Cisco Catalyst 3750 Series Switches, More Popular, Key Features

The Cisco 3750 Switches are innovative switches that improve LAN operating efficiency by combining industry-leading ease of use and high resiliency for stackable switches. And Cisco 3750 series features Cisco Stack Wisetechnology, a 32-Gbps stack interconnect that allows customers to build a unified, highly resilient switching system, one switch at a time.

For mid-sized organizations and enterprise branch offices, the Cisco Catalyst 3750 Series eases deployment of converged applications and adapts to changing business needs by providing configuration flexibility, support for converged network patterns, and automation of intelligent network-services configurations. What’s more, Catalyst 3750 Series WS-C3750G-48PS-S Switch is optimized for high-density Gigabit Ethernet deployments and includes a diverse range of switches that meet access, aggregation, or small-network backbone-connectivity requirements.

So if you are an enterprise branch office, requiring higher quality network services, Cisco 3750 will be a good choice. Need or not? Please check the following feature details:

Key Features & Benefits of Cisco 3750 Switches

Ease of Use: "Plug-and-Play" Configuration

A working stack is self-managing and self-configuring. When switches are added or removed, the master switch automatically loads the Cisco IOS Software revision running on the stack to the new switch, loads the global configuration parameters, and updates all the routing tables to reflect changes. Upgrades are applied universally and simultaneously to all members of the stack.

The Cisco 3750 Series WS-C3750G-48TS-E stacks up to nine switches as a single logical unit for a total of 468 Ethernet or PoE 10/100 ports, or 468 Ethernet 10/100/1000 ports or PoE 10/100/1000 ports, or nine 10 Gigabit Ethernet ports.

Return on Investment through Lower Operations Costs

The automatic Cisco IOS Software version checking and loading of the global configuration parameters provide the first level of operational time saving. The second level is added during the event of an outage. When you remove a troubled switch from an existing stack of switches and replace it with another switch, the master switch will recognize this as a maintenance outage and automatically reload the port-level configuration that was on the previous switch without user intervention. This allows IT managers to have local personnel in remote locations perform maintenance tasks instead of sending costly technicians out for a few minutes of work, thus saving thousands of dollars in operational costs.

Mix-and-Match Switch Types: Pay as You Expand Your Network

Stacks can be created with any combination of Cisco Catalyst 3750 and Cisco Catalyst 3750-E series WS-C3750G-48TS-S. Customers who need a mixture of 10/100 and 10/100/1000 ports, PoE, and wiring-closet aggregation capability can incrementally develop the access environment, paying only for what they need. When uplink capacity needs to be increased, you can easily upgrade your bandwidth by adding a 10 Gigabit Ethernet version to the stack and upgrade your Gigabit Ethernet links with 10 Gigabit Ethernet on the existing fiber.

Availability: Uninterrupted Performance at Layer 2 and Layer 3

The Cisco Catalyst 3750 switch increases availability for stackable switches. Each switch can operate as both a master controller and a forwarding processor. Each switch in the stack can serve as a master, creating a 1:N availability scheme for network control. In the unlikely event of a single unit failure, all other units continue to forward traffic and maintain operation.

Smart Multicast: A New Level of Efficiency for Converged Networks

With Cisco StackWise technology, the Cisco Catalyst 3750 Series offers greater efficiency for multicast applications such as video. Each data packet is put onto the backplane only once, which provides more effective support for more data streams.

Superior Quality of Service Across the Stack and at Wire Speed

The Cisco3750 Series offers Gigabit and 10 Gigabit Ethernet speed with intelligent services that keep everything flowing smoothly, even at 10 times the normal network speed. Mechanisms for marking, classification, and scheduling deliver best-in-class performance for data, voice, and video traffic, all at wire speed.

Network Security: Granular Control for the Access Environment

The Cisco 3750 supports a comprehensive set of security features for connectivity and access control, including ACLs, authentication, port-level security, and identity-based network services with 802.1x and extensions. This set of comprehensive features not only helps prevent external attacks, but also defends the network against "man-in-the-middle" attacks, a primary concern in today's business environment.

