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ALSO CALLED: Virtual Local Area Networks Hardware, Virtual Local Area Networks Software, IEEE 802.1q, Logical LAN, Virtual LAN Hardware, VLAN Hardware, VLAN Software, Media Access Control Bridges, Virtual Local Area Networks, MAC Bridges, Virtual LAN Software, VLANs, 802.1q, Virtual LAN, Virtual LAN Appliances, Virtual Bridged LAN, Virtual Bridged Local Area Networks
DEFINITION: VLAN hopping (virtual local area network hopping) is a method of attacking a network by sending packets to a port that is not normally accessible from a given end system. (A VLAN is a local area network with a definition that maps devices on some other basis than geographic location - for example, by department, type of user, or primary application.) A VLAN hopping attack can occur in either of two  … 
Definition continues below.
VLANReports
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Basics of Switching
sponsored by Global Knowledge
WHITE PAPER: A switch is a Layer 2 network device that forwards Ethernet frames based on the destination media access control (MAC) address. A switch has RJ-45 ports for connection and the intelligence to read MAC addresses to make forwarding decisions. The purpose of the switch is to quickly and accurately forward frames toward the destination.
Posted: 05 Sep 2013 | Published: 28 Jun 2013

Global Knowledge

Demystifying Switch-based ACLs
sponsored by Global Knowledge
WHITE PAPER: This whitepaper aims to help you better understand switch-based Access Control Lists (ACLs) by exploring what they are used for and how to best utilize them on IOS-based Catalyst devices. View now to learn more!
Posted: 14 Feb 2013 | Published: 14 Feb 2013

Global Knowledge

Demystifying VLAN Trunk Protocol
sponsored by Global Knowledge
WHITE PAPER: This detailed white paper will help you uncover the truth about the often-misunderstood Virtual Local Area Network (VLAN) Trunk Protocol, or VTP. Discover an in-depth overview of how VTP works and see how you can overcome VTP challenges to minimize network outages and more – read on to get started.
Posted: 10 Jan 2013 | Published: 31 Dec 2012

Global Knowledge

Next Generation Network Management Techniques
sponsored by SearchSecurity.com
EZINE: The February edition of the Network Evolution E-zine explore the latest advances in DevOps and uncover what you need to know for working within the movement. Also read several other featured articles!
Posted: 02 Feb 2012 | Published: 02 Feb 2012

SearchSecurity.com

Bringing iPads in the classroom – New requirements to consider
sponsored by SearchSecurity.com
EGUIDE: Discover the benefits a BYOD or iPad-in-the-classroom program has to offer, and learn why a stable wireless LAN is vital to their success.
Posted: 05 Jan 2012 | Published: 05 Jan 2012

SearchSecurity.com

Why Physical Networks Don't Cut It for the Private Cloud
sponsored by SearchSecurity.com
EGUIDE: This expert guide discusses why physical networks don’t cut it for the cloud, addressing multi-tenancy in the private cloud and the cloud VLAN challenge.
Posted: 22 Dec 2011 | Published: 22 Dec 2011

SearchSecurity.com

Understanding the pros and cons of network virtualization
sponsored by SearchSecurity.com
EGUIDE: This expert E-Guide from SearchServerVirtualization.com explains the benefits of virtualizing the network. Find out how to utilize this technology to combine multiple networks into a single logical network. Plus, get answers to common questions about network virtualization technology to ensure a smooth transition.
Posted: 29 Nov 2011 | Published: 29 Nov 2011

SearchSecurity.com

E-Guide: Virtualization implementation and management: A network perspective
sponsored by SearchSecurity.com
EGUIDE: Virtualization has become a reality in the networking world. It is vital for professionals to understand how server virtualization and networks affect each other.
Posted: 21 Nov 2011 | Published: 21 Nov 2011

SearchSecurity.com

Securing Enterprise Networks with a Sharp Eye and a Clear Plan
sponsored by SearchSecurity.com
EGUIDE: Enterprise networks are increasing in size and complexity, creating a larger attack surface for hackers. This TechGuide walks you through gaining visibility into your network and devising an effective security strategy.
Posted: 14 Aug 2014 | Published: 11 Aug 2014

SearchSecurity.com

Airport's Common Use Model Relies on Modular Switches
sponsored by Cisco Systems, Inc.
CASE STUDY: Read how the Greater Toronto Airports Authority adopted Cisco Catalyst 6500 switches in the wiring closet and throughout the network to enable the convergence of data, voice, and video, and provide virtualization to support a Common Use environment.
Posted: 26 Mar 2014 | Published: 12 Jan 2009

Cisco Systems, Inc.

