PC上的端口号
PC上的端口号在网络技术中，端口包括逻辑端口和物理端口两种类型。[*]物理端口：是用于连接物理设备之间的接口，如ADSL Modem、集线器、交换机、路由器上用于连接其他网络设备的接口，如RJ-45端口、SC端口等等 。
[*]逻辑端口：是指逻辑意义上用于区分服务的端口，比如用于浏览网页服务的80端口，用于FTP服务的21端口等。如TCP/IP协议中的服务端口，通过不同的逻辑端口来区分不同的服务。一个IP地址的端口通过16bit进行编号，范围是从0 到65535;
[*]well-known ports: 0 to 1023 (0 to 210 − 1); used by system processes that provide widely used types of network services. On Unix-like operating systems, a process must execute with superuser privileges to be able to bind a network socket to an IP address using one of the well-known ports；
[*]Registered ports: 1024 to 49151; They are assigned by IANA for specific service upon application by a requesting entity.[ On most systems, registered ports can be used without superuser privileges.
[*]Dynamic, private or ephemeral ports: 49152 to 65535; used for private or customized services, for temporary purposes, and for automatic allocation of ephemeral ports.
{:6_290:} 感谢分享 呵呵哈哈哈
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