Single IP Management: Many Switches, One Address

Each Cisco Catalyst 3750 Series stack is managed as a single object and has a single IP address. Single IP management is supported for activities such as fault detection, VLAN creation and modification, network security, and QoS controls.

cisco 3750 switch

Jumbo Frames: Support for High-Demand Applications

The Cisco3750 Series Switch supports jumbo frames on the 10/100/1000 configurations for advanced data and video applications requiring very large frames.

IPv6 Support

TheCatalyst 3750 Series supports IPv6 routing in hardware for maximum performance. As network devices grow and the need for larger addressing and higher security becomes critical, the Cisco 3750 switch will be ready to meet the requirement.

Standard PoE Support: Graceful Addition of IP Communications

The Cisco Catalyst 3750 and 3750G PoE models support Cisco IP phones and Cisco Aironet wireless LAN (WLAN) access points, as well as any IEEE 802.3af-compliant end device. The Cisco Catalyst 3750 and 3750G 24-port versions can support 24 simultaneous full-powered PoE ports at 15.4W for maximum powered device support. The 48-port versions can deliver the necessary power to support 24 ports at 15.4W, 48 ports at 7.7W, or any combination in between.

10 Gigabit Ethernet Support: Increased Uplink Bandwidth for Gigabit Ethernet Deployments

The Cisco Catalyst 3750allows network managers to incrementally add IEEE 802.3ae-compliant 10 Gigabit Ethernet connectivity in their wiring closets or grid clusters, further facilitating and enhancing Gigabit Ethernet networks. This provides investment protection to customers who want to use their existing fiber plant, add uplink bandwidth capacity to their switching stacks, and provide higher performance to applications and users.

Management Options

The Cisco 3750 Series switch offers both a superior command-line interface (CLI) for detailed configuration and Cisco Network Assistant Software, a Web-based tool for quick configuration based on preset templates. In addition, CiscoWorks supports the Cisco Catalyst 3750 Series for network wide management.

Models Comparison of Cisco 3750 Series Switches

Report from Cisco market and customers told us that Cisco Catalyst 3750G and Cisco 3750 V2 series are more welcomed than Cisco 3570-E series.

Now, here, we list some popular items of Cisco 3750 switches for you to refer to…

WS-C3750G-24TS-S1U:Device Type: Switch - 24 ports - L3 - Managed - stackable

Enclosure Type: Rack-mountable - 1U

Ports: 24 x 10/100/1000 + 4 x SFP

MAC Address Table Size: 12K entries

WS-C3750G-24PS-S:Device Type: Switch - 24 ports - L3 - Managed - stackable

Enclosure Type: Rack-mountable - 1U

Ports: 24 x 10/100 + 2 x SFP

Power over Ethernet (PoE): Yes

WS-C3750G-48PS-S:Device Type: Switch - 48 ports - L3 - Managed - stackable

Enclosure Type: Rack-mountable - 1U

Ports: 48 x 10/100/1000 + 4 x SFP

Power over Ethernet (PoE): Yes

WS-C3750V2-24PS-S:Device Type: Switch - 24 ports - L3 - Managed - stackable

Enclosure Type: Rack-mountable - 1U

Ports: 24 x 10/100 + 2 x SFP

Power over Ethernet (PoE): Yes

WS-C3750V2-48PS-S:Device Type: Switch - 48 ports - L3 - Managed

Enclosure Type: Rack-mountable - 1U

Ports: 48 x 10/100 + 4 x SFP

Power over Ethernet (PoE): Yes

Notes:More types and price of Cisco 3750 series switches you can visit Cisco switches at router-switch.com.

