layer 2 Resources

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ZDNet Dictionary Definition

Layer 2: In networking, the communications protocol that contains the physical address of a client or server station. It is called the "data link layer" or "MAC layer" and contains the...; Full Layer 2 Definition >>

ZDNet Resources

Cisco Catalyst 6500 Supervisor Engine 32 Architecture: The Cisco Catalyst 6500 Supervisor Engine 32 is the latest addition to the Cisco Catalyst 6500 Family of supervisor modules. Designed primarily for access layer deployments, the Supervisor Engine 32 provides Layer 2 bridging and Layer 2 through 4 services with Layer 3 routing optional hardware-accelerated services. It provides connectivity...; Tags: Cisco Catalyst, Layer 2, Supervisor, Cisco Systems Inc., Cisco Catalyst 6500 Supervisor Engine 32, Workforce Management, Human Resources; White papers 2007-12-01
PLDT, the Leading Telecommunications Provider in the Philippines, Selects Allied Telesis Advanced Gigabit Switches for the Layer 2 Aggregation Requirements of Its Next Generation Network: Philippine Long Distance Telephone Company PLDT started out as a POTS plain old telephone service provider. The company needed a dramatic network bandwidth increase and security/confidentiality of subscriber's network traffic. The challenge was to minimize delays for voice and real-time traffic to meet customer service level agreements and expectations. The...; Tags: Layer 2, Network, Fiber, Allied Telesis, Networking, Telecom & Utilities, Telecommunications; Case studies 2007-03-20
Layer 2 security; the forgotten front: Layer 2 security; the forgotten frontThat's just a real foolish attitude"Whilst locking down the network is important, how many of us are directly going to fiddle with Cisco routers? Also, what is the likelihood of such attacks? A security specialist I talked to once said that he found the most...; Tags: Regulatory compliance, security, Layer 2, attack, network; Discussion threads 2007-01-31
Layer 2 security; the forgotten front: One of the fastest ways for hackers to breech security systems is to circumvent Layer 2 which is your LAN switching infrastructure. Unfortunately that also happens to be one of the most overlooked aspects of Information Security with most security audits focusing on policy and compliance issues on the...; Tags: LANs, Network technology, NETWORKING, LAN, lockdown, Layer 2, security; Blog posts 2007-01-31
Ethernet Automatic Protection Switching (EAPS): The networking industry has relied on the Spanning Tree Protocol STP in large Layer 2 networks to provide a certain level of redundancy. However, STP has proven inadequate to provide the level of resiliency required for real-time and mission critical applications. It is important to note that the entire industry...; Tags: Layer 2, Network, Extreme Networks, Ethernet Automatic Protection Switching, Ethernet, Networking, Network Technology; White papers 2006-11-01

