TCP/UDP Port Finder

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Database updated - March 30, 2016

Search results for "ud"

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Port: 50/UDP
50/UDP - Known port assignments (2 records found)
  • Service
    Details
    Source
  • re-mail-ck
    Remote Mail Checking Protocol
    IANA
  •  
    Remote Mail Checking Protocol (Official)
    WIKI
Port: 51/UDP
51/UDP - Known port assignments (2 records found)
  • Service
    Details
    Source
  • la-maint
    IMP Logical Address Maintenance
    IANA
  •  
    IMP Logical Address Maintenance (Official)
    WIKI
Port: 52/UDP
52/UDP - Known port assignments (2 records found)
  • Service
    Details
    Source
  • xns-time
    XNS Time Protocol
    IANA
  •  
    XNS (Xerox Network Systems) Time Protocol (Official)
    WIKI
Port: 53/UDP
53/UDP - Known port assignments (3 records found)
  • Service
    Details
    Source
  • domain
    Domain Name Server
    IANA
  •  
    Domain Name System (DNS) (Official)
    WIKI
  • domain
    Domain Name System (DNS). MacDNS, FaceTime
    Apple
Port: 54/UDP
54/UDP - Known port assignments (2 records found)
  • Service
    Details
    Source
  • xns-ch
    XNS Clearinghouse
    IANA
  •  
    XNS (Xerox Network Systems) Clearinghouse (Official)
    WIKI
Port: 55/UDP
55/UDP - Known port assignments (2 records found)
  • Service
    Details
    Source
  • isi-gl
    ISI Graphics Language
    IANA
  •  
    ISI Graphics Language (ISI-GL) (Official)
    WIKI
Port: 56/UDP
56/UDP - Known port assignments (3 records found)
  • Service
    Details
    Source
  • xns-auth
    XNS Authentication
    IANA
  •  
    Route Access Protocol (RAP) (Unofficial)
    WIKI
  •  
    XNS (Xerox Network Systems) Authentication (Official)
    WIKI
Port: 57/UDP
57/UDP - Known port assignments (3 records found)
  • Service
    Details
    Source
  •  
    any private terminal access
    IANA
  • priv-term
    any private terminal access
    SANS
  • fxscanner
    FX-Tools Vulnerability Scanner
    SANS
Port: 58/UDP
58/UDP - Known port assignments (2 records found)
  • Service
    Details
    Source
  • xns-mail
    XNS Mail
    IANA
  •  
    XNS (Xerox Network Systems) Mail (Official)
    WIKI
Port: 59/UDP
59/UDP - Known port assignments (2 records found)
  • Service
    Details
    Source
  •  
    any private file service
    IANA
  • priv-file
    any private file service
    SANS
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About TCP/UDP ports

TCP port 50 uses the Transmission Control Protocol. TCP is one of the main protocols in TCP/IP networks. TCP is a connection-oriented protocol, it requires handshaking to set up end-to-end communications. Only when a connection is set up user's data can be sent bi-directionally over the connection.
Attention! TCP guarantees delivery of data packets on port 50 in the same order in which they were sent. Guaranteed communication over TCP port 50 is the main difference between TCP and UDP. UDP port 50 would not have guaranteed communication as TCP.
UDP on port 50 provides an unreliable service and datagrams may arrive duplicated, out of order, or missing without notice. UDP on port 50 thinks that error checking and correction is not necessary or performed in the application, avoiding the overhead of such processing at the network interface level.
UDP (User Datagram Protocol) is a minimal message-oriented Transport Layer protocol (protocol is documented in IETF RFC 768).
Application examples that often use UDP: voice over IP (VoIP), streaming media and real-time multiplayer games. Many web applications use UDP, e.g. the Domain Name System (DNS), the Routing Information Protocol (RIP), the Dynamic Host Configuration Protocol (DHCP), the Simple Network Management Protocol (SNMP).
TCP vs UDP - TCP: reliable, ordered, heavyweight, streaming; UDP - unreliable, not ordered, lightweight, datagrams.
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