Windows Server 2008 R2 There are seven editions: Foundation, Standard, Enterprise, Datacenter, Web, HPC Server, Itanium and Windows Storage Server 2008 R2 (Essentials Edition). History[edit] Microsoft introduced Windows Server 2008 R2 at the 2008 Professional Developers Conference as the server variant of Windows 7. On January 7, 2009, a beta release of Windows Server 2008 R2 was made available to subscribers of Microsoft's TechNet and MSDN programs, as well as those participating in the Microsoft Connect program for Windows 7. On April 30, 2009, the release candidate was made available to subscribers of Microsoft's TechNet and MSDN.[7] On May 5, 2009, the release candidate was made available to the general public via the Microsoft download center.[8] According to Windows Server Division WebLog,[9] the following are the dates of the year 2009 when Microsoft Windows Server 2008 R2 has been made available to various distribution channels: New features[edit] Service Packs[edit] Service Pack 1[edit] Processor Memory Other
Random-access memory Random-access memory (RAM /ræm/) is a form of computer data storage. A random-access memory device allows data items to be read and written in roughly the same amount of time regardless of the order in which data items are accessed.[1] In contrast, with other direct-access data storage media such as hard disks, CD-RWs, DVD-RWs and the older drum memory, the time required to read and write data items varies significantly depending on their physical locations on the recording medium, due to mechanical limitations such as media rotation speeds and arm movement delays. Today, random-access memory takes the form of integrated circuits. Strictly speaking, modern types of DRAM are not random access, as data is read in bursts, although the name DRAM / RAM has stuck. However, many types of SRAM are still random access even in a strict sense. History[edit] Early computers used relays, mechanical counters[4] or delay lines for main memory functions. Types of RAM[edit] Memory hierarchy[edit]
Android - Wikipedia From Wikipedia, the free encyclopedia Jump to navigationJump to search Android may refer to: Technology Culture Film Music The Androids, an Australian rock band Songs Fictional characters Android 17, a character from the Dragon Ball franchiseAndroid 18, a character from the Dragon Ball franchise Other uses See also Network+ Certification All-in-One Exam Guide, Third Edition: Amazon.co.uk: Michael Meyers From the Back Cover Get complete coverage of all the material included on the Network+ certification exam--the vendor-neutral standard of competency for networking professionals--inside this comprehensive resource. With full treatment of all the exam topics, as developed by CompTIA, this definitive, dual-purpose tool contains exam objectives at the beginning of each chapter, helpful exam tips, sample questions, and real-world scenarios. Get full details on all exam topics including how to: Practice Exam Software Included on the CD-ROM: Simulated exam with practice questions and answers Complete electronic book About the author: Mike Meyers, A+, Network+, MCP, is the best-selling author of five editions of A+ Certification All-in-One Exam Guide and several other computer books. About the Author
Ethernet - Wikipedia Ethernet /ˈiːθərnɛt/ is a family of computer networking technologies commonly used in local area networks (LAN), metropolitan area networks (MAN) and wide area networks (WAN).[1] It was commercially introduced in 1980 and first standardized in 1983 as IEEE 802.3,[2] and has since been refined to support higher bit rates and longer link distances. Over time, Ethernet has largely replaced competing wired LAN technologies such as Token Ring, FDDI and ARCNET. The original 10BASE5 Ethernet uses coaxial cable as a shared medium, while the newer Ethernet variants use twisted pair and fiber optic links in conjunction with hubs or switches. Over the course of its history, Ethernet data transfer rates have been increased from the original 2.94 megabits per second (Mbit/s)[3] to the latest 400 gigabits per second (Gbit/s). The Ethernet standards comprise several wiring and signaling variants of the OSI physical layer in use with Ethernet. History[edit] Standardization[edit] Evolution[edit] Notes[edit]
Build your own botnet with open source software From Wired How-To Wiki Traditionally botnet's have recked more havoc then good. By effectively controlling millions of unsuspecting user PC's, modern botnets have demonstrated the ability to manage a global infrastructure on an unimaginable scale. By applying the same techniques and approaches used in botnets within your computing environment you'll be capable of handling any demands placed on you or your infrastructure. This how-to article will take a closer look at using common open source components to create your very own botnet for the purposes for securing, protecting, load testing and managing your global internet infrastructure. Key Components include Enomalism - Open Source Cloud Computing Platform XMPP - De-centralized Command & Control OpenVPN - Encryption & Network configuration openID - Authentication (Client & Server) Server Virtualization - Botnet Application deployment More coming as we write it. Introduction to Botnets Good Vs Evil Darknet Vs Botnet Business Usages 1. 2. 3.
Wi-Fi - Wikipedia Family of wireless network protocols Wi-Fi ()[1][a] is a family of wireless network protocols based on the IEEE 802.11 family of standards, which are commonly used for local area networking of devices and Internet access, allowing nearby digital devices to exchange data by radio waves. These are the most widely used computer networks, used globally in home and small office networks to link devices and to provide Internet access with wireless routers and wireless access points in public places such as coffee shops, restaurants, hotels, libraries, and airports. Wi-Fi is a trademark of the Wi-Fi Alliance, which restricts the use of the term "Wi-Fi Certified" to products that successfully complete interoperability certification testing.[3][4][5] Non-compliant hardware is simply referred to as WLAN, and it may or may not work with "Wi-Fi Certified" devices. Wi-Fi uses multiple parts of the IEEE 802 protocol family and is designed to work well with its wired sibling, Ethernet. History Uses Modes
Computer Network - Lesson 1: Introduction to Computer Networks A computer network can also consist of, and is usually made for, more than two computers: The primary purpose of a computer network is to share resources: You can play a CD music from one computer while sitting on another computer You may have a computer that doesn’t have a DVD or BluRay (BD) player. In this case, you can place a movie disc (DVD or BD) on the computer that has the player, and then view the movie on a computer that lacks the player You may have a computer with a CD/DVD/BD writer or a backup system but the other computer(s) doesn’t (don't) have it. Based on their layout (not the physical but the imagined layout, also referred to as topology), there are various types of networks. In a peer-to-peer network, each computer holds its files and resources.
Bluetooth - Wikipedia Short-range wireless technology standard Bluetooth is a short-range wireless technology standard that is used for exchanging data between fixed and mobile devices over short distances and building personal area networks (PANs). In the most widely used mode, transmission power is limited to 2.5 milliwatts, giving it a very short range of up to 10 metres (33 ft). It employs UHF radio waves in the ISM bands, from 2.402 GHz to 2.48 GHz.[3] It is mainly used as an alternative to wired connections to exchange files between nearby portable devices and connect cell phones and music players with wireless headphones. Bluetooth is managed by the Bluetooth Special Interest Group (SIG), which has more than 35,000 member companies in the areas of telecommunication, computing, networking, and consumer electronics. Etymology According to Bluetooth's official website, Bluetooth was only intended as a placeholder until marketing could come up with something really cool. The Bluetooth logo (ᚼ, Hagall) and Uses