Difference Between Category 6 cable & Category 5e cable

Feb 27, 2009

  • Category-6 cable, commonly referred to as Cat-6, is a cable standard for Gigabit Ethernet and other network protocols that is backward compatible with the Category 5/5e and Category 3 cable standards.
  • Cat-6 give good control over crosstalk and system noise.
  • Cat-6 cable standard provides performance of up to 250 MHz and is suitable for 10BASE-T / 100BASE-TX and 1000BASE-T (Gigabit Ethernet)
  • Cat-6 is normally terminated in 8P8C modular connectors, often incorrectly referred to as “RJ-45″ electrical connectors.
  • CAT-6 cable contains four pairs of copper wire and unlike CAT5, utilizes all four pairs.
  • Cat-6 can support 10 Gbit/s applications (especially 10GBaseT) up to a maximum distance of 100 meters.
  • Twisted pair cable like CAT6 comes in two main varieties, solid and stranded. Solid CAT6 cable supports longer runs and works best in fixed wiring configurations like office buildings. Stranded CAT6 cable, on the other hand, is more pliable and better suited for shorter-distance, movable cabling such as “patch” cables.
  • Cat-5e cable is an enhanced version of Cat 5 that adds specifications for far end crosstalk.
  • Cat-5e cables are still limited to a maximum of 100 m (328 ft) in length (normal practice is to limit fixed (”horizontal”) cables to 90 m to allow for up to 5 m of patch cable at each end, this comes to a total of the previous mentioned 100m maximum).
  • Although CAT5 cable usually contains four pairs of copper wire, Fast Ethernet communications only utilize two pairs. A newer specification for CAT5 cable - CAT5 enhanced (CAT5e) - supports networking at Gigabit Ethernet[ speeds (up to 1000 Mbps) over short distances by utilizing all four wire pairs, and it is backward compatible with ordinary CAT5.
READ MORE - Difference Between Category 6 cable & Category 5e cable

Learn about Different Virtualization Approaches

A key benefit of virtualization is the ability to run multiple operating systems on a single physical system and share the underlying hardware resources known as partitioning.

  • Hardware-level virtualization,
  • Operating systemlevel virtualization,
  • and high-level language virtual machines.

For Unix/RISC and industry-standard x86 systems, the two approaches typically used with software-based partitioning are hosted and hypervisor architectures .

A hosted approach provides partitioning services on top of a standard operating system and supports the broadest range of hardware configurations.

In contrast, a hypervisor architecture is the first layer of software installed on a clean x86-based system (hence it is often referred to as a “bare metal” approach). Since it has direct access to the hardware resources, a hypervisor is more efficient than hosted architectures, enabling greater scalability,robustness and performance.

READ MORE - Learn about Different Virtualization Approaches

Microsoft made 36 changes to Windows 7

Among the changes highlighted were

  • 10 affecting the Window 7 desktop,
  • four to the operating system’s new touch-sensitive features,
  • another four to the Control Panel
  • and eight to Windows Media Player.
READ MORE - Microsoft made 36 changes to Windows 7

New Cisco Catalyst 2960 Switches Features

The Cisco Catalyst 2960 LAN Base Series offers:

  • PoE configurations up to 48 ports
  • Intelligent features at the network edge, such as sophisticated access control lists (ACLs) and enhanced security
  • Networked Sustainability: Cisco EnergyWise to measure, report and reduce energy usage across the entire organization
  • Dual-purpose uplinks for Gigabit Ethernet uplink flexibility, allowing use of either a copper or a fiber uplink; each dual-purpose uplink port has one 10/100/1000 Ethernet port and one Small Form-Factor Pluggable (SFP)-based Gigabit Ethernet port, with one port active at a time
  • Network control and bandwidth optimization using advanced QoS, granular rate limiting, ACLs, and multicast services
  • Network security through a wide range of authentication methods, data encryption technologies, and NAC based on users, ports, and MAC addresses
  • Easy network configuration, upgrades, and troubleshooting using Cisco Network Assistant software
  • Autoconfiguration for specialized applications using Auto Smartports
  • Limited lifetime hardware warranty
  • Software updates at no additional charge

2960

READ MORE - New Cisco Catalyst 2960 Switches Features

AMD at a Glance

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CEO: Dirk Meyer
Revenue: $6.013 billion in 2007
NYSE ticker symbol: AMD
Year Company Started: 1969
Number of Employees: approximately 16,500
Headquarters: Sunnyvale, California

