network and system security

Ngày tải lên: 14/02/2014, 16:20

Ngày tải lên: 14/03/2014, 20:20

Ngày tải lên: 21/12/2013, 06:18

Ngày tải lên: 20/01/2014, 06:20

Ngày tải lên: 03/06/2014, 01:29

Ngày tải lên: 05/09/2013, 15:28

... a network is the network operating system. Just as a computer cannot operate without an operating system, a network of computers cannot operate without a network operating system. Every network ... commands, command options, and portions of syntax that must be typed exactly as shown. It also indicates commands on menus and buttons, icons, dialog box titles and options, and icon and menu ... “Introduction to Windows 2000 and Networking,” explains networking concepts and describes how Windows 2000 and networking are combined. The module introduces the concept of a domain and describes the implementation...

Ngày tải lên: 09/12/2013, 17:15

Ngày tải lên: 14/02/2014, 08:20

... IEEE 802.11a networks function and how they differ from 802.11 networks • Outline how 802.11g enhances 802.11b networks • Discuss new and future standards and how they improve 802.11 networks 3 IEEE ... 802.11a 8 U-NII Frequency Band (continued) 17 Other WLAN Standards • Future of WLANs will include: – Additional standards that are currently under development by the IEEE – New standards that are just ... transmission is significantly reduced • The 802.11a standard made changes only to the physical layer (PHY layer) – Of the original 802.11 and 802.11b standard • 802.11g preserves the features of 802.11b...

Ngày tải lên: 13/09/2012, 10:52

... enterprise firewall and a scalable high-performance web cache. It builds on Microsoft Windows 2000 security and directory for policy-based security, acceleration and management of internetworking. ... Service in Microsoft Proxy Server 2.0 and Internet Security and Acceleration Server 2000 April 9, 2003 I. BACKGROUND Microsoft Corp.'s Internet Security and Acceleration Server (ISA) Server integrates ... vụ (DoS) trong Microsoft ProxyServer, and Internet Security and Acceleration S: trang này đã được đọc lần BEGIN PGP SIGNED MESSAGE Hash: SHA1 iDEFENSE Security Advisory 04.09.03: http://www.idefense.com/advisory/04.09.03.txt Denial...

Ngày tải lên: 02/11/2012, 14:19

... organization, and contributions of the thesis. Chapter 2 describes the basic OFDM system model and MIMO system model. The wireless channel model, the principles of OFDM and MIMO systems, the ... Alamouti STBC diagram for 2×2 MIMO systems. 46 Fig 2.26: V-BLAST system diagram 49 Fig 2.27: The baseband MIMO-OFDM system model 55 Fig 3.1: Baseband OFDM system. 61 Fig 3.2: Channel estimation ... 5.2.1 System Model 128 5.2.2 Closed-Loop Capacity and Feedback SNR for MIMO-OFDM Systems 130 5.2.3 Numerical Results 136 5.3 Summary 142 Chapter 6: Capacity of OFDM systems over time and...

Ngày tải lên: 20/11/2012, 11:28

... capabilities and roles, and authorization policy defines members, sender(s), and GCKS and its authorized representatives (e.g., subordinate GCKS and rekey server). Access control lists (ACL) and capability ... Transport and applications issues The second category of problems in multicast and group security concerns security at the transport and applications layers. Since IP multicast is a network layer ... Kent, S., and R. Atkinson, ‘ Security Architecture for the Internet Protocol,’’ RFC 2401 (proposed standard), IETF, November 1998. [12] Hardjono, T., M. Baugher, and H. Harney, ‘‘Group Security...

Ngày tải lên: 02/03/2013, 16:59

Ngày tải lên: 16/10/2013, 13:15

... machine on your network. For example, to find out what your DNS settings are in Windows XP, Windows Server 2003, and Vista, click on Start then Run and type cmd and press ENTER. A command prompt will ... 2003, and Vista, click on Start then Run and type cmd and press ENTER. A command prompt will appear. Now type: C:\>ipconfig /all The result will list various bits of information about your network ... spread the load and handle the occasional down server, the NTP project have created random sets of servers using the 0, 1, and 2.pool.ntp.org names. The servers in each set randomly change every...

Ngày tải lên: 19/10/2013, 01:20

... Level1Remove value and force them to be considered Level2 attachments. [ Team LiB ] Outlook and Attachment Security Some of most common attachments you receive, such as JPG and GIF images, ... yourself: 1. Open the Registry Editor and navigate to HKEY_CURRENT_USER\Software\Microsoft\Office\11.0\Outlook \Security. 2. Right-click on the right pane and choose New, String Value. 3. Enter ... Table 6.1 , Outlook hides the attachment from you to prevent you from opening it and infecting your computer system. In reality, you can still retrieve the attachment in several ways, including...

Ngày tải lên: 28/10/2013, 13:15

Ngày tải lên: 05/11/2013, 12:15

... leading network asset management systems. We leverage our extensive knowledge of network equipment, network topology and operations support systems to bridge any gaps between the physical network and ... Power and ground • Tower and antenna For lots of different reasons, many carrier networks today are too complicated. Rapid growth, merger and acquisition, and increased demand for high-bandwidth ... design • Audit and data collection • Audit results • Operational suggestions for change management NETWORK AND INVENTORY AUDIT SERVICES FOR NETWORK PLANNING AND OPTIMIZATION NETWORK AND INVENTORY...

Ngày tải lên: 10/12/2013, 18:15

... client and connect to ftp.cisco.com. Use your CCO username and password. Step 2 Enter the command cd /cisco/web/tftp and use the ls command to view the directory contents. Step 3 Use the get command ... address, server, and file commands, and then enter the tftp command to start the download. The commands are as follows: a. If needed, use a question mark ( ? ) or enter the help command to list the ... Licenses and System Software TFTP Download Error Codes For example, random bad blocks appear as follows: <11> <11>.<11> <11> Also, tracing will show “A” and “T” for ARP and...

Ngày tải lên: 11/12/2013, 13:15

... crowd. If your network includes machines running Windows and is connected to the Internet, set up a firewall and let Linux handle your Web, FTP, and mail services. A client/server network is very ... or on the other hand you can underestimate the demands on the network, resulting in one or more machines slowing down to near uselessness. 14 Part I: Red Hat Linux System and Network Administration ... if you have a presence in that milieu, and even perhaps a print server. Hub Hub Network Backbone Network Subnet Hub 18 Part I: Red Hat Linux System and Network Administration Defined c3632-X...

Ngày tải lên: 12/12/2013, 22:15