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Page CIS 2149 Syllabus
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Chapter 11 Lesson Notes
Implementing, Managing, and Troubleshooting Network Protocols and Services
I. Configuring and Troubleshooting the TCP/IP Protocol
Carefully review the four transport layers of the TCP/IP protocol:
The Application Level
In most enterprises, there are at least two separate WANs in place, one for voice, the other for LAN data. There may also be on-demand video WAN, as well as a separate X.25 or an SDLC WAN for IBM SNA traffic. A smart network runs all applications across a single, high-bandwidth networking platform, creating the opportunity for convergence of voice, data, and video. The following technologies are currently available to design and implement Wide Area Networks that converge voice, video, and data.
Voice Applications.
Data Applications. Groups and teams working together over a network do a great deal of file-sharing. The areas of greatest growth are in engineering, architecture, electronic publishing, Web publishing, and technical imaging. Many involved in networking management recognize the need to prioritize e-mail messages and file transfers.
Video Applications. Since a human being receives about 70 percent of the information the brain processes as visual information, it makes sense to deploy video applications whenever possible. Video teleconferencing is a high priority in many enterprises, bringing people together for cost-effective virtual meetings. Video on demand and real-time video are also becoming higher priorities, especially when using the Web as a delivery platform.
Multimedia Applications. Multimedia is combined graphics, text, and audio. Broadband applications are driving the need for deploying smart networks. Web-based virtual reality and multicast TV and radio networks are becoming more commonplace, delivering news, stock quotes, research and other vital business information to the desktop. Users don’t want their information flow interrupted, or an information request denied because the browser doesn’t have the appropriate "plug-in" applet installed. A smart network has already done this work for them.
The Transport and Network Level
There are two types of networks that must be evaluated in order to fully deploy convergence over an smart integrated network. They are the WAN and the LAN. The costs savings that can be realized from smart networking on the WAN dictate that it be evaluated first.
Evaluating the Wide Area Network. A WAN needs to be a single, integrated network, capable of delivering the three types of applications discussed, using common bandwidth. The alternatives are leased lines or a public IP network, or building a private smart network.
Evaluating the Local Area Network. The LAN interplays with the WAN in many subtle and significant ways. Interestingly, many enterprises are learning that overall costs decline as high-speed LANs are installed. One obvious reason is that LANs can be connected directly to the Internet via a server or a corporate Intranet, thus turning the Internet into the WAN. A second reason is that users don’t have to sit idle while waiting for information to appear on their screens. Yet another argument is that the newer LANs, far more efficient and less troublesome, require less maintenance.
In fact, it is possible that by fine-tuning or upgrading LAN service, you may be able to compensate for some services the WAN does not provide. In large part, this has to do with the differing levels of current LAN service.
Review the following Troubleshooting Tools, described on pages 590-597:
A. Configuring a DHCP Client
Review the advantages of using the Dynamic Host Configuration Protocol which performs automatic configuration of the client, greatly simplifying TCP/P installs of:
Exercise 11-1 on page 599 walks through a DHCP client install. Be sure to note the new feature, Automatic IP Addressing, or AIPA. Note that the Exam Watch on page 598 says that questions about new features are often on the exam. Make sure you fully understand how to configure Windows 2000 Professional as a DHCP client. Remember that the DHCP server, as well as routers and other hardware, have to be assigned static IP addresses.
B. Assigning a Static IP Address
Teaching Tip
This is an important topic, as a great deal of network setup concerns IP addressing and subnets. Cover pages 600-603 carefully.
Exercise 11-2 on page 604 explains how add a snap-in to the MMC. Refer to the first full paragraph on page 608, where you are shown how to create new policies with a snap-in, using their newly acquired skills. This invokes a wizard to complete the steps.
Be sure you fully understand how to configure the TCP/IP properties described in Figure 11-9 on page 603.
C. Add IPSec
IP Security is necessary for encryption and authentication, two major security issues in nearly every organization. The overview on 605 explains IPSec from the technical viewpoint. Be sure to review configuring policies on pages 607-608:
D. Configuring DNS
This is not a Windows 2000 Professional function, but rather comes with the server products. It is important to understand DNS’s role, since the Active Directory is primarily based on the hierarchical DNS namespace.
