What namely the character of the doorway

not assume that your name petit point, you live in a courtyard house, your neighbor has many small partners, there is a janitor at the door, the door to discern Uncle Lee, Uncle Lee is your gateway. When you want a small partner in the yard to melodrama in the yard by the time you call out his name, he listened it will answer to you, and came out to activity with you.
but you are not allowed to wade out the door, you want all contacts with the appearance globe, have to be by the door of Uncle Lee (Gateway) to help you contact by phone. If you are looking for talk with your classmates Xiao Ming Xiao Ming, who lives in dissimilar in a long courtyard, the courtyard of his house also has a doorman Grandpa Wang (Xiao Ming gateway.) But you do not know Xiaoming home phone number, but your head educator to have a account of all the students in your level and telephone number table, your educator is your DNS server. So you turntable the door at home, Uncle Lee's phone, with the following dialogue: Little Dot: Uncle Lee, I want to retard the class pedagogue Xiao Ming's phone number right? Li Grandpa: Well, you waiting for. (Then, Uncle Lee's class teacher you hang a phone, ask the small out phone) asked, his home number is 211.99.99.99
small point: Great! Uncle Lee, I'm seeing as Xiao-Ming, and then help me to adjoin you about Xiaoming it. Grandpa Lee: No problem. (Uncle Lee then sent a request to the tel bureau joined to tel requests as family Xiao Ming,GHD Red Butterfly 2011, the final pass of course,GHD Midnight Gift Set 2011, be transferred to a small author Grandpa Wang, where the yard, and then Uncle Wang Xiao Ming the phone to go home)
So you and Xiaoming made contact. The DHCP server
Well, it can be one analogy:
your yard more and more dwellers of a bureau of message where the phone switches Uncle Lee can not longer encounter the absences of so numerous folk, so had to use a kinds of fashionable technology called DHCP, when dwellers begin to obtain a irregular phone number, and each period get the numbers may be assorted. Grandpa Lee in front of your home: is your doorway to your class: is your DNS server, janitor of the telephone exchange: is your DHCP server
above, Li and Wang uncle uncle called the talk between the routes.
another: If there is still a small child called dark, he lived in the yard porter is Sun uncle, because of the small courtyard just cover the dark, Sun uncle a new conscience, he does not Uncle Lee Uncle and Wang office phone (Grandpa and Uncle Wang Li, of course, not his phone), then there will be two situations:
1, Zhao neighborhood uncle aunt told the Sun above the Li, Wang and two uncle's phone (and Aunt Zhao Lee too told the king approximately the Sun's phone), this is called a static set path
2, Zhao aunt was sick, Sun uncle called himself everywhere, differentiating anybody, said: the This namely phoned dynamic routing
and then one day setting does not point to find a small little dark, with the outcome is a small point to Lee uncle called and said: process, assuming that he knew little dark phone), Lee uncle to find a book: Sun uncle uncle to let him go, you can own directly to Sun, that Sun is of course directly to their own advantage,
Uncle Lee's book here called routing table. Uncle Lee
select their own uncle, or directly to Sun to assist divert the chief uncle called routing.
Lee chose to go directly to Sun uncle uncle was justified, because he will be able to step in directly to Sun uncle in area, if you want to transfer to Uncle Wang requires two steps to complete, where : Xiao Ming made a decision:
first call he told his Grandpa Wang, pipe yard, said: disc changed anew, this is called routing spoofing. Little Dot
find little after dark, were transferred to Uncle Wang Li uncle (in truth ought be transferred to the Sun's uncle), Uncle Wang received the call to be transferred to a small Ming (as before, and Little said he was good) , Xiao Ming received the call to pretend to point a small dark and small non-communication. Because Xiao Ming criminal conscience, fear of morrow, small point and small dark after conference face to face to inquire him, and then communication cut off after they themselves to small point in the appoint of a small dark through a phone call to repeat it again at birth, then there it is called data eavesdropping
Still later, a small non-point or consecutive and small dark contact, and radiated small Ming, Xiao Ming and calculating to himself ah: So he wanted a more insidious tricks: do? We look at:
. He contacted a number of Hupenggouyou, and their collusion good a time each day, with everybody profession for small dark yard admission apartment, content to have everything, by the time the janitor of the Sun grandfather answered the phone, you will hear the rain collection dress ah,GHD Purple Straighteners! ring ah! Finally one day, Grandpa could not withstand Sun, shouted:
This is the maximum simple DDOS attacks, feeble cerebral endurance Sun grandfather phenomenon called If I would smile and they engaged in small speak, for instance, tell them name are busy,GHD MK4 Pure Straighteners, this phenomenon is called Xiao Ming eventually calm for a few days ,...
