VPN technology

Chapter 4 - Remote access. Objectives in this chapter: Understand implications of IEEE 802.1x and how it is used, understand VPN technology and its uses for securing remote access to networks, understand how RADIUS authentication works, understand how TACACS+ operates, understand how PPTP works and when it is used,...

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Chapter 7 - Quản trị bảo mật cho hệ thống (Security management system). After studying this chapter you will be able to: Understand the purpose of a network firewall and the kinds of firewall technology available on the market; understand the role of routers, switches, and other networking hardware in security; determine when VPN or RAS technology works to provide a secure network connection.

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This chapter includes contents: Types of remote network connections, public switched telephone network (PSTN), modems, modem communications, configuring a modem, Virtual Private Network (VPN) communications,...

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Describe the enterprise requirements for providing teleworker services, including the differences between private and public network infrastructures. Describe the teleworker requirements and recommended architecture for providing teleworking services. Explain how broadband services extend enterprise networks using DSL, cable, and wireless technology,...

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1.Connect devices that are separated by a broader geographical area. 2.Use the services of carriers, such as telephone companies, network providers… 3.Use serial connections.A VPN is an encrypted connection between private networks over a public network such as the Internet. Instead of using a dedicated Layer 2 connection such as a leased line, a VPN uses virtual connections called VPN tunnels, which are routed through the Internet from the private network of the company to the remote site or employee host.

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2.6.2 Giao thức định đường hầm lớp 2 - L2TP ( Layer 2 Tunneling Protocol ) Đây là giao thức chuẩn của IETF (Internet Engineering Task Force) sử dụng kỹ thuật khoá công cộng (public key technology) để thực hiện việc xác thực người dùng và có thể hoạt động thông qua một môi trường truyền thông đa dạng hơn so với PPTP. Một điểm đáng lưu ý là L2TP không thể sử dụng để thực hiện mã hoá. Microsoft bắt đầu cung cấp L2TP như một phần của RAS trong hệ điều hành Windows 2000. Hình 37 Giao thức L2TP...

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Before the advent of virtual private network (VPN) technology, remote connections were usually through expensive dedicated lines, or smaller organizations may have used on-demand connection technologies such as dial-up over Integrated Services Digital Network (ISDN) or Public Switched Telephone Network (PSTN). VPN has allowed companies to shift their connections to the Internet and save money, but still provide confidentiality and integrity to their communication traffic. Branch offices can be located on the other side of the city or scattered across a continent.

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QUESTION NO: 1 What are three benefits of an MPLS VPN? (Choose three) A. It provides a network-based VPN service. B. It provides equivalent security to Frame Relay. C. It eliminates the need for multiple routing protocols. D. It offers a more scalable solution than other VPN technologies.

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QUESTION .192 What are three benefits of an MPLS VPN? (Choose three) A. It provides a network-based VPN service. B. It provides equivalent security to Frame Relay. C. It eliminates the need for multiple routing protocols. D. It offers a more scalable solution than other VPN technologies. Answer: A,B,D

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