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Overview: Windows 2003 Server, its workstation cousin Windows XP, and its predecessor, Windows 2000, all bring substantial advances in both reliability and security compared to Windows NT 4.0. However, Windows security has so many different components that just learning them all can be a major conceptual challenge. Additionally, the number and variety of threats to computer security are increasing daily, and the cost of lost, damaged, or compromised data can be very high. This briefing lays out the main security features in the Windows 2003 operating system family, and puts them all into a “big picture” context. It is intended for any person who must plan, implement, manage, or administer Windows 2003 family security for networked desktop computers, notebook computers, or stand-alone systems. It is not intended as an exhaustive treatment of all the possible security breaches that a Windows network administrator may face, but rather as a framework for understanding, planning, and discus...

If you need to free up disk space, then you need to consider various things like, 1] System Restore backup files. Do you need them all, or can you remove all but the latest one using the Windows Disk Cleanup utility? 2] Music and Video files. Video files in particular take up a lot of disk space. Can you move any of these files to other storage media? 3] Unwanted programs and applications. Inspect your Add/Remove Programs to consider what applications you don't use/never use, and whether it is safe to remove/uninstall them. 4] Use a general file cleaner like CCleaner, from http://www.ccleaner.com to clean out all temporary files and temporary internet files, and other rubbish that builds up over time. 5] Obtain additional disk space, like an external or another internal hard drive. 6] Delete Temporary Internet Files 7] Delete User's Local settings/Temp folder 8] Delete Hidden Files in Windows Folder like $Uninstall folder

Network topology is one of the very important topics to learn when it comes to build up computer network. There are many Network Topologies on which network administrator decide to build the network on. Topology is basically defined as layout or design of network, and computers are connected using the design of the topology. These topologies can be either physical or logical design. Physical topology refers to physical design of network which includes devices, cables, location and installation of network where as in logical topology it is the amount of data to be transferred with in the network as apposed in its design. There are five different Networking Topologies : a) Bus b) Star c) Ringd) Mesh e) Tree. When networks are design using multiple topologies it is called Hybrid Networks, this concept is usually utilized in complex networks were larger number of computer clients are required. Bus Topology Bus topology is one the easiest topologies to install, it does not require lots of ...

Networks are all about sharing resources of computers, servers, printers, scanners etc to each other. There are two different types with which network between computers can be formed. Networking formation completely depends on the requirement of the organization scale and usability. We should always study requirements and needs before we decide to choose any type of network. Picking wrong set of options can cost you waste of money, time and resources.Two types of networks are Peer to Peer networking also known to be p2p, the other one is Client and Server networks. Peer to peer (p2p) P2p networking type is most commonly used computer networks. This type of network is very cost effective but supports lesser number of computers in network. Ten to fifteen computers can be connected to each other using p2p networking model without problem, more number of computers often create problems. All computers possesses same status within the network and no computer control any other computer bu...

This vidoe tutorial describes how to set up a DHCP server (ISC-DHCP) for your local network. DHCP is short for "Dynamic Host Configuration Protocol", it's a protocol that handles the assignment of IP addresses, subnet masks, default routers, and other IP parameters to client PCs that don't have a static IP address. Such computers try to find a DHCP server in their local network which in turn assigns them an IP address, gateway, etc. so that they can connect to the internet or other computers from the local network. Download Now!

"Dynamic Host Configuration Protocol (DHCP) is an IP standard designed to reduce the complexity of administering IP address configurations." - Microsoft's definition. A DHCP server would be set up with the appropriate settings for a given network. Such settings would include a set of fundamental parameters such as the gateway, DNS, subnet masks, and a range of IP addresses. Using DHCP on a network means administrators don't need to configure these settings individually for each client on the network. The DHCP would automatically distribute them to the clients itself. The DHCP server assigns a client an IP address taken from a predefined scope for a given amount of time. If an IP address is required for longer than the lease has been set for, the client must request an extension before the lease expires. If the client has not requested an extension on the lease time, the IP address will be considered free and can be assigned to another client. If the user wishes to cha...

... is not accessible: Message: "....is not accessible. You may not have permission to use this network resource. Contact the administrator of this server to find out if you have access permissions. Network path was not found." Resolutions: 1) make sure no any firewall blocks the LAN traffic. 2) make sure you have created the same workgroup, and the same username on w2k/xp for logging on a remote computer. 3) check user's rights. 4) you may want to enable guest account on w2k/xp. 5) if you are using simple file sharing, you may try to disable it and re-share the drive manually. 6) if it is mixed OS (win98, NT, ME and W2K/XP) network, enable NetBIOS over TCP/IP. 7) make sure the Computer Browser service is started if all computers are w2k/xp. 8) stop Computer Browser service on win9x, ME and NT if this is a mixed OS network. 9) cache credential by using net use \\computername\share /user:username command (it is better to have the username logon shared computer). 10) if you...

