TCP/UDP Port Finder

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Database updated - March 30, 2016

Search results for "3999"

Port: 3999/TCP
3999/TCP - Known port assignments (3 records found)
  • Service
    Details
    Source
  • nvcnet
    Norman distributes scanning service
    IANA
  •  
    Norman distributed scanning service (Unofficial)
    WIKI
  • trojan
    [trojan] Remote Anything. Remote Access. Works on Windows 95, 98, ME, NT, 2000 and XP. This is a commercial software and sold for 49$ for one licens! Aliases: RA, Backdoor.RA, Remote-Anything
    Simovits
Port: 3999/UDP
3999/UDP - Known port assignments (2 records found)
  • Service
    Details
    Source
  • nvcnet
    Norman distributes scanning service
    IANA
  •  
    Norman distributed scanning service (Unofficial)
    WIKI

About TCP/UDP ports

TCP port 3999 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 3999 in the same order in which they were sent. Guaranteed communication over TCP port 3999 is the main difference between TCP and UDP. UDP port 3999 would not have guaranteed communication as TCP.

UDP on port 3999 provides an unreliable service and datagrams may arrive duplicated, out of order, or missing without notice. UDP on port 3999 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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