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MTR also has a User Datagram Protocol (UDP) mode (invoked with "-u" on the command line or pressing the "u" key in the curses interface) that sends UDP packets, with the time to live (TTL) field in the IP header increasing by one for each probe sent, toward the destination host. When the UDP mode is used, MTR relies on ICMP port unreachable ...
The DTLS protocol datagram preserves the semantics of the underlying transport—the application does not suffer from the delays associated with stream protocols, but because it uses User Datagram Protocol (UDP) or Stream Control Transmission Protocol (SCTP), the application has to deal with packet reordering, loss of datagram and data larger ...
This is a list of TCP and UDP port numbers used by protocols for operation of network applications. The Transmission Control Protocol (TCP) and the User Datagram Protocol (UDP) only need one port for bidirectional traffic. TCP usually uses port numbers that match the services of the corresponding UDP implementations, if they exist, and vice versa.
UDT4 allowed multiple UDT connections to bind to the same UDP port and it also supported rendezvous connection setup for easier UDP hole punching. A fifth version of the protocol is currently in the planning stage. Possible features include the ability to support multiple independent sessions over a single connection.
Micro Transport Protocol (μTP, sometimes uTP) is an open User Datagram Protocol-based (UDP-based) variant of the BitTorrent peer-to-peer file sharing protocol intended to mitigate poor latency and other congestion control problems found in conventional BitTorrent over Transmission Control Protocol (TCP), while providing reliable, ordered delivery.
Shows only TCP connections (-au shows only UDP connections) netstat -ant: Shows all TCP connections with no DNS resolution (show IP addresses instead). netstat -al: Shows only listening sockets. netstat -aep: Also show PID and to which program each socket belongs, e adds extra info like the user. Run as root to see all PIDs. netstat -s
The Link-Local Multicast Name Resolution (LLMNR) is a protocol based on the Domain Name System (DNS) packet format that allows both IPv4 and IPv6 hosts to perform name resolution for hosts on the same local link.
The IP protocol identifier is 136. UDP-Lite uses the same set of port numbers assigned by the Internet Assigned Numbers Authority (IANA) for use by UDP. Support for UDP-Lite was added in the Linux kernel version 2.6.20. Support for UDP-Lite was added in the FreeBSD kernel from r264212. [3]