方法/步骤 1 Figure 1.2 depicts the logical relationships among applications, socket abstractions,protocols, and port numbers within a single host. There are several things to note about theserelationships. First, a program can have multiple sockets in use at the same time. Second, multipleprograms...
Internet Protocol Port Number FTP TCP 20/21 Telnet TCP 23 Simple Mail Transport Protocol TCP 25 DNS UDP and TCP 53 Trivial FTP (TFTP) UDP 69 Hypertext Transfer Protocol (Web) TCP 80 Kerberos logons UDP and TCP 88 Post Office Protocol v3 (POP3) TCP 110 Network News Transfer Protocol (NN...
Foundation of data communication of the World Wide Web with a secure connection. 443 SSLSecure Sockets LayerCryptographic protocols that provides communication security over the Internet. 53 DNSDomain Name SystemGives the names to computers, services, or any resources connected to the Internet or ...
A port is an unsigned 16-bit number in the range 0 to 65535, and is also known as a port number. Based on the communications protocol used, the sending TCP or UDP layer assigns the ports.There are specific port numbers reserved for every service. The first 1,024 ports, called the ...
SQL Server named instances are configured for TCP dynamic ports, with a port number assigned by the operating system.If you cannot use dynamic port addresses (for example, when SQL Server connections must pass through a firewall server configured to pass through specific port addresses). Select ...
UDP Port Number TCP Port Number RIP 520 - RIPv2 520 - RIPng 521 - BGP - 179 OSPF - - IS-IS - - Note that "-" indicates that the related transport layer protocol is not used. Table 10-7Port numbers of application layer protocols ...
UDP Port Number TCP Port Number RIP 520 - RIPv2 520 - RIPng 521 - BGP - 179 OSPF - - IS-IS - - Note that "-" indicates that the related transport layer protocol is not used. Table 10-7 Port numbers of application layer protocols Ap...
with IANA on port 190 TCP/UDP Reference http://www.iana.org/assignments/service-names-port-numbers/ service-names-port-numbers.xml Global ID L4:190 ID 1034 Known Mappings UDP Port 190 TCP Port 190 IP Protocol - IP Version IPv4 Support Yes IPv6 Support Yes Application Group other Business ...
Well-known port numbers Much in the same way that IP addresses are split into classes, so are ports. There are three ranges of ports: the well-known ports, the registered ports, and the dynamic/private ports. The Internet Assigned Numbers Authority (IANA) manages the allocation of port numb...
a VPN port. On the other side of the tunnel is the server you’re trying to access, with another port of its own. The specific VPN port numbers used can affect the performance and security of your connection. Choosing the right VPN port is crucial for maintaining both speed and security...