9781111640125_IM_ch06

Security+ Guide to Network Security Fundamentals

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Security+ Guide to Network Security Fundamentals, Fourth Edition 6-1 Chapter 6 Network Security At a Glance Instructor’s Manual Table of Contents Overview Objectives Teaching Tips Quick Quizzes Class Discussion Topics Additional Projects Additional Resources Key Terms
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Security+ Guide to Network Security Fundamentals, Fourth Edition 6-2 Lecture Notes Overview There are a number of different security devices available to protect the network and the devices on the network. This chapter covers some of those devices, the different mechanisms for employing basic protections in the network design, and some ways to enhance the security of the network through the layout and positioning of certain pieces of network equipment. Chapter Objectives List the different types of network security devices and explain how they can be used Define network address translation and network access control Explain how to enhance security through network design Teaching Tips Security Through Network Devices 1. Explain that a basic level of security can be achieved through using the security features found in network hardware. This includes standard networking devices as well as hardware designed primarily for security. Standard Network Devices 1. Explain that the security functions of standard network devices can be used to provide a degree of network security. 2. Mention that these standard network devices can be classified based on their function in the OSI model. 3. Refer to Table 6-1 for the seven layers of the OSI reference model. 4. Explain that a hub is a standard network device for connecting multiple Ethernet devices together by using twisted-pair copper or fiber-optic cables in order to make them function as a single network segment. 5. Contrast a hub with a switch, which is a device that connects network segments; However, unlike a hub, a switch has a degree of “intelligence.” 6. Refer to Table 6-2 for ways to protect a switch. 7. Discuss the purpose of a router.
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Security+ Guide to Network Security Fundamentals, Fourth Edition 6-3 8. Explain that load balancing is a technology that can help to evenly distribute work across a network. Network Security Hardware 1. Emphasize that although standard networking devices can provide a degree of security, hardware devices that are specifically designed for security can give a much higher level of protection. 2. Discuss the purpose of a firewall and where hardware firewalls are usually located. 3. Explain that a firewall can take several actions when it receives a packet, such as allow (let the packet pass through and continue on its journey), block (prevent the packet from passing to the network by dropping it), or prompt (ask what action to take).
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This document was uploaded on 03/01/2012.

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9781111640125_IM_ch06 - Security+ Guide to Network Security...

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