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TCP/IP Protocol Suite 1 Chapter 26 Upon completion you will be able to: Virtual Private Networks and Network Address Translation Understand the difference.

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Presentation on theme: "TCP/IP Protocol Suite 1 Chapter 26 Upon completion you will be able to: Virtual Private Networks and Network Address Translation Understand the difference."— Presentation transcript:

1 TCP/IP Protocol Suite 1 Chapter 26 Upon completion you will be able to: Virtual Private Networks and Network Address Translation Understand the difference between an internet and an extranet Understand private, hybrid, and virtual private networks Understand how VPN can guarantee privacy Understand the mechanism of NAT Objectives

2 TCP/IP Protocol Suite 2 26.1 PRIVATE NETWORKS A private network is designed to be used only inside an organization. It allows access to shared resources and, at the same time, provides privacy. The topics discussed in this section include: IntranetExtranetAddressing

3 TCP/IP Protocol Suite 3 Table 26.1 Addresses for private networks

4 TCP/IP Protocol Suite 4 26.2 VIRTUAL PRIVATE NETWORKS (VPN) Virtual private network (VPN) is a technology for large organizations that use the global Internet for both intra- and interorganization communication, but require privacy in their intraorganization communication. The topics discussed in this section include: Achieving Privacy VPN Technology

5 TCP/IP Protocol Suite 5 Figure 26.1 Private network

6 TCP/IP Protocol Suite 6 Figure 26.2 Hybrid network

7 TCP/IP Protocol Suite 7 Figure 26.3 Virtual private network

8 TCP/IP Protocol Suite 8 Figure 26.4 Tunneling

9 TCP/IP Protocol Suite 9 Figure 26.5 Addressing in a VPN

10 TCP/IP Protocol Suite 10 26.3 NETWORK ADDRESS TRANSLATION (NAT) Network address translation (NAT) allows a site to use a set of private addresses for internal communication and a set of global Internet addresses for communication with another site. The site must have only one single connection to the global Internet through a router that runs NAT software. The topics discussed in this section include: Address Translation Translation Table NAT and ISP

11 TCP/IP Protocol Suite 11 Figure 26.6 NAT

12 TCP/IP Protocol Suite 12 Figure 26.7 Address translation

13 TCP/IP Protocol Suite 13 Figure 26.8 Translation

14 TCP/IP Protocol Suite 14 Table 26.2 Five-column translation table

15 TCP/IP Protocol Suite 15 Figure 26.9 An ISP and NAT

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