Scalable, High Speed Layer 2 Security Using IEEE 802.1AE/af: While many frameworks exist for securing wireless and remote access networks, there is a surprising security gap in enterprise wired networks. 802.1AE/af provides standards-based wire-speed encryption allowing incremental deployment over Enterprise network segments, without needing to upgrade the whole network in one pass, while retaining IT's ability to monitor and...; Tags: Layer 2, Network, IEEE, Intel Corp., IEEE 802.1AE/af, Remote Access, Telecommunications, Networking, Security; Presentations 2006-09-26
Video File Master (exe): Video File Master is a powerful video editing software that allows you to Cut, Split, Convert and Decompile most of the known video formats easily and efficiently: Video Cutter and Splitter lets you cut a specific region from any video file, split your movie file into two parts at any...; Tags: Digital video, WMV, MPEG, AVI, video, Layer 2, movie, Microsoft Windows Metafile, TIFF, JPEG, software; Software downloads 2006-08-31
Understanding Layer 2, 3 and 4 Protocols: The Key to Content Switching Success: Understanding the concept of a user session—the total user experience of interacting over a period of time with a resource—and how that maps down the OSI seven-layer model and into the frames, packets, and TCP sessions below is key to understanding and successfully deploying content switching. This sample chapter from...; Tags: Layer 2, Prentice Hall Inc., Firewalls, Tcp/Ip, Networking; Book chapters 2006-06-06
Increase Flexibility in Layer 2 Switches by Integrating Ethernet ASSP Functions Into FPGAs: A Layer 2 Ethernet switch connects multiple Ethernet LAN segments. Because each port on the switch can be connected to a different LAN segment, this topology forms a larger Ethernet network. The switch stores the Media Access Controller MAC address - observed in frames received through each port - to...; Tags: Layer 2, Segment, FPGA, Layer 2 Ethernet Switch, Ethernet, LANs, Networking, Network Technology; White papers 2006-02-01
Mitigate Layer 2 attacks against VLANs: This sample chapter, taken from CCSP SNRS Exam Certification Guide (CCSP Self-Study), examines Layer 2 attacks, mitigations, best practices, and functionality. Learn about the most common types of Layer 2 attacks and mitigation strategies. This information, including practice questions, will help you prepare for the CCSP SNRS...; Tags: Layer 2, Cisco Systems Inc., VLAN, Attack; Book chapters 2006-01-11
Secure your network for success with these resiliency best practices: This chapter from Building Resilient IP Networks focuses on Ethernet switching technology, specifically Layer 2 network resiliency and how it should be built to provide a solid foundation for the Layer 3 network. Computer networks are an integral and strategic part of business infrastructure and as such...; Tags: Layer 2, Network, Best Practice, Networking; Book chapters 2005-12-21
Build a scalable, flexible, and highly-available data center: This sample chapter, taken from Cisco Press' Data Center Fundamentals, focuses on three main properties of data center architectures: scalability, flexibility, and high availability. Data centers are rapidly evolving to accommodate higher expectations for growth, consolidation, and security. Although the traditional Layer 2 and Layer 3 designs...; Tags: Chapter, Layer 2, Data Center, Layer 3, Cisco Systems Inc., Data Centers, Storage, Hardware, Data Management; Book chapters 2005-08-19
Impact of Layer 2 Behavior on TCP Performance in WLAN: Ubiquitous networks enabling access by Mobile Nodes MNs at any time and at any location will consist of several different Wireless LANs WLANs, so it is likely that an MN will traverse several WLANs during communication. In such a case, avoiding performance degradation during the handoff becomes a critical issue....; Tags: Layer 2, WLAN, TCP, Handoff Decision, Wireless LANs, LANs, Tcp/Ip, Wi-Fi, Wireless, Networking; White papers 2005-07-07
HAMS: Layer 2 Handoff Accurate Measurement Strategy in WLANs 802.11: The layer 2 handoff latency in WLANs 802.11 has traditionally been measured as the time between the first probe request message sent by the mobile station and the arrival of a reassociation response message from an access point. However, that measure does not represent the time the station remains disconnected...; Tags: Strategy, IEEE 802.11, Layer 2, Handoff, WLAN, Handoff Latency, Wireless LANs, Wi-Fi, Wireless; White papers 2005-02-18
Safe Layer 2 Security In-Depth - Version 2: This white paper published by Cisco Systems discusses various network attacks on a large-scale enterprise network. These network attacks are based on the premise that each device on the network is a potential target. During the time since the original publication date of the SAFE Enterprise white paper, significant research...; Tags: Layer 2, Network, Cisco Systems Inc., Network Attack, Hacking, Security; White papers 2004-03-01
3Com Switch 7700R: Layer 2 Gigabit Ethernet Competitive Benchmark Versus Cisco Systems Catalyst 4507R/Catalyst 6509: Network managers at medium-and large-sized businesses require high switching performance from core network switching products. 3Com's Switch 7700R provides non-blocking, wire-speed throughput when compared with Cisco Catalyst switch alternatives that introduce various levels of blocking, ultimately inhibiting aggregate device throughput. 3Com Corp. commissioned The Tolly Group to evaluate its 3Com...; Tags: Tolly Group, Layer 2, Network, 3Com Corp., Cisco Systems Inc., Networking, Ethernet; White papers 2004-01-14
Sprint—Layer 2/Layer 3 Services Converged Over Common IP Backbone Via L2TPv3 in Cisco IOS Software: A network convergence strategy expected to get top attention from service providers in the next few years is the ability to offer traditional Layer 2 transport protocols over a Layer 3 native Internet Protocol IP core. Sprint is among the first companies to test ...; Tags: Software, Backbone, Cisco IOS, Layer 2, Cisco IOS Software, IP, Cisco Systems Inc., Sprint Communications, Networking; Case studies 2003-03-01
Deploying Private VLANS in the Data Center: Deploying Private VLANs PVLANs in an enterprise data center environment provides an effective means of sparing IP address space and controlling Layer 2 access to servers and devices residing within the server farm. The Layer 2 isolation provided by PVLANs is an excellent way to supplement additional Layer 3 security...; Tags: Layer 2, Data Center, Server Farm, Server, Cisco Systems Inc., Subnet, Data Centers, Storage, Hardware, Data Management; White papers 2003-03-01
MPLS VPNs: Layer 2 or Layer 3? Understanding the Choice: Since there's been data networking, there's been a debate between switched and routed architectures - stated in OSI terms, between performing functions at Layer 3 or Layer 2. Today, we see it again surfacing as network architects consider the design of Virtual Private Networks VPNs that take advantage of Multi-Protocol...; Tags: MPLS VPN, Layer 2, Layer 3, MPLS, VPNs, Networking, Network Security, Telecommunications; White papers 2002-07-05
Deploying AToM for Layer 2 Offerings: Hear an interactive panel discussion with several Cisco experts on how to deploy Any Transport over MPLS to deliver profitable Layer 2 services over your existing MPLS core. Join the experts to explore the technical consideration for migrating services to an MPLS network, including management of service-level agreements SLAs, network...; Tags: Layer 2, AToM, MPLS, Cisco Systems Inc., Network Technology, Networking; Webcasts