Transmission Control Protocol (TCP)

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wikipedia:Transmission Control Protocol

netstat -tn or  netstat --tcp -n 

List os TCP ports

• TCP port 587, is the default mail submission port (RFC4409).
• TCP port 1433 (Microsoft SQL server)

Activities

• Check TCP connectivity
• Read about TCP Fast Open

See also

• TCP/IP, Transport protocol, UDP, SCTP, QUIC, subnet mask, Routing protocols: BGP, routing table, Policy based routing, multicast, TCP Fast Open, RDP, TTL, RTT, MPTCP, Large send offload (LSO): (TSO, GRO, GSO, TCP checksum), ethtool, SCTP, 5-Tuple, Check TCP connectivity, TCP window size, /proc/sys/net/ipv4/tcp_rmem, ack, List of TCP ports, localhost, broadcast address
• ip [link, route], ifconfig netstat ss lsof ping ethtool mii-tool arping nmcli(RHEL) route networkctl, netplan, tc
• Networking: bandwidth, latency, Jitter, Ethernet, UPnP, MPLS, Frame Relay, ATM, TCP/IP, ARP, WiFi, BGP, Networking timeline, Router, Proxy ARP, Services & Networking