Cisco ASA 5500 Series, Best Guard for Business’ Security

Cisco ASA 5500 series, especially Cisco ASA 5540-BUN-K9, which can help businesses increase effectiveness and efficiency in protecting their networks and applications while delivering exceptional investment protection throughmarket-proven security capabilities, extensible integrated services architecture, reduced deployment and operations costs and comprehensive management interfaces.

The Cisco pix firewalls ASA 5500 Series includes the Cisco ASA 5505, 5510, 5520, 5540, 5550, 5580, and 5585-X Adaptive Security Appliances-purpose-built, high-performance security solutions that take advantage of Cisco's expertise in developing industry-leading, award-winning security and VPN solutions.

Through the Cisco MPF, the Cisco ASA 5500 Series brings a new level of security and policy control to applications and networks. IPS 4200 Series Sensor

Let’s check one of Cisco ASA 5500 Series: Cisco ASA 5540-BUN-K9, better choice for your business’ network.

Product Details
Device Type	Security appliance
Enclosure Type	Rack-mountable - 1U
Dimensions (WxDxH)	44.5 cm x 33.5 cm x 4.4 cm
Weight	9.1 kg
RAM Installed ( Max )	1 GB
Flash Memory Installed (Max)	64 MB Flash
Data Link Protocol	Ethernet, Fast Ethernet, Gigabit Ethernet
Network / Transport Protocol	IPSec
Performance	Firewall throughput : 650 Mbps ¦ VPN throughput : 325 Mbps ¦ Connection rate : 25000 connections per second
Capacity	Concurrent sessions : 400000 ¦ IPSec VPN peers : 5000 ¦ SSL VPN peers : 2 ¦ Virtual interfaces (VLANs) : 200
Features	Firewall protection, VPN support, load balancing, VLAN support, High Availability
Power	AC 120/230 V ( 50/60 Hz )

The Cisco ASA 5540 Adaptive Security Appliance scales with businesses as their network security requirements grow, delivering exceptional investment protection and services scalability. Email and Web Security The advanced network and application layer security services and anti-x defenses provided by the Cisco ASA 5540 Adaptive Security Appliance can be extended by deploying a high performance Security Services Module. (more details you can see Cisco ASA 5500 Series at Cisco.com)

Purchasing info…

Manufacturer: Cisco

Part Code: ASA5540-BUN-K9

Features: Firewall protection, VPN support, load balancing, VLAN support, High Availability  Cisco ASA 5500 Licenses

Data Link Protocol: Ethernet, Fast Ethernet, Gigabit Ethernet

Device Type: Security appliance

Enclosure Type: Rack-mountable - 1U

List price: US$16,995.00

Wholesale Price: US$7,648.00

You Save:  US$9,347.00 (55.00% OFF)

Tel: +852-3755-6766 (Hong Kong)

Fax: +852-3050-1066 (Hong Kong)

MSN: cisco@router-switch.com.

Email: cisco@router-switch.com (Sales Inquiries)/ webmaster@router-switch.com (Technical Inquiries)

Tips: Cisco embeds network firewall security throughout the network and integrates security services in all its products. As a result, network firewall security becomes a transparent, scalable, and manageable aspect of the business infrastructure.

Routers and Its Role in a Network

The Internet is formed by networks throughout the world interconnecting and passing on data to each other. cisco router make the Internet work by forwarding data using a unified addressing system. They can send information to anywhere in the world as long as that location has an IP address.

Description

Routers vary inside to large expensive machines for commercial applications to small wireless boxes for the home electronics market. A router combines dedicated hardware and specialist software to achieve its task. To be effective, a cisco routers needs to be connected to at least two separate networks because its main task is to forward data from one network to another.

Operation

Routers rely on the Internet Protocol to provide a common addressing system. The protocol defines an address structure which is universally implemented and is enforced by one controlling authority in each country. The IP address of any computer contactable over the Internet has to be unique. The computer sending information over the Internet has to package that data into a packet. The data packet contains a header which includes the IP address of the destination computer. Used routers read this address and then forward the packet in the direction of its destination.

