relationship..................

A relationship is the condition that how two people connected.....it could be connected, disconnected , idle ,data exchangeable, overload ,crashed....

and one way communication, two way communication.....

for example:
i know xxx, this is connected,
we get along well data exchangeable,
we cant get along well, nothing to chat idle or not dsl signal on the phone line,
quarrel =data crash,
if bandwidth not enough(friendship not deep enough),
break =disconnected.

different type of relationship:
WAN=wide area network(friendship and colleague)
LAN=local area network(family)
VPN=virtual private network(lover)
WAN, sometime have to use proxy(mean do not show your true identity), yes not need be so sincere to your friend, colleague, what aver mate, as they mind not be trustworthy.
LAN,family may turn off your firewall, as they are the only safe network they able to share whatever folder u have.

VPN, lover, sometime some playboy will use proxy to enter a VPN, so have to be careful to filter who are the only one can enter your VPN, have to verify whether they are behind a proxy or id their real IP . But sometimes for safety issue(working), have to use SSL 128 BIT to encrypted the data, and may not let 3rd party know that the VPN is accessible by u, for both welfare....for example, alot of movie star married secretly.

sometime...it is really complicated to figure out the different in between WAN and VPN, as use have to access to WAN in order to get into VPN, i was once thought tht i had granted the kay to accessed one VPN, but after that i found out , the VPN had changed password , only become part of the WAN that i used to access, i try to plug in rj45 to direct access the host, i found out is accessible, so the VPN had turn into LAN ridiculously