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D-Link XStack 48-Port Gigabit Layer 2 The xStack DGS-3450 next generation switch delivers performance, flexibility, security, multi-layer Quality of Service (QoS) and redundant power option for the SMB and enterprises. With high Gigabit port densities for desktop connections, SFP fibre connectivity, 10-Gigabit uplink options and enhanced Layer 2+ functions, this switch comprises the workgroup access-layer stack for seamless integration with L3 core switches to form part of a multilevel network structured with high-speed backbone and centralized servers. The DGS-3450 can operate as a stand-alone device or part of a scalable stack. Embedded with Single IP Management capability, a stand-alone switch can form part of a virtual stack, where intra-stack traffic flows through the usual network wires, doing away with the costly stacking cables. Without stacking cables, cable distance barriers and physical stacking limitations, a virtual stack can comprise units that are located anywhere on the network that minimizes the impact of any single point of failure. Alternatively, optional 10-Gigabit modules can be installed in the open slots to create a physical stack. Up to 12 units or 576 Gigabit ports can be configured for a stack. Users can install one or two single-port modules, depending on whether the fault-tolerant Ring or Star stacking is implemented. With each of these ports providing 20Gbps full duplex transmission on the cost-effective coaxial cable, the DGS-3450 provides not only high-bandwidth stacking but also cost control capability that allows users to add ports strictly on a per need basis. Modules with single 10-Gigabit XFP can also be installed in any of the open slots for uplink to a server or a fibre backbone. The DGS-3450 provides a complete set of security features, which includes L2/L3/L4 multi-layer Access Control Lists and 802.1x user authentication via TACACS+ and RADIUS servers. In addition, it offers suppression capabilities, Layer 3 IP v.4/v.6 Static Routing and IP v.6 tunnelling to increase network performance and security. To ensure that not only proper user access is served, but also malicious traffic within the network is prevented, the DGS-3450 includes a Health Check mechanism that provides pro-active network security without the need for manual intervention from the administrator. The DGS-3450 provides extensive VLAN support including GARP/GVRP, 802.1Q and asymmetric VLAN to enhance security and performance. To support converged applications including VoIP, ERP, Intranet and videoconference, a robust set of L2/L3/L4 QoS/CoS features ensures that critical network services are served with proper priority. With Multi-layer L2/L3/L4 bandwidth control and D-Link Safeguard Engine, the DGS-3450 can set limits to traffic flows from the edge of the network while automatically prevents broadcast packets and bulk traffic generated by Internet Dos-related activities from utilizing the switch's CPU resources. This prevention of unnecessary and harmful traffic can increase the overall network serviceability, reliability and availability of the stack.
Lexmark X642e Mono Laser All In One Specialized and general office copy, fax, scan and print is consolidated on one multifunction printer supporting labels, heavy media, recycled media and specialty forms. This MFP can be easily tailored to an array of business output application needs through the selection of input paper handling options, wireless or fiber network connections, and unique optional application solutions for PDF, bar code or encrypted data printing. A powerful 514 MHz processor and standard 128MB RAM (expandable to 640MB) for fast copying or printing with up to 45 ppm (43 ppm for A4) coupled with a time to first page as quick as 8.5 seconds means less wait-time for users. 200, 000 page one-time maximum monthly duty cycle provides departmental workgroup support. Simple Network Management Protocol (SNMP) v3, Secure Sockets Layer (SSL), IP Security (IPSec) and 802.1x authentication and user authentication (with single sign-on) provide security measures for multifunction communications and data encryption. Confidential printing with enhanced personal ID number (up to 10 digits) management including lockout, job expiration, and invalid PIN protection. Easy-to-view, adjustable Lexmark e-Task 5.7-inch (15.5 cm) touch screen provides access to print, copy, fax and scan-to-email functions. Graphical 'Show Me' assists in keeping the MFP up and running. Supports direct printing (without a PC) of PDFs and image (TIFF, JPEG) files from a USB flash drive using the convenient USB Direct interface on the operator panel. Or scan a document and save it to the USB Flash drive as a PDF, TIFF or JPEG.
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D-Link 12-Port Gigabit XStack L3 With 12 SFP slots, the DGS-3612G provides a full fibre environment for long distance Ethernet infrastructure. It is particularly suitable for ISPs in their Metropolitan Area Network (MAN) deployments. In addition, four 1000Base-T copper ports acting as combo with 4 of the SFP slots are included for flexibility. With D-Link Single IP Management (SIM) technology, up to 32 switch units -regardless of the model- may be combined in a virtual stack. Multiple switches can be configured, monitored and maintained from any workstation running a web browser via a single IP address. The stack is managed as a single object, as all stacked units are identified by this single IP address. A simple yet powerful web-based interface allows the administrator to perform most management and configuration tasks. The DGS-3612G includes advanced routing features, such as OSPF v2, Passive Interface, Not-So-Stubby Area (NSSA), Equal Cost Route and RIP. Multicast services such as IP-TV and Video on Demand (VoD) are supported with the inclusion of protocols such as IGMP, MLD and PIM. With Double VLAN (802.1Q-in-Q) support, ISPs can create Layer2 Virtual Private Networks (VPNs) and transparent LANs for their customers. A complete set of security features is provided for connectivity and access control. These include Access Control Lists (ACLs) based on MAC address, switch port, IP address and/or TCP/UDP port numbers. 802.1X Authentication and MAC address control functionality is furthermore featured. The switch also provides central management for administration access via TACACS/TACACS+ and RADIUS. In addition, when implemented in conjunction with a D-Link NetDefend firewall, this switch is able to automatically quarantine any host displaying abnormal behaviour. This mechanism, D-Link's ZoneDefense, provides proactive network security by preventing viruses from spreading through the network and thwarting harmful network attacks. The DGS-3612G switch provides VLAN support including GARP/GVRP, 802.1Q and Guest VLAN to enhance network security and performance. The Guest VLAN feature assigns the user to a "Guest VLAN" dynamically if the user does not login on the RADIUS server. If authentication is successful the user will be assigned to the VLAN that is associated with the login information. The switch implements a robust set of multi-layer (L2, L3, L4) QoS/CoS features to ensure that critical network services like VoIP, ERP, Intranet and video conference are prioritized. Bandwidth control allows administrators to set traffic limits on each port, ensuring a committed level of service for end users. For advanced applications, per-flow bandwidth control allows easy fine-tuning of service types based on specific IP addresses or protocols. In addition, a unique feature, D-Link Safeguard Engine, allows administrators to configure thresholds that limit the impact of packet flooding to the switches CPU typically caused by virus/worm outbreaks. This increases the switch's reliability, serviceability and availability.
ZyXEL Dimension GS-4024 - Switch - 24 Ports ZyXEL GS-4000 series is an intelligent Gigabit multilayer (L2/L3/L4) Ethernet switch that provides enterprise-class availability, resilient and redundant architecture with OSPF, VRRP, RSTP and port trunking. The GS-4000 series offers many advanced features to make it the preferred choice for real-routing network in the enterprise. Advanced functionalities like QoS, rate-limiting, rule-based access control lists, multicasting support, wire-speed, high-performance IP routing and simplified management software (iStacking) highly improve network operation. The GS-4024 features 20-port 100/1000BASE-T RJ-45 and four dual-personality GbE interface (RJ-45 or SFP). Based on non-blocking switching architecture, the GS-4000 series can be deployed as both an intelligent access layer switch for enterprise wiring closets and as a Layer 3 backbone switch for SMB networks.
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