Routing Tables

A router prepares for its work by compiling a list of possible routes to a particular destination. The format of the table does not require that every IP address is listed. They can be noted in groups. When a router is first installed it contacts its neighboring routers. These are the routers to which it is immediately connected. Each of these neighbors send their routing tables to the used cisco routers which then compiles its own routing table. Routers regularly exchange their routing tables and so information about routes held on one router eventually ripples through to all routers in the world.

Algorithm

The routing table contains several different paths to the same destination. The router uses an algorithm to rank these alternatives. There are many different routing algorithms in the world, but they generally all rely on the direction and the distance travelled to reach the target. The distance is often recorded as the number of links the cisco router used crosses. The direction tells the router which of its immediate neighbors starts that route.

Function

Although the routing table contains alternative routes it does not list the routers in the path of that route, only the first router in the chain. The next router receiving the data packet then makes a calculation to decide which of its neighbors will receive the packet next, and so on. This distributed decision making allows used routes to be switched in case of broken connections further down the line of which the originating router is unaware.

Advantages & Disadvantages of IP Phones

Voice over Internet Protocol, commonly known as VOIP, allows users to establish voice connections over the Internet, much like traditional telephone services that traverse dedicated copper wires. While a growing number of users continue to adopt the technology, the relatively new protocol has a number of disadvantages that counter its benefits.

Advantage

1.       Cost

A primary benefit of Cisco Ip Phone, and a benefit often referenced by IP telephone service providers such as Vonage and Magic Jack, is the reduction of cost for IP telephone customers. Traditional, circuit-based telephone companies have invested billions of dollars over several decades to build out their infrastructure and provide expensive resources dedicated to maintaining voice communications. Because VOIP technology relies on the Internet, rather than an expensive dedicated network, Cisco Phone service providers can charge considerably lower prices than their traditional counterparts.

2.       Mobility

With the introduction of modular plugs in the 1980s, traditional telephones began to allow users to move the devices from place to place with relative ease. If the user moved the phone to a different location, though, the telephone would operate with a different telephone number and, depending on the service provider, cp-7945g enable different features. IP phones, by contrast and according to IP product vendor Cisco, register with a central server regardless of their physical location. For this reason, a user can move an IP phone from location to location, state to state or even to another country while still keeping the same telephone number and set of features.

3.       Features

Traditional telephone services allow basic features such as call waiting, conference calling, and voicemail and caller identification. According to the Federal Communications Commission (FCC), IP phones typically enable all of these features and a number of others not available in the traditional telephone network. 7945g IP phones, for example, can allow a user to place a call on hold and pick it up from anywhere else with an Internet connection, transfer a call to a telephone on another network, ring incoming calls to several telephones on different networks at the same time and even deliver voicemail messages via e-mail. The specific features offered supported by IP phones vary from phone to phone, cp-7945g= and many may require support from the VOIP service provider.

Disadvantage:

1.       Quality of Service

While the Internet-based routing of IP phone calls enables cheap, mobile service, it also moves voice traffic off a dedicated network and onto an ever-changing digital landscape. In the absence of a dedicated set of voice circuits, IP phones typically, according to Cisco, convert voice sounds into data packages, address them to the VOIP switch and send them out across the Internet with no guarantee that they will arrive at their destination. Despite numerous quality of service (QoS) measures implemented by IP phone vendors, used phones VOIP users may occasionally experience a delay in the conversation (latency), poor or robotlike sound quality (jitter) or miss portions of the conversation (packet loss).

2.       Internet Requirement

Despite their high mobility, cisco ip phone price must have access to the Internet to work. Because IP phones rely on the ability to connect to the Internet and send data packets, according to Cisco, users must subscribe to a broadband Internet service to use the devices. According to the FCC, this requirement may represent an additional expense to users who do not already subscribe to an Internet connection.

