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Iris Dan's articles
Layer 2 and Layer 3 terms come from the OSI seven Layer model (a theoretical way of dividing network architecture up with functionality, service, dependence and application). Within the model, Layer 2 represents the “Data Link Layer” while Layer 3 represents the “Network Layer”.
Posted: 2012-05-18
Category: Networks
Cisco was one of the first to sell commercially successful routers supporting multiple network protocols. Classical, CPU-based architecture of early Cisco devices coupled with flexibility of operating system IOS allowed for keeping up with evolving technology needs by means of frequent software upgrades.
Posted: 2012-05-15
Category: Networks
Restore a corrupt Cisco 3750 IOS or Internetwork Operating System image by transferring a new image to flash storage using the Xmodem protocol. Power anomalies such as brown outs and surges can cause irreparable IOS image corruption. More details...
Posted: 2012-05-03
Category: Networks
A network switch is a telecommunication device which receives a message from any device connected to it and then transmits the message only to that device for which the message was meant. This makes the switch a more intelligent device than hub (which receives a message and then transmits it all the other devices on its network).
Posted: 2012-04-16
Category: Networks
Cisco Unified IP Phones offer the high-quality, reliable communications your business needs every day. They also add new capabilities that increase your ability to collaborate within the workplace.
Posted: 2012-04-03
Category: Networks
Network switches play an integral role in computer networks by connecting all the devices on the network, enabling communication. Switches can be simple or complex, ranging from small, four-port home office devices with limited management interfaces to complex, 48 port-enterprise level devices with dedicated memory, processors and operating systems. More details...
Posted: 2012-03-19
Category: Networks
The Cisco ASA 5505 is suitable for security and budget conscious non-profit organizations or companies that really need the dependable and reliable services of a commanding and manageable performance of a firewall that can amazingly control its access to delicate and sensitive information.
Posted: 2012-03-08
Category: Networks
Cisco’ High-Performance WAN Edge Router, incorporates IOS XE, a virtualized version of Cisco's Internetwork Operating System that enables "instant on" service provisioning for features such as firewall, quality of service, deep packet inspection and session border control, said Jonathan Davidson, director of product management for midrange routers.
Posted: 2012-03-02
Category: Networks
The Cisco 2800 Series comprises four platforms: Cisco 2801, Cisco 2811, Cisco 2821, and Cisco 2851. Cisco 2801 and Cisco 2811 are one rack unit in height and have two 10/100 LAN ports. The more powerful Cisco 2821 routers and Cisco 2851 routers are two rack units in height and have two 10/100/1000 LAN ports.
Posted: 2012-01-17
Category: Networks
Cisco 7600 series can be used in Data Centers, in Service Provider networks, in WAN aggregation or as Internet Edge router. In Service Providers can be used as Provider Edge (PE) in IP MPLS networks aggregating many Customer Edge (CE) router devices. Its modularity and high port capacity allows Cisco 7600 to work as both Layer2 aggregation and as Layer3 high performance router.
Posted: 2012-01-10
Category: Networks
Most networking routers and switches have a console port that you can use to gain access to the operating system. This port is commonly used to configure other ways to access the component, such as by enabling the Ethernet port and defining an IP Address. The console port can also be used for troubleshooting.
Posted: 2011-12-29
Category: Networks
Applications such an IP video and audio tend to utilize large amounts of network bandwidth unless multicast "one to many" technology is employed. However, to reap the benefits of multicast, you must enable a minimal set of network protocols on the network switches. More about how to enable multicast support Cisco switches...
Posted: 2011-11-09
Category: Networks
Cisco firewall security, including Cisco ASA 5500 series, controls network access at the WAN edge or within the LAN, helps control application traffic, adds firewall functions at the network perimeter to protect network services and so on.
Posted: 2011-11-01
Category: Networks
Enabling port security and MAC sticky ports is an easy way to add some security to your network. It associates a device (PC, printer, etc.) with a port on the switch. More details...
Posted: 2011-10-25
Category: Networks
Cisco 3925 router is part of a family of networking equipment produced by Cisco, which has been a network equipment giant for many years.How to recover or reset password on Cisco 3925 router, tips and steps here...
Posted: 2011-10-12
Category: Networks
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