
Intrusion Attacks 176
External Access 176
Port Scanning 177
IP Spoofing 177
Trojan Horse Attacks 177
14
N
ETWORKING
C
ONCEPTS
Introduction to TCP/IP 179
IP and TCP 179
IP Addressing 179
Network Address Translation (NAT) 182
Limitations of Using NAT 182
Dynamic Host Configuration Protocol (DHCP) 183
Port Numbers 184
Well Known Port Numbers 184
Registered Port Numbers 184
Private Port Numbers 184
Virtual Private Network Services 184
Introduction to Virtual Private Networks 185
VPN Applications 185
Basic VPN Terms and Concepts 186
VA
PPENDICES
A
S
AFETY
I
NFORMATION
Important Safety Information 193
Wichtige Sicherheitshinweise 194
Consignes Importantes de Sécurité 195
B
T
ECHNICAL
S
PECIFICATIONS AND
S
TANDARDS
C
C
ABLE
S
PECIFICATIONS
Cable Specifications 199
Pinout Diagrams 199
DUA1611-0AAA02.book Page 9 Thursday, August 2, 2001 4:01 PM
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