Number of Office Locations: 80

READ MORE - AMD at a Glance

AMD Phenom™ X3 Triple-Core Processors

| AMD


Ready for a performance boost over single and dual-core processors? AMD Phenom™ X3 triple-core processors offer three processing cores on a single chip, plus cutting-edge features and capabilities for next-generation applications.
FOR BUSINESS
AMD Phenom™ X3 Triple-Core Processors
True multi-core performance for the way businesses multi-task today, and for the next-generation applications employees will need in the near future. Stable commercial AMD Phenom™X3 8000 Series processors offer industry-leading platform stability and longevity, investment protection, and the exceptional performance you expect from AMD. Plus, unique features for energy efficiency.
Learn More
FOR HOME
AMD Phenom™ X3 Triple-Core Processors
Do more than dual-core. AMD Phenom™ X3 8000 Series processors offer outstanding performance on a balanced suite of applications, as compared to AMD Athlon™X2 dual-core processors. Get added performance for multitasking, HD entertainment, content creation, and gaming applications.
READ MORE - AMD Phenom™ X3 Triple-Core Processors

New AMD Quad-Cores Start Shipping Early


In a surprising move, online vendors have begun to offer AMD’s latest quad-core processors a while before they have been actually displayed to the public. The new processors on offer are the quad-core Phenol II chips, designed to run at at speeds from 2.8GHz to 3GHz and come with 8MB of cache.


Among these the Phenom II X4 920 runs at 2.8GHz and is being retailed for between $271 and $317 USD while the Phenom II X4 940 which runs at 3GHz is being sold for anything between $304 and $373 USD, depending on the online store. They run on DDR2 platforms and will be moved to DDR3 platforms based on the AM3 sockets, later this year.

This move comes as a big surprise, because AMD has not yet introduced these processors. Their launch is earmarked for CES 09, which will be held in January '09.


READ MORE - New AMD Quad-Cores Start Shipping Early

AMD's 45nm Push


AMD recently announced that the company is shedding its manufacturing operation, transferring its manufacturing assets to a new company. This will allow AMD to focus on design and engineering.

A large part of that design effort is a move to the 45nm manufacturing process. AMD's CPUs have been hobbled by the company's reliance on the older 65nm process, which has forced the company to stay out of the high-end, high-margin segment of the processor business. To its credit, AMD has focused on lowering power consumption, offering a complete line of 45W dual-core and 65W quad-core CPUs.

By late 2008, the company will have begun shipping its first set of 45nm quad-core CPUs based on the Phenom architecture. Code-named Shanghai, the new CPU will offer 6MB of L3 cache (up from 2MB) and HyperTransport 3 support. However, Shanghai will still have an embedded DDR2 memory controller, meaning that it will trail Intel in overall memory bandwidth.

Beyond this year, the company is prepping a 6-core CPU dubbed Istanbul, which is slated for a late 2009 launch. It's unlikely that there will be substantial changes to the architecture. The next new architecture for AMD is Magny Cours, which will have up to 12 cores and finally incorporate a DDR3 memory controller. A 6-core version, code-named Sao Paulo, will arrive on the scene about the same time, in early 2010.

Intel, on the other hand, likes to brag about its "tick-tock" development cycle. The phrase refers to the way Intel designs and transitions new architectures. When Intel develops a manufacturing process—such as its current 45nm technology—it brings an existing architecture to the new process. So Penryn, Intel's first 45nm CPU, was an evolutionary improvement over the original Core 2. That's the "tick." The "tock" is when Intel designs and builds a new CPU architecture on the current manufacturing process. Hence all the Nehalem variants will be built using the existing 45nm process.

In 2009, Intel will start to bring up its next-generation 32nm process, enabling it to pack even more transistors onto the same die size or shrink the CPU considerably. The 32nm process should also reduce power consumption and, in theory, enable higher clock speeds. The first processor built on 32nm will be Westmere and will be based on Nehalem.

Westmere may incorporate up to six cores on a single die. Intel has also announced that six new instructions designed to accelerate AES encryption/decryption algorithms will be part of the instruction set.

The true next generation for Intel isn't likely to hit the street until later in 2009 and will also be built on 32nm. That CPU is code-named Sandy Bridge. There's not a lot known about Sandy Bridge yet, but Intel is planning on integrating Advanced Vector Extensions, a new set of extensions to SSE that may considerably enhance the CPU's floating-point performance

READ MORE - AMD's 45nm Push

 
 
 
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