We see such an explanation, very good
Gateway (Gateway), also known as gateways, protocol conversion device. Implemented in a gateway above the network layer internetworking , is the most complex of the internetworking device, only two different high-level protocol for network interconnection. Gateway can be used for both WAN interconnection, it can also be used for LAN interconnection. Gateway is an important task of acting as the conversion of a computer system or device. Using different communication protocols , data formats, or language, or even architecture between two completely different systems, it is a gateway translator. And bridges simply convey different information, the gateway to the information received repackaged to meet the needs of the destination system. The same layer - application layer .
Suppose your name is
Little One
(small), you live in a large yard, your neighbors have a lot of small partners,
parents
are your gateway. When a junior partner of the yard you want to play, if you shout in the yard
Gateway examples
His name, he will hear a response from you, and come out to play with you.
But your
parents
will not let you walk out the door, you want all contact with the outside world, must help you contact by phone by a parent (gateway). If you want to find your classmates chat Xiao Ming, Xiao Ming, who lives in another yard very far, he has at home parents (Bob gateway). But you do not know Xiao Ming home phone number, but your
class
teacher has a list of all the students in your class and a phone number table, your teacher is your
DNS server
. So you have the following conversation at home and parents:
Little: Mom (or Dad), I want to check the teacher Xiao Ming's phone number right? Parents: Well, you wait. (Then you give your parents a teacher hung up the phone, ask Xiao Ming phone) asked, his home number is 211.99.99.99
Little: Great! Mom (or Dad), I am looking for Xiao Ming, you help me get in touch Xiaoming it.
Parents: No problem. (Parents then sent to the telephone exchange request is turned request Xiaoming home phone, of course, is the final hurdle to be transferred to a home Xiao Ming parents there, and then put the phone to his parents to Xiao Ming).
So you and Bob made contact.
If you find out what is the gateway,
the default gateway
also like to understand. If a room can have multiple doors as a host can have multiple gateways.
The default gateway
means that if a host can not find available gateway, put the packets sent to default gateway specified by the gateway to process the data packet.
Default gateway
.
The default gateway
is generally fill 192.168.x.1