TCP/UDP Port Finder

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Database updated - March 30, 2016

Search results for "138"

Port: 138/TCP
138/TCP - Known port assignments (5 records found)
  • Service
    Details
    Source
  • netbios-dgm
    NETBIOS Datagram Service
    IANA
  •  
    NetBIOS NetBIOS Datagram Service (Official)
    WIKI
  • threat
    [threat] Chode
    Bekkoame
  • trojan
    [trojan] Chode. Worm / Network trojan / Autodialing trojan / Destructive trojan. Works on Windows 3.x, 95 and 98 (maybe also on NT). Aliases: BAT/911-A, BAT/911-B, BAT.Chode.Worm, W95/Firkin.worm, Foreskin, BAT911, 911, DickHair, Bat/Firkin.A, Bat/Firkin.B, Firkin, Chode 911
    Simovits
  • trojan
    [trojan] Nimda. Virus / Worm / Mail trojan / Network trojan / Hacking tool. Works on Windows 95, 98, ME, NT, 2000 and XP, together with MS Internet Information Server (IIS), MS Internet Explorer 5.5 SP1, MS Outlook , MS Outlook Express and MS Word. Aliases: Concept Virus (CV) v.5, W32.Nimda, Minda, W32.Minda, I-Worm.Nimda, Code Rainbow , PE_Nimda.A, CV-5
    Simovits
Port: 138/UDP
138/UDP - Known port assignments (4 records found)
  • Service
    Details
    Source
  • netbios-dgm
    NETBIOS Datagram Service
    IANA
  •  
    NetBIOS NetBIOS Datagram Service (Official)
    WIKI
  • netbios-dgm
    NETBIOS Datagram Service. Windows Datagram Service, Windows Network Neighborhood
    Apple
  • threat
    [threat] W32.Spybot
    Bekkoame

About TCP/UDP ports

TCP port 138 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 138 in the same order in which they were sent. Guaranteed communication over TCP port 138 is the main difference between TCP and UDP. UDP port 138 would not have guaranteed communication as TCP.

UDP on port 138 provides an unreliable service and datagrams may arrive duplicated, out of order, or missing without notice. UDP on port 138 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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