What namely the character of the doorway

not suppose that your label petit point, you live in a courtyard house, your adjoin has numerous small partners, there is a janitor at the door, the door to discern Uncle Lee, Uncle Lee is your gateway. When you absence a small partner in the yard to play in the yard as long as you call out his name, he heard it will answer to you, and came out to activity with you.
but you are not allowed to hike out the door, you want always contacts with the appearance world, must 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 another 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 brain pedagogue to have a menu of entire the students in your level and tel number table, your teacher 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 check the class teacher Xiao Ming's phone number right? Li Grandpa: Well, you waiting for. (Then, Uncle Lee's level teacher you hang a phone, query the small out phone) asked, his home number is 211.99.99.99
small point: Great! Uncle Lee, I'm looking for Xiao-Ming, and then help me to contact you about Xiaoming it. Grandpa Lee: No problem. (Uncle Lee then sent a request to the tel office joined to tel requests for home Xiao Ming, the final pass of course, be transferred to a small inventor 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 an analogy:
your yard more and more dwellers of a office of information where the phone switches Uncle Lee can not longer meet the absences of so many people, so had to use a varieties of fashionable technology called DHCP, when residents start to obtain a irregular phone number, and each time get the numbers may be different. Grandpa Lee in front of your home: is your gateway to your class: is your DNS server, janitor of the telephone exchange: is your DHCP server
above, Li and Wang uncle uncle called the dialogue 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 marrow, he does not Uncle Lee Uncle and Wang office phone (Grandpa and Uncle Wang Li, of course, not his phone),GHD, then there will be two situations:
1, Zhao neighborhood uncle aunt told the Sun above the Li, Wang and 2 uncle's phone (and Aunt Zhao Lee likewise told the king almost the Sun's phone), this is called a static set path
2, Zhao aunt was sick, Sun uncle called himself everywhere,GHD Green Straighteners, telling anyone, said: the This is called dynamic routing
and then one day setting does not point to detect a small tiny 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 work, you can own instantly to Sun, that Sun is of lesson directly to their own convenience,
Uncle Lee's book here called routing table. Uncle Lee
choose their own uncle, or directly to Sun to help distract the king 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,GHD IV Styling Set, if you want to transmit to Uncle Wang requires two steps to complete, where : Xiao Ming made a decision:
1st call he told his Grandpa Wang,GHD IV Black Straighteners, pipe yard, said: record changed repeatedly, 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 ahead, and Little said he was good) , Xiao Ming received the call to simulate to point a small dark and small non-communication. Because Xiao Ming guilty soul, fear of tomorrow, small point and small dark after conference face to face to ask him, and then communication hack off after they themselves to small point in the name of a small dark via a phone call to repeat it again emerge from, then there it is called file eavesdropping
Still later, a small non-point or continuous and small dark contact, and strewed small Ming, Xiao Ming and musing to himself ah: So he wanted a more insidious tricks: do? We look at:
. He contacted a digit of Hupenggouyou, and their collusion good a time every day, with everyone vocation for small dark yard admission room, content to have anything, at all times the janitor of the Sun grandfather answered the phone, you ambition hear the rain collection dress ah! ring ah! Finally 1 day, Grandpa could no resist Sun, shouted:
This is the most easy DDOS aggressions, languid mental endurance Sun grandfather phenomenon called If I would smile and they engaged in small talk, for example,GHD Precious Gift Set, tell them name are busy, this phenomenon is called Xiao Ming finally quiet for a few days ,...
A few days later, a small out into the courtyard to a smart girl called Mary, Xiao Ming is like her (a very juvenile age what puppy adore to play!), But Mary has a handsome boyfriend, Xiao Ming can not look on in despair. Here of course still must emulate the on principles: Mary is not out of the yard. The man surely can only be called Mary to bubble, so Xiao Ming and equitable nigh the corner: the grandfather is the king of the yard still memorize the phone explorer it? He is capable to manage because he has a phone address book, for the same yard may have 2 babies called Xiao Ming, can not be differentiated along the name, so each line on the address book merely two: One door phone numbers 1234567 (this is a small out) The second door 7654321 (this is Mary)
......
King Grandpa memories is not good, but it can not be erroneous, 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 for folk 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, arrangement, he finally base the sovereign grandfather had prevalent urination problems (at last, is eventually antique ah ...), a black and stormy daytime in a month, Wang Grandpa restroom, 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 person 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 understand to change ah, so he went to the door of the small explicit 一号, Xiao Ming heart of this pulchritude, ah, his father's tone of raspy Mary taught the man and Mary men and women between the unfit relationship among the results of the man Christine respectful King's hung up the phone. Of course, Mary does not know the whole thing happen ...
Hsiao Ming's behavior here is called Grandpa's book is called the king For extra message, record yard books,GHD IV Dark Straighteners, called
statement mentioning life is King Grandpa is such a system there is a written So small that in mandate to make that man can never be found Mary, and then once monthly to secretly alteration the address book, but this also had to do ah!
increase, Xiao Ming is a very intelligent, whether the contacts (ARP table) was changed to this: numbers (MAC) Phone (IP) Door No. 1234567 (This is a small out) The second gate 1234567 (Note: This is Xiao Ming changed, but the faults in his dizzy moment)
......
would be the computer will pop up a dialog carton hints Grandpa know what to do, then informed the doors One door and II, your call to repeat them. Mary knew that she was in the destruction of a good thing, this phenomenon is called Small point at home to say to tell small dark behind encryption. Potato -> Wednesday, sweet potato -> remedy, silly -> small point home. So do not point to tell a small little dark: potatoes stupid sweet potatoes. Xiao-Ming listening? ? ? Do not comprehend. . . . Depressed. . . This is encrypted. In adding, Mary also known to change his Xiaoming home phone number. So the king grandfather door one by one down the phone and house number. Outsiders are not granted to modify and conceal, only they have the opener (password). This is ip address and MAC address fastening. When someone changes a phone number, while the king would must find Grandpa changed. Trouble is difficulty, but safe. However, Wang Xiao Ming secretly to embezzle the key to Grandpa with a handful of (successful theft of the password), so he can be modified. So what, so the