Cover the types of domains (use Figure 11-13 on page 610):
Zones are illustrated in Figure 11-14 on page 611. Be sure to carefully cover name servers and DNS name resolution carefully.
This lesson ends with dynamic DNS, which is becoming more commonplace. You might want to compare and contrast DNS and DDNS. Cover the Scenario & Solution on page 614 to review this lesson.
II. Connecting to Computers by Using Dial-Up Networking
This is a very straightforward lesson, and,for anyone who has worked with previous versions of Windows, it should be very familiar. Most of the Dial-Up Networking (DIN) setup is accomplished by the wizard.
Review the lesson beginning with Figure 11-15 on page 615 and Exercise 11-3 on page 616, the Network Connection Wizard. Most of the material in this lesson can be stepped through directly from the text.
A. Virtual Private Network (VPN) Connection
Insider Information
VPN Administration (from the Microsoft web site)
The system administrator can use Active Directory in Windows 2000 Server to configure virtual private network (VPN) user and group security settings. This is describe at:
http://windows.microsoft.com/windows2000/en/professional/help/default.asp?PaneName=Search&ShowPane=true&TopicUrl=http%3A//windows.microsoft.com/windows2000/en/professional/help/default.htm
Insider Information
Microsoft DIN Best Practices (from the web site):
Tip: The following link provides best practices for implementing Network and Dial-up Connections. For more information about enabling DHCP, see To configure TCP/IP settings at:
http://windows.microsoft.com/windows2000/en/professional/help/default.asp?PaneName=Search&ShowPane=true&TopicUrl=http%3A//windows.microsoft.com/windows2000/en/professional/help/default.htm
Tip: When using multiple network adapters, rename each local area connection. For more information, see To copy a network or dial-up connection at:
http://windows.microsoft.com/windows2000/en/professional/help/default.asp?PaneName=Search&ShowPane=true&TopicUrl=http%3A//windows.microsoft.com/windows2000/en/professional/help/default.htm
Tip: When using one network adapter and connecting to multiple LANs, enable or disable the network components for each LAN connection. For more information, go to this link:
http://windows.microsoft.com/windows2000/en/professional/help/default.asp?PaneName=Search&ShowPane=true&TopicUrl=http%3A//windows.microsoft.com/windows2000/en/professional/help/default.htm
B. Remote Access Server
Review the three kinds of connections using Windows 2000 Workstation that allow incoming calls:
You can set up a callback function for greater security. Review the Exam Watch on page 618 to discuss the number of incoming connections permitted: three using Windows 2000 Workstation and unlimited using Windows 2000 Server.
Insider Information
See page 621 for a discussion on EAP. Go to the Microsoft web site for more on this topic.
The Extensible Authentication Protocol (EAP) is an extension to the Point-to-Point Protocol (PPP). Follow this link for more information on configuring EAP connections:
http://windows.microsoft.com/windows2000/en/professional/help/default.asp?PaneName=Search&ShowPane=true&TopicUrl=http%3A//windows.microsoft.com/windows2000/en/professional/help/default.htm
C. Configuring and Troubleshooting Internet Connection Sharing
Carefully review the concepts for ICS in the first paragraph on page 622, in particular setting up ISP accounts for users. Note that the Device Manager is very helpful for setup and troubleshooting.
An excellent list of common problems and solutions is found on page 623. Use the Scenario & Solution on page 624 to review the lesson.
III. Connecting to Shared Resources on a Microsoft Network
This lesson extends the discussion of sharing that is mentioned several times earlier in the Study Guide. Sharing is a primary reason for networking, which includes files and resources. Be sure to note Read permissions from the Exam Watch on page 625. Permissions are set in Properties dialog boxes.
Caching permits sharing while offline. Use Exercise 11-4 on page 626 to show how this is set up.
A. File and Print Sharing for Microsoft Networks
Run through the print definitions on page 628 (also covered in the Scenario & Solution on page 632 ):
The print server software must be installed, then the local printer installed. This is done using the wizard (see Figure 11-19 on page 629). Mention that you can also install a network printer, as shown in Figure 11-20 on page 630. Lastly, the client computers must have the printer driver software installed to issue commands to the printer(s).