Cisco Systems, Inc. rolled out two enhancements to its Catalyst 6500 Series and 4500 Series routing switches. The new improvements are designed to better support peer-to-peer and real-time applications. They are the Cisco Catalyst 6500 Series Virtual Switching System 1440, which combines multiple Catalyst 6500 switches into one and scales system bandwidth capacity to 1.44 terabits per second; and the Cisco Catalyst 4500 E-Series with CenterFlex technology, which the company says it provides high network performance for rich applications.
"Business works differently now. Ideas come from everywhere. Negotiations and discussions come from everywhere. To keep pace, you need a different kind of network that can support apps that we haven't seen until now -- like Web 2.0 and telepresence," said Tere Bracco, senior manager of network systems at Cisco.
The Cisco Catalyst 6500 Series Virtual Switching System 1440 is enabled by the Virtual Switching Supervisor Engine 720 with 10 Gigabit Ethernet, hardware module that can make two 6500 switches behave and appear to administrators as one and costs $31,500.
The Cisco Catalyst 4500 E-Series with CenterFlex technology now delivers 320 gigabits per second and a fourfold increase in per-slot bandwidth using its unique centralized and flexible architecture. It provides 250 mpps (million packets per second) centralized performance and is based on Cisco's new CenterFlex technology which resulted in the filing of 19 new technology patents enhancing security, quality of service (QoS) and performance, the company claims.
Saturday, February 16, 2008
PowerEdge M-Series
Packet Island, Inc. today announced that they will demonstrate their latest SaaS-based sniffer product, PacketPro at TMC's ITEXPO conference in Miami. This SaaS-based product has the ability to provide managed service providers and IT outsourcing companies remote visibility to troubleshoot problems in their customers' networks. Many companies don't have the internal networking staff to troubleshoot complex networking issues, especially voice over IP, which is time sensitive traffic. I haven't seen their product demo yet, so I'll be sure to stop by their booth. I believe they leverage Ethereal/WireShark, an open-source packet sniffing software. I know their solution supports SIP, SCCP (Cisco Skinny protocol), and Asterisk as reported by TMCNet.
PacketPro is a remote VoIP Lifecycle Management and Packet Sniffing solution. It consists of a 4" x 5" micro-appliance in a portable kit that can be shipped to a customer site. Packet Island's hosted service enables this micro-appliance to be used as a remote ethereal sniffer to diagnose a broad variety of network problems.
PacketPro is a remote VoIP Lifecycle Management and Packet Sniffing solution. It consists of a 4" x 5" micro-appliance in a portable kit that can be shipped to a customer site. Packet Island's hosted service enables this micro-appliance to be used as a remote ethereal sniffer to diagnose a broad variety of network problems.
Cisco Announces New Data Center Concept with Nexus 7000
Cisco Systems Inc. will announce today a network switch for corporations, the Nexus 7000, which will allegedly provide a significant increase in traffic capacity over the company’s current products (the Catalyst series), to 15 trillion bits of data a second.
The Nexus 7000 combines Ethernet switching and storage capabilities into a single product and is designed to operate in corporate data centers. They will be powered by the NX-OS operating system, which will act as the brain of the data center. The Nexus Series of Cisco switches starts at $75,000 and will be available in the second quarter.
The Nexus project has required high research and development costs and the efforts of more than 500 engineers in the last four years, Cisco said. The new data center design proposed by Cisco will mean direct competition with server makers such as IBM and HP.
The Nexus 7000 combines Ethernet switching and storage capabilities into a single product and is designed to operate in corporate data centers. They will be powered by the NX-OS operating system, which will act as the brain of the data center. The Nexus Series of Cisco switches starts at $75,000 and will be available in the second quarter.
The Nexus project has required high research and development costs and the efforts of more than 500 engineers in the last four years, Cisco said. The new data center design proposed by Cisco will mean direct competition with server makers such as IBM and HP.
Wednesday, February 13, 2008
Difference Between Switch, Hubs and switch
Hubs and Switches serve for multiple computers together, and from the outside, they function identically they allow the connected computers to exchange data among themselves. However, the way they handle data internally is very different.
I copy this examples so that you can understand much better:
You can think of a hub like a house with 4 rooms, 4 people, and 4 phones but only one phone number. Each person has the phone to his ear, and they can converse with each other, but if one person speaks, everyone can hear it regardless if the statement was intended for them or not. So, if person 4 wanted to send a message to person 3, he would have to tell everyone to be quiet, say "this message is for person 3" and then say the message.
Figure 1 - 4 port hub.
Imagine the same situation except that each room has its own telephone number. This situation describes a switch. If person 4 wanted to send a message to person 3, he could call directly to that room without disturbing the people in rooms 1 or 2. That means that at the same time 3 and 4 are talking, room 1 and 2 could have a conversation without disrupting any other conversations.
The difference between a switch and a hub is that a switch can handle multiple communications between the computers attached to it whereas a hub handle one at a time. If there are only two computers transmitting data across a network, a hub would perform identically to a switch. However, if more than two computers were trying to transmit across the network at the same time, the switch would perform far better.
While router serves a slightly different function. A router is explicitly designed to connect two networks together, usually a Local Area Network, or LAN (like a single small office) to a Wide Area Network, or WAN (like the Internet). A router also has additional "smart" software with security features that disallow unauthorized access to the computers in the LAN from the outside.
I copy this examples so that you can understand much better:
You can think of a hub like a house with 4 rooms, 4 people, and 4 phones but only one phone number. Each person has the phone to his ear, and they can converse with each other, but if one person speaks, everyone can hear it regardless if the statement was intended for them or not. So, if person 4 wanted to send a message to person 3, he would have to tell everyone to be quiet, say "this message is for person 3" and then say the message.
Figure 1 - 4 port hub.
Imagine the same situation except that each room has its own telephone number. This situation describes a switch. If person 4 wanted to send a message to person 3, he could call directly to that room without disturbing the people in rooms 1 or 2. That means that at the same time 3 and 4 are talking, room 1 and 2 could have a conversation without disrupting any other conversations.
The difference between a switch and a hub is that a switch can handle multiple communications between the computers attached to it whereas a hub handle one at a time. If there are only two computers transmitting data across a network, a hub would perform identically to a switch. However, if more than two computers were trying to transmit across the network at the same time, the switch would perform far better.
While router serves a slightly different function. A router is explicitly designed to connect two networks together, usually a Local Area Network, or LAN (like a single small office) to a Wide Area Network, or WAN (like the Internet). A router also has additional "smart" software with security features that disallow unauthorized access to the computers in the LAN from the outside.
Tuesday, February 12, 2008
host
A host is simply a computer (or server) that has a constant, high speed connection to the Internet. The importance of this is that this will allow your website to view worldwide over the internet. There are many host that are available today that gives the developer to view its website. Free web hosting are available today so that you can post your website on the internet for free this is a service which provides users with the ability to store web sites and media on the Internet for no cost. This is so good for all those who wanted to post the website with no cash involved.
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