barcode vb.net free Lesson 1 in C#

Encoder Code 39 Extended in C# Lesson 1

Lesson 1
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Decode ANSI/AIM Code 39 In C#
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Windows Server Update Services
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9-15
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Approving Updates
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Update management includes identifying, evaluating, and approving updates. You perform each of these tasks using the Updates page of the WSUS administration site. From the WSUS home page, click the Updates link in the top navigation bar. The Updates page, shown in Figure 9-4, appears.
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Figure 9-4
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Updates administration page
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The list view in the top frame of the Updates page displays a subset of update metadata, including the update s title, classification, release date, and approval status. To locate a set of updates, use the view frame in the left task pane, with which you can filter updates by product type or name, classification, update type, approval status, synchronization date, or keywords, the last of which will allow you to search by knowledge base or security bulletin identifier or any word contained in the name or description of the update. When you select an update in the list, the details about the update appear in the details frame at the bottom of the page. Update metadata is displayed in three tabs: Details, Status, and Revisions. To approve one or more updates for distribution to client computers, select the update(s) in the list, and then click the Change Approval link in the left navigation pane. The Approve Updates dialog box shown in Figure 9-5 appears. Using the dropdown list, you can configure one of four approval options:
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9-16
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9
Maintaining the Operating System
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Figure 9-5 The Approve Updates page
Detect Only Each client will discover the update on the WSUS server and, using update metadata, determine whether the update is needed. The client will then report whether the update is needed or not and you can view this feedback to determine whether to approve the update for installation. Detect Only approval does not result in the client installing the update; the client only detects and reports whether the update is needed. Install Each client will install the update if it is needed. Because updates contain detailed metadata that describes the update and its relationship to other updates, clients can evaluate the update to determine whether it is needed. If, for example, a client has already installed a service pack, any individual update that was included in that service pack would be unnecessary, so the client would skip the update even though it was approved for installation. This behavior ensures effective use of resources by preventing duplicate or superseded updates from being installed. Not Approved Clients will not download update metadata, so they will neither detect and report whether the update is needed nor install the update. If a client has already installed the update, it will not be removed, but no new clients will detect or install the update. Remove Some, but not all, updates support removal through WSUS and Automatic Updates. Approving an update for removal causes the client to uninstall the update. Most updates can be individually removed using Add or Remove Programs.
Lesson 1
Windows Server Update Services
9-17
Note in Figure 9-5 that WSUS supports setting a deadline for installation of an update. This capability prevents even local administrators from delaying the update. If a client detects that an update has been approved for installation and the deadline has passed, the update will be installed. Although WSUS is inherently a pull technology clients query the WSUS for updates and download the updates from the server the deadline feature approaches the need to be able to push an urgent update to clients. The option selected in the Approval drop-down list and the deadline configured in the top of the Approve Updates dialog box will apply, by default, to all computers directed to the WSUS server. WSUS introduces the ability to create computer groups, a feature discussed later in this lesson. Any computer that does not belong to a computer group is represented by the built-in group Unassigned Computers. After you create computer groups, you can configure approvals and deadlines differently for each computer group. For example, you might approve an update for installation on a group of pilot systems and for detection on other systems, as shown in Figure 9-5. If the update is successful on the pilot computers and is reported as needed by other computers, you can then approve the update for installation on remaining systems. To decline an update, click the Decline Update link in the task pane of the Updates page. When you decline an update, it will not be installed by any clients; however, clients that have already installed the update will not remove it. The update installation files are not deleted from the WSUS server. You can automate the approval workflow by configuring automatic approval. Click the Options link in the top navigation bar, and then click the Automatic Approval Options link. You can instruct WSUS to automatically approve updates based on classification for either detection or installation and for one or more computer groups. This version of WSUS does not support configuring automatic approvals based on product. By default, WSUS automatically approves critical updates and security updates for detection, so soon after Microsoft releases an update of those classifications, WSUS clients will begin to report whether those updates are required. Occasionally, Microsoft will revise an update s metadata or installation files. You can configure WSUS to automatically approve revisions to already-approved updates. Microsoft might also release updates to WSUS itself, and the Automatic Approval Options page exposes an option to approve such updates automatically.
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