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The Network Map feature provides you with a graphical map showing how your computer connects to the network and the Internet Typically, the map you see here isn t particularly helpful, but if you click the View Full Map link, you ll see additional network devices and how they are connected as well This feature can be helpful when you need to troubleshoot connection problems on your network As you can see in Figure 6-2, not all discovered network devices appear on the map, and there are some reasons why this can happen We ll explore those reasons when we discuss troubleshooting issues later in this chapter

SQL Server service SQL Server Agent service Browser service IIS, ASP NET 20 Notification service SQL Writer Service

FIGURE 6-1

Dim people As New PeopleDataContext() Dim xml As New XElement("people", _ From p In people.People _ Select New XElement("person", _ New XElement("id", p.ID), _ New XElement("firstname", p.FirstName), _ New XElement("lastname", p.LastName), _ New XElement("idrole", p.IDRole))) Console.WriteLine(xml) Listing3_28(xml, people)

FIGURE 6-2

To track what is occurring on a system, we need to enable auditing In this chapter, we have covered auditing at the operating system level by using group policy and even the server s local policy to implement auditing This allows us to track who logs in, what s been accessed, and even whether the server is stopped or started In previous chapters we covered using triggers for auditing We can use triggers to audit activity at the instance level or down to the database level If we want to know if someone has created a database, modified a table s schema, or even added or modified data within a database, we can use triggers DML triggers can be used to audit database activity where the data is being modified DDL triggers can be used to audit activity where the database schema is being modified or server-level changes are taking place Since DDL triggers are new to SQL Server 2005, they should be very clear in your mind before sitting down for these tests

In the middle of the Network and Sharing Center, you see a Network section, listing Access and Connection Access shows you what you can access via the network, such as the local network and Internet, and Connection shows you how you are connected, such as through a local area connection or a wireless connection You can customize the network here, making changes to the current configuration, and you can also view the current status of the network connection, as shown in Figure 6-3 If you are using a wireless connection, you ll also see a signal strength icon and a link to disable the connection If you click the Customize link, you see a simple dialog box that enables you to change the location type of the network to either a public or private network It is important that you understand these two types, so commit the following bullet points to memory

Security costs money No doubt about it Encrypting columns of data takes more time and effort to do and more management SSL encryption requires certificates Either certificates are purchased, or additional servers are stood up to host a CA, but they both cost money How is the additional cost justified Often we need to compare the costs of security vs the costs of loss Some key terms associated with cost-benefit analysis in relation to security risks are listed next:

FIGURE 6-3

A public network is a network that exists in a public area, such as an airport or coffee shop You can connect to the network, but discovery of other devices as well as your computer will be highly restricted and some programs will not work on this network Use the public network option when your computer resides in a place where you don t want other computers around you to see your computer This is a security feature so that you can still use the public network with limited risk to your computer When you are using Public, you will not see a network map in the Network and Sharing Center