3.       Electricity

Traditional telephones require a small amount of electricity to operate, according to service provider CenturyLink, used cisco ip phone but they pull that electricity from a special line card in the telephone company central office. As a result, customers can still use a traditional telephone during a power outage. IP phones, according to the FCC, must draw commercial power to perform their functions and may leave customers without telephone service during a power interruption.

What’s a Router? How does It Work?

Generally, most people are familiar with internet, but have no general idea about router. As a matter of fact, router is related to internet, and vital to net. So what is a used routers, and how it works? Let’s have a look.

Router, a network device that does what it sounds like - it 'routes' data.Routers are devices that allow computers to talk to or connect with other computers as well as other computer hardware.In a simple way, a router can connect a computer to more than one other computer. No matter what type of used cisco routers you have, how it works is what router users concerned. Firstly, look at the following figure, it directly display the relationship between computers and router.

Guide for you to connect a router to computers

1.       Ensure that both computers have a LAN (or an Ethernet) card allowing the sharing of files and peripherals. cisco routers used Though all new computers and laptops are equipped with such cards, you may need to buy and attach LAN cards for older models.(A network card is a devised either installed inside a desktop computer or a card that slides into a laptop. A router is the piece that will allow you to receive wireless internetand networking from the devise with the network card installed.)

2.       Connect the cable from your Internet Service Provider (ISP) to the Internet port of your used routers. Note that if you have an ADSL connection, your input cable would be a telephone line that needs to be inserted into the ADSL port of the router. For all other connections, you would have a thicker cable known as CAT5 (or CAT6).

3.       Take two Ethernet cables and plug them into the Ethernet ports of the router. Note that you will require a router with at least two Ethernet ports to share Internet on two computers. Plug the other end of each of the cables into the Ethernet port of the computers. If you have a router with a single Ethernet port, buy a switch or hub and connect the used router with it (using the Ethernet cable). In turn, the switch (or hub) that includes at least two Ethernet ports will have to be connected to the computers.(More info of switch, hub and router you can visit “Identifying What is Router, Switch and Hub”)

http://ciscorouterswitch.over-blog.com/article-identifying-what-is-router-switch-and-hub-76970053.html

4.       Switch on the router and the computers.

5.       Configure the router by referring to its user manual. The configuration process defers depending on the type and brand of the buy cisco router.Once configured, you should be able to access Internet on both computers.

More related to router

The router is hooked up between the cable modem and your computer/s.

The router assigns LAN (local area network) IP's to each computer to make it simpler to network.

Buy cisco routers helps block port access into your computer and is a better defense against hackers then a software firewall such as Norton Internet Security or other software firewalls someone might install on their system.

A router is very easy to set up if you read the instruction manual that comes with it.

Cisco 3750X, a Top Cisco Item of Cisco Catalyst 3750 Series

Cisco WS-C3750G-48TS-S, a hot Cisco switch, is welcomed by Cisco users such as small, medium and large business or enterprises. As a member of switch cisco 3750 Series, WS-C3750G-48TS-S is an innovative product line that improves LAN operating efficiency by combining industry-leading ease of use and the highest resiliency available for stackable switches. It features Cisco StackWise technology, a 32-Gbps stack interconnect that allows customers to build a unified, highly resilient switching system - one switch at a time. And buy cisco switch StackWise technology is designed to respond to network changes of all kinds while maintaining constant high network performance by using a 32-Gbps stack interconnects.

As for WS-C3750G-48TS-S, the following list of key features can help you know that whether it can fit for your office:

Device Type Switch - 48 ports - L3 - Managed - stackable

Enclosure TypeRack-mountable - 1U cisco 3750 price

Ports48 x 10/100/1000 + 4 x SFP

PerformanceSwitching capacity : 32 Gbps ¦ Forwarding performance : 38.7 mpps

MAC Address Table Size12K entries

Jumbo Frame SupportYes

Routing ProtocolRIP-1, RIP-2, HSRP, static IP routing, RIPng

Remote Management ProtocolSNMP 1, RMON 1, RMON 2, RMON 3, RMON 9, Telnet, SNMP 3, SNMP 2c, SSH, CLI

