TCP/IP (Transport Control Protocol/Internet Protocol)
TCP/IP is a collection of protocols that underlies almost every form of communication on the Internet. DHCP (Dynamic Host Control Protocol)
DHCP is a method of automatically assigning IP addresses. Instead of assigning addresses to individual users, addresses are assigned by the DHCP server when clients need them. This means that instead of entering several fields of long addresses, users need only to select DHCP as their configuration method for IP networking.
PPP
PPPis the most common protocol for providing IP services over a modem. NAT (Network Address Translation)
NAT is used to share one IP address among several computers. A device set up as a NAT router uses a col- lection of “private” IP addresses (in the range 10.0.1.2 to 10.0.1.254 for example) to allow several com- puters to access the Internet using one “public” IP address. When a computer using a private IP address requests information from the Internet, the NAT router keeps a record of the computer making the request, and sends the information to the Internet using its own IP address. When the response comes back from the Internet, the NAT router forwards the packet to the appropriate computer.
Channel | Frequency | North | Europe | Spain | France | Japan |
Number | GHz | America |
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| MKK |
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|
|
|
|
|
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1 | 2.412 | X | X |
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|
|
2 | 2.417 | X | X |
|
|
|
3 | 2.422 | X | X |
|
|
|
4 | 2.427 | X | X |
|
|
|
5 | 2.432 | X | X |
|
|
|
6 | 2.437 | X | X |
|
|
|
7 | 2.442 | X | X |
|
|
|
8 | 2.447 | X | X |
|
|
|
9 | 2.452 | X | X |
|
|
|
10 | 2.457 | X | X | X | X |
|
11 | 2.462 | X | X | X | X |
|
12 | 2.467 |
| X |
| X |
|
13 | 2.472 |
| X |
| X |
|
14 | 2.483 |
|
|
|
| X |
DSSS INTERNATIONAL CHANNEL CHART
Page 27