Very important when users run norton ghost, for example. The layer 3 switch functions at the network layer and performs the multiport, virtual lan, data pipelining functions of a standard layer 2 switch. When we talk about layer 2 and layer 3 networking, it is these layers that. Data communication and computer network 2 all devices connected together with a single device, creating starlike structure. Principles, protocols and practice, release techniques allow to create pointtopoint links while radiobased techniques, depending on the directionality of the antennas, can be used to build networks containing devices spread over a small geographical area. Vlan is layer2 technology which works closely on ethernet. Sample test cases for protocol testing of network devices.
The ubiquity of carrierprovided layer 2 wan networks makes it a required consideration for an organization building a wan. A network can be defined as a group of computers and other devices. Administration from an administrators point of view, a network can be private network which. How computers connected to a layer 2 switch communicate with each other, explained in detail stepbystep. Layer 2, also known as the data link layer, is the second level in the seven layer osi reference model for network protocol design. When we talk about layer 2 and layer 3 networking, it is. For example, if a trunk port has three vlans, 10, 20, and 30, assigned to it with vlan 10 being the native vlan, frames on vlan 10 that leave. Overview of layer 2 networking techlibrary juniper. Tcpip tutorial and technical overview ibm redbooks. Introductiona network can be defined as a group of computers and other devices. Layer 2 protocols basically control access to a shared medium copper, fiber. Preface the goal of this book is to provide a basic understanding of the technical design and architecture of the internet. Switch is configured with the ports on the appropriate vlan.
Layer 2 wan services provide highperformance, costeffective, and reliable services within metropolitan areas and, in some cases, for broader geographic areas. Layer 2 is equivalent to the link layer the lowest layer in the tcpip network model. Mac address, ethernet, token ring, and frame relay are all examples of data link layer. Overview of layer 2 networking techlibrary juniper networks. Tcpip tutorial and technical overview december 2006 international technical support organization gg24337607. All devices connected arbitrarily using all previous ways to connect each other, resulting in a hybrid structure. Describe the function and operation of layer 2 switching. Pdf network security problems have been well known and ad dressed in the. Network layer provides the same functionality as the physical, the data link and. Within the discussion of content networking, we will.