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 VPN ????????
  ~?Singlehunter?~
โพสต์ Aug 28 2009, 06:25 PM
โพสต์ #1

God Member
ภาพประจำกลุ่ม
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กลุ่ม : ??????????
โพสต์ : 1,202
เป็นสมาชิกเมื่อ : 3-December 08
จาก : RMUTT
หมายเลขสมาชิก : 1
????????:???

??? :

??????????? :




VPN ???????? ???????????????????? ???????????? VPN ????????????? Intranet ????

VPN ???? Virtual Private Network ??????? ?????????????????????? ?????????????? ???????????? ???????????????? ??????????????? ?????????????????? ???????????? ???????????????????????? ???????????? ??????? ??????????????????????? ?????????????? ????????????????????

??????????? ????? VPN ?????????????????????????????? (???? Gateway ??? Router), ????????? ???????????????????????
??? ???????????????? ???????????????? ????????????????? ??????????????????????? ?????????????????????? (encryption) ????????????????? 2 ??? Data Link Layer ??????????? ??????????????? IP Layer ?????????????????? IPSec (IP Security)

???? ???? VPN ??????????????????????????? ???????????????????????? ?????????? ?????????????????? ?????????????? ???????????????????????????? ????????????? ??????????????????????? ???? ??????, ???????????? ???????

??? ?????????? ?????????????????????? VPN ?????????????? ??? MPLS (Multiprotocal Label Switch) ???????????????????????? ????????? label ?????????? ?????????? ????????????????????? ??????? ????????????????????????? ??????????????? ???????????????????????? ?????????? ?????????????????????????? ?????????? Virtual LAN ?????????? ??????? ????????????????????

???????? ???? ?????? A ??????? VPN label A ????????????? ?????????????? ?????? B ???????????????????????? B ?????????????? ????????????????? ?????????????????????? Label ????? ?????????????? ???????????????????? VLAN ????????????????

???????????? VPN

?????? VPN ??????????? 3 ??????

1. Access VPN: ??????????????????????????????? VPN ????????????????????????? ??????????????????????????????? 2 ?????? ???????????? ????????????????????????????? ????? ???????? ???????????????????????? ??????????? ??????????? ???????????????????????? ????????? ??????????????????? ???????????? ??????????????? ?????????????? ???????????????????????????? (Network Access Server-NAS) ?????????????? ???????????????? ?????????????????? ?????????? ????????????????????? ?????????????????????

2. Intranet VPN: ??????????????????????????????? VPN ?????????????????????????????? ???? ????????????????????? ????????????????????????????? ??????????? ????????????? ????????? ???????? ?????????????????? ??????? ????????????????????? ??????????????? ?????? ???????????????? ???????????????????????? ??????????????? ??????????????? ???????? VPN ???????????????????

3. Extranet VPN: ??????????????????????????????? ??????????? Intranet VPN ??????????????????? ?????????????? ???????????? ????????????? ??????????????????????? ?????????????????? ????????????????? VPN ??????????? ???????????????????????? ?????????????????????????? ??????????? ?????????????? ???????????????? VPN ????????????????????? ???????? ??????? ?????????????????????? ????????? ??????????? ?????????????? ????????????????????

???????????????????? VPN


???????? ??? ?????????????????????? VPN ???????????? ????????????????? ??????????????????????? ???????????????? ??????????????? ????????? VPN ???????? ??????????????? ??????? ????????????????????????? ??????????? ?????????? ?????????????????? ????????? ????????????????????? ??????????????????????? ????????? ????????????? VPN ????????? ??????????????? ???????????????? ???? ???????????????? ???????

??? ?????????? ???????? ???????????????????????? ???????????? VPN ?????????????????????? ?????????? ???????????????? ????????????????? ???????????????????

credit : http://www.cisco.com


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????????? VPN ???????

VPN ???????? Virtual Private Network ?????????????????????????????????????????? (WAN - Wide Area Network) ???????????????????????????? ????????????????????????????????????????? ???????? Internet ??????????? ??????? Tunneling ???????????????????????????????????????? ??????????????????????????????????????? ????????????????????????????????????????????????????????????????????????????????
??

????????????????????????? Private Network

?????????????????????????????? IP ????????????????????? ?????????????? ???????????????????? ????????? login ????????????????????????????????



PN : Private Network ???????????????????????????????, Private Network ???????????????????????????????????????????????????????????????? (??????????????????????? TCP / IP ?????? IP ????????????? 10.xxx.xxx.xxx ???? 192.168.xxx.xxx ???? 172.16.xxx.xxx) ?????????????????????????????? leased line ??????????????????????????????????? Internet ????????????????????????????????? ??????????????????? ??????????????????????? ?????????????????????????? leased line ???? Frame Relay ????????????? ???? Internet ???????????????? ??????????????? Virtual Private Network



??????????????????????????????????? VPN ???????????????????? "VPN is Private Communications Network Existing within a Shared or Public network Especially the Internet" ???????????????????? ?????????

* ????????? VPN ???????????????????????????????????????????????? ????????????????????? ????????????????????????????
* ????????? VPN ???????????????????????????????????????? ??????????????????????????????????????? ?????????????????????
* ?????????????????????????????????????? VPN ??????????????????????????



????????? ??????????????????????????????????????????????????


?????????????? VPN?

???????????????????????????????????????????????????????????????????????????? ???????????????????????????????????????????? ???????????????????? Network ???????????????????? ???????????????? (leased line) ???????????????????????????????????????????????????????????????????????? ??????????????????????????????????????????????????????????????? ?????????????????? ????????????????????????????????? ?????????????????????????????????? ?????????????????????????????? ??????????????????????????????????????

????????? VPN ????????????????????????????? ?????????????????????????? Internet ?????????????????????????????????????????????????????????????? ?????????????????????????? (Tunnel) ??????????????????????????????????? ???????????????????????????????????????? ?????????????????????????????????????????? ???????????????????????????????????????????????? ????????????????????? ???????????? leased line ??????????????????? VPN ?????????????????????????????

credit : http://www.siamcafe.net/vpn/





CPU AMD AthlonX2 4600+ Claim to 5200+
Heatsing 120 Ultra Extreme
Board M2N-E
RAM G-Skill 2NQ 2GB 1*2GB Over@800 Bus
VGA GALAXY 8800GTS 320MB
HDD Seagate 250GB Buffer 16 MB
PWS 500 WATT ENERMAX LIBERTY
Case Cooler Master Centurion 5


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