application used by the UDP and TCP?
UDP: DNS, TFTP, DHCP... TCP: SMTP, HTTP, HTTPS, DNS, FTP, SHH, Telnet...
What are the specific port no of tcp and udp?
Port No. for Tranmission Control Protocal (TCP) is 6 Port No. for User Datagram Protocol (UDP) is 17
What is ntp port number?
UDP port 123. (UDP is a connectionless protocol that sacrifices reliability for speed and bandwidth).
What is the difference between a DNS port and UDP?
There are a lot of differences between a DNS port and UDP. An example would be DNS is for translation while UDP actually relays the host communication.
What TCPIP model layer does DHCP work at?
DHCP is a layer-4 protocol, most commonly transported over UDP. UDP port number 67 is the destination port of a server, and UDP port number 68 is used by the client
What port does icmp belong to?
ICMP does not have a port like TCP and UDP.
What is port 1151 used for?
Port 1151 is used for TCP/UDP
What layer 4 protocol does RIP use?
RIP uses UDP protocol with port number 520
What is port number tftp?
Port 69 and UDP are used for tftp transmissions.
What is the port number RIP uses?
Udp - 520.