A few days later, a small out into the courtyard to a beauteous girl called Mary, Xiao Ming is like her (a very young age what puppy adore to play!), But Mary has a handsome boyfriend, Xiao Ming can not look on in despair. Here of course still have to follow the on principles: Mary is not out of the yard. The man indeed can only be called Mary to bubble, so Xiao Ming and fair nigh the corner: the grandfather is the king of the yard still remember the phone browser it? He is competent to administer because he has a phone address book, for the same yard may have 2 children called Xiao Ming, can not be differentiated by the name, so each line on the address book only two: One door phone numbers 1234567 (this is a small out) The second door 7654321 (this is Mary)
......
King Grandpa memory is not good, but it can not be wrong, right (not with a 2 yard II Every time people must call the phone number to find out, and then go to the yard door contacts, such as people said I look knock on the door 一号
phone number here is the fable of the Business coded piece in the card)
Xiao Ming thought to myself, preparation, he finally found the king grandfather had prevalent urination problems (at the end of the day, is finally old ah ...), a dark and tempestuous day in a month, Wang Grandpa toilet, and Xiao-Ming secretly deep into janitor's room, cautiously changed Grandpa Wang contacts ......
After a few days, Mary's boyfriend gave Mary a telephone call, the human reported a phone is : 1234567 Door Phone 一号 door (this is a small specified) 一号 door 7654321 (Note: This rotated out to be Mary, but was changed Xiao Ming)
......
King Grandpa does not know to change ah, so he went to the door of the small clear 一号, Xiao Ming center of this prettiness, ah, his father's intonation of raspy Mary taught the man and Mary men and women between the improper relationship among the results of the male Christine polite King's hung up the phone. Of course, Mary does not know the entire thing happen ...
Hsiao Ming's behavior here is called Grandpa's book is called the king For more information, log yard books, called
expression saying life is King Grandpa is such a system there is a written So small that in mandate to make that man can not be found Mary, and then once every month to secretly change the address book, but this also had to do ah!
add, Xiao Ming is a very smart, whether the contacts (ARP table) was changed to this: numbers (MAC) Phone (IP) Door No. 1234567 (This is a small out) The second door 1234567 (Note: This is Xiao Ming changed, but the blunders in his dizzy moment)
......
would be the microcomputer will popup up a dialog box prompts Grandpa know what to do, then accused the doors One door and II, your call to reiterate them. Mary knew that she was in the erasure of a nice entity,GHD IV Pink Straighteners, this phenomenon is called Small point at home to say to tell small dark behind encryption. Potato -> Wednesday, sweet potato -> remedy, stupid -> small point home. So do not point to tell a small little dark: potatoes stupid sweet potatoes. Xiao-Ming listening? ? ? Do not understand. . . . Depressed. . . This is encrypted. In addition, Mary also known to change his Xiaoming home phone number. So the king grandfather door 1 along one down the phone and house number. Outsiders are not granted to adjust and hide, only they have the key (password). This is ip address and MAC address fastening. When someone changes a phone number, when the king would must find Grandpa changed. Trouble is trouble, but safe. However,GHD Blue Butterfly 2011, Wang Xiao Ming secretly to pilfer the key to Grandpa with a handful of (successful theft of the password), so he can be modified. So what, so the