Duplex Settings

There are two types of duplex settings used for communications on an Ethernet network: half duplex and full duplex. The figure shows the two duplex settings available on modern network equipment. Half Duplex: Half-duplex communication relies on unidirectional data flow where sending and receiving data are not performed at the same time. This is similar to how walkie-talkies or two-way radios function in that only one person can...

key elements ethernet 802.3 networks

In this topic, you will learn about key components of the Ethernet standard that play a significant role in the design and implementation of switched networks. You will explore how Ethernet communications function and how switches play a role in the communication process. CSMA/CD Ethernet signals are transmitted to every host connected to the LAN using a special set of rules to determine which station can access the network....

Access Layer Switch Features

Now that you know which factors to consider when choosing a switch, let us examine which features are required at each layer in a hierarchical network. You will then be able to match the switch specification with its ability to function as an access, distribution, or core layer switch.Access layer switches facilitate the connection of end...

Switch Features

Switch Form FactorsWhat are the key features of switches that are used in hierarchical networks? When you look up the specifications for a switch, what do all of the acronyms and word phrases mean? What does "PoE" mean and what is "forwarding rate"? In this topic, you will learn about these features.When you are selecting a switch, you need...

Considerations for Hierarchical Network Switches

Traffic Flow AnalysisTo select the appropriate switch for a layer in a hierarchical network, you need to have specifications that detail the target traffic flows, user communities, data servers, and data storage servers.Companies need a network that can meet evolving requirements. A business may start with a few PCs interconnected so that they can share data. As the business adds more employees, devices, such as PCs, printers,...

what is converged network

Small and medium-sized businesses are embracing the idea of running voice and video services on their data networks. Let us look at how voice and video over IP (VoIP) affect a hierarchical network.Legacy EquipmentConvergence is the process of combining voice and video communications on a data network. Converged networks have existed for a while now, but were only feasible in large enterprise organizations because of the network...

Basic VTP Configuration

Learning ObjectivesPerform basic switch configurations Configure the Ethernet interfaces on the host PCs Configure VTP and security on the switches Configuration Switch 1Switch>enableSwitch#configure terminalSwitch(config)#hostname S1S1(config)#enable secret classS1(config)#no ip domain-lookupS1(config)#line console 0S1(config-line)#password...

Configuring STP

Task 1: Examine the STP Default StateStep 1. Examine link lights.When STP is fully converged, the following conditions exist:All PCs have green link lights on the switched ports.Access layer switches have one forwarding uplink (green) to a distribution layer switch and a blocking uplink (amber) to a core layer switch.Distribution layer switches...

Switched LAN Architecture

Access LayerThe access layer interfaces with end devices, such as PCs, printers, and IP phones, to provide access to the rest of the network. The access layer can include routers, switches, bridges, hubs, and wireless access points. The main purpose of the access layer is to provide a means of connecting devices to the network and controlling...

Physical Implemantation Of Ethernet

Most of the traffic on the Internet originates and ends with Ethernet connections. Since its inception in the 1970s, Ethernet has evolved to meet the increased demand for high-speed LANs. When optical fiber media was introduced, Ethernet adapted to this new technology to take advantage of the superior bandwidth and low error rate that fiber...

MAC - Getting data to the Media

Media Access Control (MAC) is the lower Ethernet sublayer of the Data Link layer. Media Access Control is implemented by hardware, typically in the computer Network Interface Card (NIC).The Ethernet MAC sublayer has two primary responsibilities:Data EncapsulationMedia Access ControlData EncapsulationData encapsulation provides three primary functions:Frame delimitingAddressingError detectionThe data encapsulation process includes...

Ethernet

Ethernet standart and implementationIEEE StandardsThe first LAN in the world was the original version of Ethernet. Robert Metcalfe and his coworkers at Xerox designed it more than thirty years ago. The first Ethernet standard was published in 1980 by a consortium of Digital Equipment Corporation, Intel, and Xerox (DIX). Metcalfe wanted Ethernet to be a shared standard from which everyone could benefit, and therefore it was released...

Basic VLAN Configuration (Activity 3.5.1)

Switch 1Switch>enaSwitch#configure terminalSwitch(config)#hostname S1S1(config)#enable secret classS1(config)#line console 0S1(config-line)#password ciscoS1(config-line)#loginS1(config-line)#line vty 0 15S1(config-line)#password ciscoS1(config-line)#loginS1(config-line)#exitS1(config)#no ip domain-lookupS1(config)#vlan 99S1(config-vlan)#name...

DNS and Protocol Part II

DNS is a client/server service; however, it differs from the other client/server services that we are examining. While other services use a client that is an application (such as web browser, e-mail client), the DNS client runs as a service itself. The DNS client, sometimes called the DNS resolver, supports name resolution for our other network applications and other services that need it.When configuring a network device, we...

DNS Services and ProtocOl

Now that we have a better understanding of how applications provide an interface for the user and provide access to the network, we will take a look at some specific commonly used protocols.As we will see later in this course, the Transport layer uses an addressing scheme called a port number. Port numbers identify applications and Application layer services that are the source and destination of data. Server programs generally...

Configuring VLANs and Trunks(3.3.4)

Learning Objectives1.View the default VLAN configuration. 2.Configure VLANs. 3.Assign VLANs to ports. 4.Configure trunking. setting on S1go to CLI S1#config tS1(config)#vlan 10S1(config-vlan)#name Faculty/StaffS1(config-vlan)#vlan 20S1(config-vlan)#name StudentsS1(config-vlan)#vlan 30S1(config-vlan)#name Guest(Default)S1(config-vlan)#vlan...

how to set topology vlan 99

Learning ObjectivesEstablish console connection to switch.Configure hostname and VLAN99.Configure the clock.Modify the history buffer.Configure passwords and console/Telnet access.Configure login banners.Configure the router.Configure the boot sequence.Solve duplex and speed mismatch.Manage the MAC address table.Configure port security.Secure...

Network Types

a. Local Area Network (LAN) / Local Area Network. A LAN is a network that is limited by the relative area small, generally limited by the environmental area such as a office in a building, or a school, and usually not distance of about one square kilometer. Some models of LAN configuration, one computer is usually on make a file server. Which is used to store software (software) that govern network activity, or as software that...