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RedHat Enterprise Linux 5.3

Diposting oleh Admin Jumat, 27 Maret 2009 0 komentar

RedHat, on last January has been released the fourth Enterprise Linux commercial distribution, RHEL 5.3. RHEL 5.3 has 150 improvised feature made in Fedora, as a project sponsor that makes the development of RHEL. RedHat uses Fedora as the foundation for RHEL. RHEL 5.3 has support with the processor Intel "Nehalem" Core i7, which is released in November ago, which is implemented in 45 nanometer process. RHEL 5.3 has a microarsitektur and interconnection QuickPath called Opteron, which will be stored on the server at the end of March.

RHEL 5.3 does not only run on Intel processor chip, but also with the Xeon chip, the variations of Nehalemn to the server that beasr with eight cores, plus two in each virtual core. In four-socket system, an operating system and application dipaketkan in one motherboard with DDR3 main memory. RedHat party when using the chip with four-core Nehalem desktop version of RHEL 5.3 so this will show best performance of the Core i7.

RHEL5.3 equipped with OpenJK, an implementation of Java SE 6 development kit and runtime for Java. This means that RHEL 5.3 will have the same code such as jdk from Sun Microsystems. OpenJDK in RHEL 5.3 also support this with the JBoss Enterprise Application Platform. RHEL 5.3 also support the Global File System 2, available in RHEL 5.2. There are features of Linux Unified Key Setup (luks) that support disk drive with encryption, as well as iSCSI boot can make the operating system booting from a disk connected to the iSCSI link.

Technology in eCryptfs including RHEL 5.3, the file system cryptography, and Stateless Linux, Linux for replication, and the preview for the GNU GCC 4.3 compiler set (C, C + +, and Fortran). Customers who want to update RHEL does not charge, since RedHat does not determine the cost to upgrade to RHEL 5.3 is.

ISP is an acronym of Internet Service Provider. You need to have an ISP to connect to the Internet. When choosing Internet service provider, then you must take into account the needs, equipment, and budget, especially regarding the payment per month for Internet services. ISP present at the beginning of 1960. United States Defense Department, or more precisely the company Advanced Research Projects Agency (ARPA) has established the first Internet, that is, the ARPAnet in 1966.

The first time, the network has several Internet ARPAnet node at the University of California at Los Angeles and Stanford University. In 1989, Tim Berners-Lee is the first time showing the World Wide Web. He wrote the first web server, as a program that can be used as a web browser and an editor. Internet is a global computer network, while the World Wide Web (WWW) using HTTP (hypertext transfer protocol) as a method to share information on the Internet. WWW is the other method with SMTP (Simple Mail Transfer Protocol), FTP (File Transfer Protocol) and Internet Relay Chat (IRC). While examples of the first Internet service provider CompuServe is and PSINet.

There are four basic types of Internet services. Dial-up, ISDN (Integrated Services Digital Network), Digital Subscriber line (DSL) and cable. Mode Dial-up service is the most with the slow download speed limitation of 56Kbps (Kilobit per second). While ISDN offers speed 64Kbps, DSL service is the next fastest with a speed of 128Kbps download. For cable tinngi have more speed to 30Mbps over.

Unlike dial-up connections, DSL and cable connections more open over time and making it easily attacked by viruses and hackers, so that antivirus software should be fixed in the update routine. In addition, older computer with a slow processor and memory capacity of a little connection to the Internet faster, it will make the connection slower.

DSL connection has the same price or less than dial-up. You can also use the phone and surf the web in the DSL at the same time, while in the dial-up, you had to disconnect Internet-akan when using the phone. If you download or upload large files, or watch streaming video or spend a long time to surf the web, then the DSL connection is not enough to do so. Therefore, the need to use a connection via cable to increase speed.

IC (integrated circuit)

Diposting oleh Admin Senin, 16 Maret 2009 0 komentar

IC (integrated circuit) is the other name of chip. IC electronic tools are made from semiconductor material. IC chip or an embryo of a computer and all types of devices that use a technology other micro-controller.

IC found in 1958 by an engineer named Jack Kilby, who works at Texas Intruments try to solve the problem with thinking about a concept combining all the electronics components in a block that is made from semiconductor materials. The findings are then called IC (Integrated Circuit) or commonly called a chip and then. Some time after that, Robert Noyce, who worked on the Fairchild Semiconductor Corporation, to find similar things, although they are working on two different places.

Since then a lot of research conducted to develop IC (integrated circuit) or Chip to the present.

A founder of Intel, Moore curtain, in 1965 estimates that there are a number of transistor in an IC will be 2 times every 18 months. Trend of increased number of transistor after this has been so long and will continue to be estimated.

This can be seen in the development of the IC, a 64-Mbit DRAM is the first time in the market in 1994, consists of 3 million transistor. Microprocessor and the Intel Pentium 4 comprises more than 42 million transistor, and there are approximately 281 IC therein. Even based on the International Technology Roadmap for Semiconductor (ITRS), is expected to be available a chip consisting of a transistor 3 billion in the year 2008.

IC used to own a variety of tools, including television, mobile phone, computer, industrial machinery, and various audio and video equipment. IC is often grouped based on the number of transistor held:

  • SSI (small-scale integration) chips with a maximum of 100 electronic components.
  • MSI (medium-scale integration) chips with 100 to 3,000 electronic components.
  • LSI (large-scale integration) chip with the 3000 to 100,000 electronic components.
  • VLSI (very large-scale integration) chips with 100,000 to 1,000,000 electronic components.
  • ULSI (ultra large-scale integration) chips with more than 1 million electronic components.