FeaturesFlow control, full duplex capability, Layer 3 switching, auto-sensing per device, IP-routing, DHCP support, auto-negotiation, ARP support, VLAN support, auto-uplink (auto MDI/MDI-X), IGMP snooping, traffic shaping, stackable, Spanning Tree Protocol (STP) support, 3750 switch price Rapid Spanning Tree Protocol (RSTP) support, Multiple Spanning Tree Protocol (MSTP) support, Dynamic Trunking Protocol (DTP) support, Port Aggregation Protocol (PAgP) support, Trivial File Transfer Protocol (TFTP) support, Access Control List (ACL) support, Quality of Service (QoS), RADIUS support, Jumbo Frames support, Cisco StackWise Technology, Cisco EnergyWise technology, Uni-Directional Link Detection (UDLD), Rapid Per-VLAN Spanning Tree Plus (PVRST+), cisco 3750G switch Link Aggregation Control Protocol (LACP), Remote Switch Port Analyzer (RSPAN)

Compliant StandardsIEEE 802.3, IEEE 802.3u, IEEE 802.3z, IEEE 802.1D, IEEE 802.1Q, IEEE 802.3ab, IEEE 802.1p, IEEE 802.3x, IEEE 802.3ad (LACP), IEEE 802.1w, IEEE 802.1x, IEEE 802.3ae, IEEE 802.1s

Power AC 120/230 V ( 50/60 Hz )

RAM128 MB

Flash Memory32 MB Flash

Status IndicatorsLink activity, port transmission speed, port duplex mode, bandwidth utilization %, system, RPS (Redundant Power Supply)

Interfaces  48 x 10Base-T/100Base-TX/1000Base-T - RJ-45 ¦ 1 x console - RJ-45 - management ¦ Network stack device : 1 x x 2 ¦ 4 x SFP (mini-GBIC)

Power DevicePower supply - internal  cisco 3750E switch

Voltage RequiredAC 120/230 V ( 50/60 Hz )

Power Consumption Operational  160 Watt

Features Redundant Power System (RPS) connector

Dimensions (WxDxH)44.5 cm x 40.9 cm x 4.4 cm

Weight 6.4 kg

Manufacturer WarrantyLimited lifetime warranty

Price info of Cisco WS-C3750G-48TS-S

Product detail: Cisco Catalyst switch 3750 48 10/100/1000T + 4 SFP + IPB Image Conditions: New Sealed cisco 3750X switch

List Price: US$13,995.00

Wholesale Price: US$  €6,298.00

You Save: US$7,697.00 (55.00% OFF)

Supplier:YejianTechnology(router-switch.com)

Cisco 3945 Hot Required Models of Cisco 3900 Series

The buy cisco 3900 series, designed to power the next phase of branch-office evolution, builds on the best-in-class offering of the existing Cisco 3800 Series Integrated Services Routers by now offering four platforms: the Cisco 3945E, Cisco 3925E , and C3945-WAAS-SEC/K9 Integrated Services Routers.

Cisco 3900 router offers embedded hardware encryption acceleration, voice- and video-capable DSP slots, optional firewall, intrusion prevention, call processing, voicemail, and application services. C3945-VSEC-SRE/K9 In addition, the platforms support the industry's widest range of wired and wireless connectivity options such as T1/E1, T3/E3, xDSL, copper, and fiber Gigabit Ethernet.

And the CISCO3925E-SEC/K9 also offers superior performance and flexibility for flexible network deployments from small business offices to large enterprise offices-all while providing industry-leading investment protection.

The CiscoISR G2 routers provide superior services integration and agility. Designed for scalability, the modular architecture of these platforms enables users to evolve and adapt with your growing business needs. Business benefits of the Cisco 3900 Series router are listed as follows:

Services On-Demand: The  CISCO3925E-V/K9 router reduces initial capital outlays by decoupling the delivery of software from hardware on optional service modules. In addition, you receive a Universal IOS image capable of enabling all of Cisco's rich IOS features and allowing you to quickly deploy new services.

