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()
:1-((Network Address Translation.
2-(port addressing and PDU.)---------------------------------------------------------------------
::62:
Router1CompanyRouter2ISP Terminal(Console).
:192.168.6.126:192.168.6.126
:192.168.6.64S 2/0Router1:192.0.2.113S 2/0Router2:
192.0.2.114
5::198.118.32.65
:198.118.32.70:/29255.255.255.248
.
:/26255.255.255.192
.
.
.
.
.
.
Router1
Router2
Switch
..
Pc1 Pc2 Pc3 Pc62
Terminal
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2
:Router-PTCompany
ISP
62..4.Switch-PTTerminal
:Switchcooper straight-through:
o0Switcho1Switcho2Switcho3Switch
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:-Switch4Switch.
6Switch/00Router-company
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Serial DCE:
Serial 2/0Serial 2/0.
Terminalconsole:consoleRS 232.
:(Router-company):
o:FastEthernet 0/0Port statusON
IP:192.168.6.126:255.255.255.192
o:Serial 2/0
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Port statusON
IP:192.0.2.113
(clock rate)
clock rate:64000.
(Router-ISP):oSerial 2/0
Port statusON
IP:192.0.2.114oclock rate:64000
:oGateWay:192.168.6.126
oIP:192.168.6.125:255.255.255.192
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oIP:192.168.6.124:255.255.255.192
oIP:192.168.6.123:255.255.255.192
oIP:192.168.6.122:255.255.255.192
.
:Router-ISP
Host
.
:
:Terminal: (Host:(TerminalHost:.
Terminal:
TerminalDoc.DesktopTerminalOK
oCompanyoenable:
Company>enable
.o::
Company>exit
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oenable:Company>enable
Company#configure terminalEnter configuration commands, one per line. End with CNTL/Z.Company(config)#
/NatPool:
5.:-NatPool:198.18.32.65
:198.118.32.70:/29255.255.255.248
:Company(config)# ip nat pool mypool 198.18.32.65 198.18.32.70Netmask 255.255.255.248
5 IPs)).
/mypool:
Company(config)# access-list 1 permit 192.168.6.64 0.0.0.63
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Access listlistAccesslist192.168.6.64
()63=== .show ip Nat translations
.5:
Outside
global
Outside
local
Inside localInside
global
pro
router
internetcontrol massage
protocol
router
198.18.32.65inside localinside global.
()ip
simulation( )(forward):
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2
pc0isp:
:ipisp
isp
:
:router companyisp
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isp198.18.32.65
6571.
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4
:Port addressing and complex PDU(
:)
sample pdu(icmp):
::ip
data link:mac address
complex pdu:
(,,) ::HTTP,
SMTP,FileTP.
TCPsimulationedit filterTCP
.
:.Routergeneric2.switchgeneric3.3
switch
routerswitchcopper straight throw
routerservercopper cross over
:
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5
:-1.1.1.1port status
:on
-:2.2.2.2
-configGatewayrouter :
-configfastEthernet.:1.1.1.2:1.1.1.3:1.1.1.4:
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-GatewayconfigGlobal:
-2.2.2.1:
simulationedit filterTCP,HTTP:
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,:
1.HTTPport address2.destination IP addressdestination
Source port .31325511
.4on shot time()11
.5creat pdu:
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:port addressHTTP81FTP2:
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capture/forward
-:
-Source port : 5500 ,destination port : 80
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:-packet tracerOSI
.-
(,,).
-.
:
:
