c# zxing qr code generator Lesson 2 in Visual C#.NET

Printing QR Code in Visual C#.NET Lesson 2

Lesson 2
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Decode QR In Visual C#
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Analyzing the Existing Network Topology
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Read Bar Code In C#
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2-13
Generate QR-Code In .NET Framework
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Making QR Code In Visual Studio .NET
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In complex environments, you should create a map and set of documents for each LAN. On the geographic map, you should identify how the LANs are connected to one another.
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IP Addressing
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Once you have described the physical layout of the network, you should focus next on the Internet Protocol (IP) addressing scheme. Your first step should be to find out what IP address or range of addresses the company has leased from its Internet provider. Next, you should determine whether the networking is using that public range of addresses or whether they are using private addressing. You also need to determine whether IP addressing on the network is manual (unlikely on all but the smallest networks) or uses Dynamic Host Configuration Protocol (DHCP) to automatically assign information. Next, you should document information for each subnet on the network, including:
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The network ID and subnet mask as well as the range of host IDs assigned to hosts on the subnet. The default gateway assigned to hosts on the subnet. Whether the subnet contains a DHCP server or uses a DHCP relay agent. Any optional information the DHCP server is configured to assign, such as DNS server addresses. A list of Transmission Control Protocol (TCP) and User Datagram Protocol (UDP) ports used by services on the network, especially if you run custom services or have standard services that vary from using the well-known port numbers.
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Servers and Workstations
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A huge task in gathering information about a network is putting together data on the computers that make up that network. You should create an inventory of each system and determine when the system is used the most.
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Creating an Inventory
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Creating inventories of the computers on a network is time consuming and you ll want to take as much advantage of existing information as possible. However, be sure to verify any information you are given as being up to date. If there is not a comprehen sive inventory of systems, there are automated solutions available and you can proba bly get members of the IT staff to assist.
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2
Analyzing an Existing Infrastructure
When inventorying a system, you should take the following information into consideration:
The name of the computer, its current IP configuration, and its location on the network. Brand and model of the computer. If the computer is not branded (such as with a custom-built system), you must be even more diligent in listing the brand of com ponents used in building the computer. Make sure you have access to the necessary hardware drivers. The brand and model of the motherboard, along with the current basic input/output system (BIOS) revision. The processor type and speed. The amount and type of memory. The size, type, and brand of hard drives and hard drive controllers. Brand and type of network adapters. Be sure to specify what types of connections the adapter supports as well as the speed. Brands and model numbers of any attached peripherals. Be sure to include the driver or firmware version currently in place. Any services running on the system. For servers, this includes services such as DHCP, domain name system (DNS), or Windows Internet Naming Service (WINS). Workstations may also have services running. If the system is a domain controller, you must also gather the information presented in the next lesson. Installed software. Be sure to include the name of the software, the version, any updates that have been installed, and the product activation key (if available). Shared folders or printers configured on the system. Include the rights and permis sions granted to users and groups as well. Users that access the system.
Note In addition to the hardware and software requirements necessary to run Windows Server 2003, you must determine the number of domain controllers necessary to support your Active Directory plan and the hardware requirements of each domain controller. You can find a detailed discussion of this in 5, Designing a Site Plan.
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