Solution brief: Exceed the Limits with Extreme Networks SDN Solutions
sponsored by Extreme Networks
WHITE PAPER: Explore a portfolio of products that will help you accelerate the adoption of software-defined networking (SDN) within your enterprise.
Posted: 14 May 2013 | Published: 30 Apr 2013

Extreme Networks

Exploring Software-Defined Networking with Brocade
sponsored by Brocade
WHITE PAPER: Software-defined networking (SDN) is a hot topic today. This white paper provides an overview of the concept and the role it will play in achieving cloud success. View now to learn more!
Posted: 09 May 2013 | Published: 30 Apr 2012

Brocade

Network Evolution April 2013
sponsored by SearchNetworking.com
EZINE: This month's issue Network Evolution takes a hardcore look at the hybrid cloud horizon to explore the future possibility of networking across disparate clouds.
Posted: 02 Apr 2013 | Published: 02 Apr 2013

SearchNetworking.com

How Enterprise-Class Services Integrate with Real Companies
sponsored by Comcast
PODCAST: Discover why one of your peers chose Enterprise Services from Comcast to fulfill their need for a high-speed connection between their primary site and disaster recovery site.
Posted: 06 Mar 2013 | Premiered: Dec 31, 2012

Comcast

Managing Virtualized Networks
sponsored by SearchNetworking.com
EGUIDE: This Tech Guide from SearchNetworking.com on managing virtualized networks provides the guidance you need to start putting your ideal on-premises network management system in place, and also touches on the managed services options available. View now to learn more!
Posted: 08 Feb 2013 | Published: 08 Feb 2013

SearchNetworking.com

VXLAN Monitoring: How to Gain Virtual Network Overlay Visibility
sponsored by Ixia
EGUIDE: This expert E-Guide from SearchNetworking.com provides the information you need to gain virtual network overlay visibility for proper VXLAN monitoring. View now to learn more about VXLAN and which readily available tools can help you overcome the visibility hurdle.
Posted: 13 Dec 2012 | Published: 13 Dec 2012

Ixia

Private Cloud Is Imminent, But Is the Physical Network Hostile?
sponsored by Dell, Inc. and Intel®
EGUIDE: This E-Guide from SearchNetworking.com describes why building a private cloud can be hostile to the physical network as we know it. Explore why physical networks don’t cut it in the private cloud and what must be done to ensure cloud success.
Posted: 27 Jun 2012 | Published: 27 Jun 2012

Dell, Inc. and Intel®

Five Best Practices to Protect Your Virtual Environment
sponsored by Juniper Networks, Inc.
WHITE PAPER: Discover how you can realize the benefits of virtualization without sacrificing security in this whitepaper that outlines five best practices to utilize to protect your virtual environment.
Posted: 01 May 2012 | Published: 20 Apr 2012

Juniper Networks, Inc.

Presentation Transcript: Network Performance Improvement - What You Need to Know
sponsored by Dell and VMware
PRESENTATION TRANSCRIPT: In this presentation transcript, get help setting goals for your network before jumping into server virtualization, and discover how these goals can be applied to any sized business. Gain insight on connecting your network to a disaster recovery network, and considerations to make when migrating to the cloud.
Posted: 03 Apr 2012 | Published: 02 Apr 2012

Dell and VMware

Increase Visibility Into Virtual Infrastructures With a Layered Security Strategy
sponsored by CA Technologies.
EGUIDE: Brought to you by SearchNetworking.com, this expert E-Guide unveils how you can increase your visibility with a layered security strategy.
Posted: 30 Mar 2012 | Published: 30 Mar 2012

CA Technologies.

TechGuide: Applying Virtualization Networking in the Cloud
sponsored by Dell, Inc.
EGUIDE: This Tech Guide from SearchNetworking.com explores emerging network virtualization protocols and strategies, and uncovers the need for software-defined networking in cloud environments.
Posted: 28 Mar 2012 | Published: 28 Mar 2012

Dell, Inc.

The Intelligent Campus LAN
sponsored by Juniper Networks, Inc.
EGUIDE: Access this Tech Guide from SearchNetworking.com to learn how you can update your campus LAN to address the modern needs of your network, including application delivery and mobility.
Posted: 27 Mar 2012 | Published: 27 Mar 2012

Juniper Networks, Inc.

Data center networks: How to optimize Ethernet
sponsored by Brocade
EGUIDE: Access this e-guide to read about top considerations to deal with the numerous new demands placed on the data center Ethernet.
Posted: 07 Dec 2011 | Published: 07 Dec 2011

Brocade

Integrating Physical and Virtual Networking – Virtualized Server Connect to the Data Center Fabric
sponsored by Enterasys
WHITE PAPER: Server virtualization has affected all facets of the data center – from servers to storage to the network. While the promise is a reduced capital investment, higher agility and lower operational expenses, the success of server virtualization depends on the integration of both the physical and the virtual network. This has its own set of challenges.
Posted: 22 Nov 2011 | Published: 21 Nov 2011

Enterasys

What Is an Ethernet Fabric?
sponsored by Brocade
WHITE PAPER: Compared to classic hierarchical Ethernet architectures, Ethernet fabrics provide the higher levels of performance, utilization, availability and simplicity required to meet the business needs of data centers today and into the future.
Posted: 15 Nov 2011 | Published: 31 Aug 2011

Brocade
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VLAN DEFINITION (continued): …  ways. If a network switch is set for autotrunking, the attacker turns it into a switch that appears as if it has a constant need to trunk (that is, to access all the VLANs allowed on the trunk port). In Cisco's Dynamic Trunking Protocol (DTP), the susceptibility of a system to this form of VLAN hopping can be minimized by turning off the autotrunking feature (DTP off) on all switches that do not need to trunk. In the second form of VLAN hopping, the hacker transmits data through one switch to another by sending frames with two 802.1Q tags, one for the attacking switch and the other for the victim … 
VLAN definition sponsored by SearchSecurity.com, powered by WhatIs.com an online computer dictionary

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