c# printing barcode Monitoring and Troubleshooting TCP/IP Connections in .NET framework

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Monitoring and Troubleshooting TCP/IP Connections
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c. Check for errors in the ARP cache. d. Check for hardware errors on C2.
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4. You are experiencing a delay when you connect to a remote Web site. Which tool allows you to determine whether particular routers are responsible for the delay a. Netdiag b. Network Diagnostics c. Tracert d. PathPing
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Case Scenario
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1. A user on your local subnet (Subnet E) cannot connect to any network resources.
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Ping is best used because you need to perform basic troubleshooting and the computer is local.
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2. A user on Subnet C cannot connect to resources on Subnet E.
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Tracert is best used to begin troubleshooting this problem because in this case, two routers separate the subnets. This utility enables you to determine at which subnet or router the prob lem occurs.
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3. A user on Subnet C can connect to resources on the company extranet in both branch offices, but connectivity to the Cortland branch is slow. Images often do not appear on extranet pages hosted at the Cortland branch.
PathPing is best used in this case because connectivity is erratic and slow. This tool enables you to determine whether erratic packet loss is occurring at the Cortland branch firewall or at another router.
4. A user on Subnet C reports that sometimes when she tries to specify a network resource by name, a connection cannot be established. The user knows her IP address, and you have configured all client computers on her subnet to run the Telnet service.
In this case, you can use Telnet to access the IP address in question and run Netdiag from across the network. This strategy provides you a full range of IP configuration information, including the client s configured name servers.
Questions and Answers
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A user at the Ithaca branch reports erratic network service. He does not know his IP address, and you have not enabled the Telnet service on client computers at the Ithaca office.
In this case, you can talk the user through the process of using the Network Diagnostics tool. He can then save the output to a file and e-mail you the results. Because the network problems he is experiencing are erratic, to resolve the problem you will probably need to view a wide vari ety of IP configuration information (such as that provided by this tool).
Management has asked a staff member to deploy a messaging application for use across all three branch offices. The staff member calls you and reports that although the messaging software seems to work within each branch, it does not seem to work across branches. He also does not know the TCP port number used by the messaging application.
You can use Network Monitor to determine the port number used by the application. Then you can configure the firewalls at each branch to allow traffic through that port.
4 Configuring DNS Servers and Clients
Exam Objectives in this :
Troubleshoot TCP/IP addressing Install and configure the DNS Server service Manage DNS record settings
Why This Matters
Name resolution is a complex topic that can appear difficult to understand, but mastering its concepts is nonetheless essential if you want to become a Windows Server 2003 networking expert. Because the Active Directory directory service depends on the Domain Name System (DNS) for its most basic functioning, without a clear understanding of how DNS works, you will not be able to effectively troubleshoot networks running Microsoft Windows Server 2003. This chapter introduces foundational concepts related to name resolution in Windows Server 2003 networks and, in particular, DNS. The chapter then describes the process of configuring DNS servers and DNS clients in a Windows Server 2003 network. Along the way, you are introduced to essential troubleshooting tools such as Nbtstat and Ipconfig /flushdns to help you solve name resolution problems in your network. Lessons in this :
Lesson 1: Understanding Name Resolution in Windows Server 2003 . . . . . . . .4-3 Lesson 2: Understanding DNS in Windows Server 2003 Networks . . . . . . . . .4-12 Lesson 3: Deploying DNS Servers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-26 Lesson 4: Configuring DNS Clients . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-44
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