Investment Protection: The Cisco 3900 Series reduces deployment costs and increases flexibility. The platform offers a modular, field upgradable motherboard called the Services Performance Engine (SPE). SPEs allow you to invest in a 3900 Series ISR today and boost its performance later by upgrading to a higher-performance engine. Investment protection is also offered with support for a majority of existing modules from previous-generation ISRs.

Energy Efficiency: The Cisco 3900 architecture includes higher-efficiency power supplies with intelligent power management, with full Cisco EnergyWise feature support in the future. Both ISR 3925 and  CISCO3945E-SEC/K9 routers support dual power supplies for power supply redundancy for branch or retail environments running mission-critical applications.

High Performance: The Cisco 3900 Series router offers significant performance improvements over previous-generation ISRs. CISCO3945E-V/K9

Cisco 3900 with Cisco IOS Software Feature and Protocol High-Level Support

Protocols• IPv4, IPv6, static routes, Open Shortest Path First (OSPF), Enhanced IGRP (EIGRP), Border Gateway Protocol (BGP), BGP Router Reflector, Intermediate System-to-Intermediate System (IS-IS), Multicast Internet Group Management Protocol (IGMPv3), Protocol Independent Multicast sparse mode (PIM SM), PIM Source Specific Multicast (SSM), Distance Vector Multicast Routing Protocol (DVMRP), IPv4-to-IPv6 Multicast, MPLS, Layer 2 and Layer 3 VPN, IPSec, Layer 2 Tunneling Protocol Version 3 (L2TPv3), , Bidirectional Forwarding Detection (BFD), IEEE802.1ag, and IEEE802.3ah

Encapsulations• Generic routing encapsulation (GRE), Ethernet, 802.1q VLAN, Point-to-Point Protocol (PPP), Multilink Point-to-Point Protocol (MLPPP), Frame Relay, Multilink Frame Relay (MLFR) (FR.15 and FR.16), High-Level Data Link Control (HDLC), Serial (RS-232, RS-449, X.21, V.35, and EIA-530), PPP over Ethernet (PPPoE), and ATM

Traffic management• QoS, Class-Based Weighted Fair Queuing (CBWFQ), Weighted Random Early Detection (WRED), Hierarchical QoS, Policy-Based Routing (PBR), Performance Routing, and NBAR

All in all, the cisco3925/k9 Series offers unparalleled total cost of ownership savings and network agility through the intelligent integration of security, wireless, and application services. If you want more info about Cisco 3900 router, you can visit Cisco’s official site.

Notes: Cisco 3900 Routers’ Models

Product Name	Product Description
CISCO3925/K9	cisco3925 with 3 onboard GE, C3900-SPE100/K9, 4 EHWIC slots, 4 DSP slots, 1 ISM slot, 2 SM slots, 256MB CF default ,1 GB DRAM default ,IP Base
CISCO3945/K9	Cisco 3945 with 3 onboard GE, C3900-SPE150/K9, 4 EHWIC slots, 4 DSP slots, 1 ISM slot, 4 SM slots, 256MB CF default ,1 GB DRAM default ,IP Base
CISCO3925E/K9	Cisco 3925 with 4 onboard GE, C3900-SPE200/K9, 3 EHWIC slots, 3DSP slots, 2 SM slots, 256MB CF default ,1 GB DRAM default ,IP Base
CISCO3945E/K9	Cisco 3945 with 4 onboard GE, C3900-SPE250/K9, 3 EHWIC slots, 3 DSP slots, 4 SM slots, 256MB CF default ,1 GB DRAM default ,IP Base

More price and sales details of Cisco 3900 series router offered at routerswitch.com.

Cisco 3900Series Comparison

http://www.cisco.com/en/US/products/ps10536/prod_series_comparison.html