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November 15

常用的TCP的标准端口:

                                      ftp-data                 20
                                      ftp-control              21
                                      sshd                      22
                                      telnet                    23
                                      smtp                      25
                                      pop3                      110

IP地址的分配:

  A类:0-126
  B类:128-191
  C类:192-223
  D类:223-239
  E类:240-255
D类地址用于组播,E类地址保留。
 
 私有网络使用的IP地址:
A类:    10.*.*.*
B类:    172.16.*.*  ~  172.32.*.*
C类:    192.168.0.*  ~  192.168.255.*
 
欢迎来到我的小屋
This person's network is empty (or maybe they're keeping it private).