TCP/IP troubleshooting tools The following list shows some of the TCP/IP diagnostic tools that are included with Windows XP: Basic tools : • Network Diagnostics in Help and Support Contains detailed information about the network configuration and the results of automated tests. • Network Connections folder Contains information and configuration for all network connections on the computer. To locate the Network Connections folder, click Start, click Control Panel, and then click Network and Internet Connections. • IPConfig command Displays current TCP/IP network configuration values, updates, or releases, Dynamic Host Configuration Protocol (DHCP) allocated leases, and display, register, or flush Domain Name System (DNS) names. • Ping command Sends ICMP Echo Request messages to verify that TCP/IP is configured correctly and that a TCP/IP host is available. Advanced tools • Hostname command Displays the name of the host computer. • Nbtstat command Displays the status of current NetBIOS...

Cisco has defined a hierarchical model known as the hierarchical internetworking model. This model simplifies the task of building a reliable, scalable, and less expensive hierarchical internetwork because rather than focusing on packet construction, it focuses on the three functional areas, or layers, of your network: Core layer: This layer is considered the backbone of the network and includes the high-end switches and high-speed cables such as fiber cables. This layer of the network does not route traffic at the LAN. In addition, no packet manipulation is done by devices in this layer. Rather, this layer is concerned with speed and ensures reliable delivery of packets. Distribution layer: This layer includes LAN-based routers and layer 3 switches. This layer ensures that packets are properly routed between subnets and VLANs in your enterprise. This layer is also called the Workgroup layer. Access layer: This layer includes hubs and switches. This layer is also c...

The Switch A switch is a layer 2 network device that forwards frames using MAC addresses in the header of frames. It is used to improve network performance by:- • segmenting the network and creating separate collision domains. • reducing competition for bandwidth. In a switch frame forwarding is handled by specialized hardware called "Application Specific Integrated Circuit" (ASIC). ASIC technology allows a silicon chip to be programmed to perform specific functions much faster than that of a chip programmed by software. Steps of Switch Functioning Learning When switch starts, the MAC address table has no entry. When a node transmits data on its wire the MAC address of the node is learned by Switch Port connected to that node. In this way all the MAC addresses are learned by respective ports and these entries remain in the cache for a specific time. If during this specific time no new frame arrives from a node MAC address entry for that node is dropped from cac...

Microsoft Outlook is an email client (Mail User Agent to some) which I'm sure you know what it does. If not, let me try to explain it as simply as possible. Email clients are programs or application's which retrieves emails from the web server and downloads it onto your desktop. Now with that out of the way, did you know that you can lose your mails because of your email client? This is a big deal as email is now a large part of communication both in the corporate world and the private/home user. How can you lose your emails? When you use email clients, you risk losing your email just like any other data on your desktop. Here is a list: - Virus attack - Corrupted partitions/volumes - Deletion/Format - Hard Disk Crash - Theft/natural disaster In Microsoft Outlook versions 2003, 2002, 98 and 97, once Outlook's PST file size goes above 2gb, your emails, or rather, the PST file, gets corrupted. - PST corruption Installation of anti-virus/anti-spyware Prevention of viruses, spyw...

I know this is a lot of information to read and understand. Think of it as an investment and not a burden. I have tried to include what is necessary without writing a whole book about a 5 minute procedure. Summary of steps to install a network printer. 1. Download the most recent driver from the manufacturer's website. 2. Configure network settings on the printer. 3. Use the Add Printer Wizard to create a local network printer on the pc. 4. (Optional) - share printer to other users. If you are performing this type of installation for more than a handful of people, it is best to install this once on a Windows Server and share that printer to everyone. Normally it takes between 5 and 10 minutes to perform this type of install on each pc. 1. Download the most recent driver. Visit the manufacturer's website to obtain the latest driver - print drivers can be found in the support area searching by model number. ( this is important because early problems are fixed and drivers are upda...

Keyboard Shortcuts: This article explains how you can become faster, more efficient, and potentially even reduce RSI by using your keyboard more often to do more of the tasks that you normally think only the mouse can do. When testing this article on colleagues, I have yet to find a single person who hasn't learnt at least something new, even 15 year IT veterans! Keyboard Short Cut - Copy, Cut and Paste: The most common keyboard short cuts used are Copy CTRL+C, and Paste CTRL+V which are used by selecting (or highlighting) text, pressing CTRL+C to Copy this text to the clip board (a Windows temporary storage area that can only remember 1 thing: always the last thing Copied) and then Pasting this text to another Text Box using CTRL+V. Instead of copying however, the original text can be removed using Cut: CTRL+X. This deletes the original text but also copies it to the clip board so it can Pasted somewhere else. Additionally, highlighting text with the keyboard can be done using the...