A Primary Domain Controller is a server that contains the master copy of the user database including all the user accounts, global groups, and computer accounts. The PDC verifies users as they log on or access a shared resource. Tools are also included in the PDC that are used for centralized administration, such as Server Manager for Domains and User Manager for Domains. Only one PDC can exist in a domain. The Primary Domain Controller can be changed (to a Primary Domain Controller or Backup Domain Controller) ONLY by reinstalling Windows NT Server.
Desde las Herramientas Administrativas del menú de Programas del menú de Inicio, se accede al Server manager. Este programa permite controlar el papel del servidor dentro del dominio en el que se encuentra.
PING Comando de diagnóstico del sistema IP
Ping is used to send ICMP echo requests to an IP address, and wait for ICMP echo responses. Ping reports on the number of responses received and the time interval between sending the request and receiving the response. There are many different options that can be used with the ping utility. For example, ping allows you to specify the size of packets to use, how many to send, whether to record the route used, what TTL value to use, and whether to set the "don't fragment" flag.
PMTU discovery is used by TCP: the mechanism relies on ICMP destination unreachable messages.
(1) An interface on a computer to which you can connect a device.
(2) In TCP/IP and UDP networks, an endpoint to a logical connection. The port number identifies what type of port it is.
Hay muchísimos, lo mejor es que los veas en tu propio ordenador. Los encontrarás en el directorio %windir%\system32\drivers\etc dentro del fichero Services. Para verlo desde aquí elige el enlace adecuado:
Además hay algunos no listados en este fichero:
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"PPTP traffic uses TCP port 1723, and IP protocol uses ID 47, as
assigned by the Internet Assigned Numbers Authority (IANA). PPTP can
be
used with most firewalls and routers by enabling traffic destined for
TCP port 1723 and protocol 47 to be routed through the firewall or
router.
Firewalls ensure corporate network security by strictly regulating
data
that comes into the private network from the Internet. An organization
can deploy a PPTP server running Windows NT Server version 4.0 behind
its firewall. The PPTP server accepts PPTP packets passed to the private
network from the firewall and extracts the PPP packet from the IP
datagram, decrypts the packet, and forwards the packet to the computer
on the private network."
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