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Many elements are involved in establishing a VPN connection, including the following: • VPN client—The computer that initiates the connection to the VPN server. 6, you can notice that the VPN clients are the laptop computer systems labeled remote clients. • VPN server—Authenticates connections from VPN clients. • Access method—As mentioned, a VPN is most often established over a public network such as the Internet; however, some VPN implementations use a private intranet. The network used must be IP-based.

This book and the Networks- certification are designed to ensure that you have that solid foundation. Good luck! 7. Upon completion of this chapter, you will be able to answer the following questions: • What is a network? • What are the characteristics of a peer-to-peer network? • How do systems in a client/server network communicate? • What is the function of a VLAN? • What is a virtual private network? • What are the common wired LAN topologies? • What are wireless topologies? CHAPTER 1 Introduction to Computer Networking By itself, the computer sitting on your desk is a powerful personal and business tool.

It requires less cable than other topologies. It is difficult to troubleshoot. Star Topology In a star topology, each device on the network connects to a centralized device via a separate cable. This arrangement creates a point-to-point network connection between the two devices and gives the overall appearance of a star. 11 shows an example of the star topology. 11 An example of the star topology. Multiple stars can be rearranged into a treelike structure known as a hierarchical star. The hierarchical star enables for high levels of flexibility and expandability.

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