Correct Answers: B, C, and D in Visual Basic .NET

Drawing Data Matrix ECC200 in Visual Basic .NET Correct Answers: B, C, and D

Correct Answers: B, C, and D
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A. Incorrect: There is no DHCP Server log in the Event Viewer console. B. Correct: The DHCP Server performance object in System Monitor contains
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counters that enable you to display information about the numbers and types of DHCP messages transmitted and received by the server.
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C. Correct: The DHCP Server service has its own log file, which appears as a text
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file on the computer s local drive.
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D. Correct: The DHCP console has a DHCP Server Statistics dialog box that displays
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information about the various DHCP messages transmitted by the server and about the number of IP address the server has assigned to DHCP clients.
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Objective 2.7
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Plan a Host Name Resolution Strategy
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15-41
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Objective 2.7
Plan a Host Name Resolution Strategy
Name resolution is the process of converting a computer s name into an IP address. All TCP/IP systems communicate using IP addresses; the names are just a convenience for the user. Networks running Windows Server 2003 can use several different name resolu= tion mechanisms, but the primary one is the Domain Name System (DNS). Windows Server 2003 includes a DNS Server service that is compatible with virtually all the other DNS implementations used on the Internet. Your computers need access to a DNS server if they are connected to the Internet or if you use the Active Directory directory service. Active Directory networks nearly always have their own DNS servers, but for Internet access, you can use your own DNS servers or those supplied by your ISP. To resolve Internet names, no special effort is needed beyond installing a DNS server and configuring your computers to use it. The server interacts with other DNS servers on the Internet to resolve the name of any Internet computer. To resolve your own computers names, you must create your own DNS namespace. The DNS namespace is a hierarchy of domains, with each domain containing a number of hosts. To create your own DNS namespace, you must register a second-level domain name in one of the existing Internet top-level domains (such as com or net). Then, you can create as many subdomains as you need beneath that second-level domain. The primary reason for creating subdomains is to delegate administrative responsibility for certain parts of the namespace. For example, if your organization has several offices and you want each one to manage its own DNS names, you can create a subdomain for each office. In many cases, organizations have both internal (that is, private) and external (Internet) networks, which they must keep separated. To design a DNS namespace for this type of situation, you have three alternatives:
Use the same domain name By using the same domain name for your internal and external networks, you stand the risk of having computers with the same name on both networks. Microsoft strongly recommends against this option. Use two domain names Registering two different domain names for your internal and external networks eliminates the possibility of name conflicts, but you must pay two registration fees and it can cause confusion for users having to distinguish between internal and external resources.
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Planning, Implementing, and Maintaining a Network Infrastructure (2.0)
Create a subdomain The solution that Microsoft recommends is to register a second-level domain name for your external network, and then create a subdomain beneath that second-level domain for the internal network. This solution requires only one registration fee, avoids naming conflicts, and enables you to delegate authority across the internal and external domains.
To register host names in your domain, you must create a zone on your DNS server. A zone is an administrative element that contains all or part of your DNS namespace. To ensure that your zones are always available, it is a good idea to have primary and sec= ondary zones on two separate DNS servers. A secondary zone is a copy of a primary zone. The DNS servers replicate the zone database automatically, using a process called a zone transfer. If you create Active Directory-integrated zones on a Windows Server 2003 DNS server, there is no need for zone transfers, because Active Directory replicates the database automatically. A forwarder is a DNS server that receives queries sent to it by other DNS servers that you explicitly configure to send them. You can use forwarders in a variety of ways to regulate the flow of DNS traffic on your network. To ensure that your DNS services are always available, you should create at least one redundant server, with a copy of your zones on each redundant server. You can also protect your DNS data by securing your zone transfers. The Windows Server 2003 DNS server enables you to specify the IP addresses of the servers that you allow to partici= pate in zone transfers. You can also use IPSec to encrypt the zone data as the servers transmit it over the network. Dynamic update is a feature that enables computers to update their DNS resource records when their IP addresses change. You can configure a DNS server to permit only secure dynamic updates; in this configuration, the server authenticates the computers before they can update their resource records.
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