Random Archives | Page 47 of 56

Sep

15

2014

CCNP (switch)-Lab Routing on a stick

Lab Inter VLAN Routing Suppose we have one layer 2 switch, one router (layer 3 device), 2 PCs. On router we have to create two subinterfaces: 1.Fa 0/0.20 with ip address 20.1.1.1 and 2. Fa 0/0.30 with ip address 30.1.1.1 One PC is member of VLAN 20 with ip address 20.1.1.10 and default gateway will be 20.1.1.1 2nd PC is member of VLAN 30 with ip address 30.1.1.50 and default gateway will be 30.1.1.1 Switch> Switch>en Switch#config Configuring from terminal, memory, or network [terminal]? Enter configuration commands, one per line. End with CNTL/Z. (Creating VLANs) Switch(config)#vlan 2 Switch(config-vlan)#name IT Switch(config-vlan)#exit…

Sep

15

2014

Solar Energy – Sun Powered Desalination for Villages

Around the world, there is more salty groundwater than fresh, drinkable groundwater. For example, 60 percent of India is underlain by salty water — and much of that area is not served by an electric grid that could run conventional reverse-osmosis desalination plants. Now an analysis by MIT researchers shows that a different desalination technology called electrodialysis, powered by solar panels, could provide enough clean, palatable drinking water to supply the needs of a typical village. The study, by MIT graduate student Natasha Wright and Amos Winter, the Robert N. Noyce Career Development Assistant Professor of Mechanical Engineering, appears…

Sep

15

2014

CCNP (switch) – Inter VLAN routing (Routing on a stick)

Inter VLAN Routing By default, different VLANs can’t communicate with each other, a technique through which different VLANs can communicate with each other is known as inter VLAN routing. There are two methods for inter VLAN routing: Router on a stick. SVI (switched virtual interface). Router on a stick: In this method, you need a router (layer 3 device) with a layer 2 switch. If you need inter VLAN routing for 20 different VLANs, than you need 20 interfaces on router for default gateway. To solve this problem, there is a facility provided by Cisco, that you can divide one…

Sep

15

2014

CCNP (switch) – How to configure trunk

Sep

15

2014

Trunk

Trunk A link which connects the switches is known as trunk link, and ports used for trunk link are known as trunk ports. As every interface has specific speed, sometime due to mismatch of speed, link gets down. You can use any port as trunk port, but you have to select the best one or faster than access ports, because heavy traffic of VLANs has to pass through trunk. Types of trunk: Static (manual) Dynamic (automatic) Dynamic trunk: By default, DTP (Dynamic Trunk Protocol) negotiation is enabled on each port of switch. So, if you connect the switches using any…

Sep

14

2014

Hydrogen Fuel Technology Growing in Popularity

HyperSolar, Inc. (OTCQB: HYSR), the developer of a breakthrough technology to produce renewable hydrogen using sunlight and water, commented today on the significance of hydrogen growth in foreign countries, further signifying and advancing hydrogen fuel cell expansion. In just the last two months, Japan, Denmark, and the United Kingdom have announced significant technological breakthroughs and ambitious plans to support hydrogen fuel powered vehicles, and industrial and manufacturing development. On June 19, 2014, Japan laid out a timeline for objectives and actions over the next 25 years to commercialize fuel cell vehicles and utilize hydrogen energy applications for other areas of use. Similarly,…

Sep

14

2014

Health Tips – 5 Ways to Use Tomatoes for Rosy Cheeks and Beautiful Skin

Tomatoes have often been called ‘the poor man’s apple.’ They have been called “the apple of love,” by the French. The Germans even called it “the apple of paradise.” In fact, tomatoes are more popular than apples as 60 million tonnes are produced around the world every year. As much as tomatoes are cheaper to buy than apples, they are rich in vitamins and enzymes that can help you achieve radiant health, from inside out. The humble tomato, which we don’t even give second thought to in this day and age, is actually laden with multiple health benefits. Here are…

Sep

14

2014

The Economic and Reliability Benefits of Concentrated Solar Power with Thermal Energy Storage

Concentrated Solar Power with Thermal Energy Storage First published in 2012, this revised and expanded technical report incorporates the latest research on the economic and reliability benefits of Concentrated Solar Power with thermal energy storage and serves as a comprehensive guide to understanding the design and operational attributes of Concentrated Solar Power plants with thermal energy storage. The report is intended for utilities, regulators, grid operators and policy makers, and presents a framework for more informed decision-making in the evaluation of competing resources to achieve better outcomes for energy consumers. Among the report’s key highlights: • Concentrated Solar Power with thermal energy storage is…

Sep

14

2014

Energy Storage – A Breakthrough Super capacitor for Storing the Energy of the Sun

Conventional batteries store electricity by changing the chemistry of their internal chemical compounds. During discharge, the chemistry is reversed and electrons leave the battery to power an attached load. The chemical reactions that convert electrical energy to and from chemical energy take time, therefore are slower to charge and discharge. This is the reason why you can’t charge your iPhone very fast. In technical terms, batteries exhibit low power density and high energy density. Unlike batteries, supercapacitors store charge in sub-nanoscale crevices through electric fields that naturally form inside its structure. During discharge, electrons rapidly leave through the terminal without…

Sep

14

2014

CCNP (switch) – How to configure VLANs

How to configure VLANs? Suppose you have two members of IT department connected with fastethernet 0/3 and 0/4 ports of switch and you want to create VLAN 2 for IT department. And you have two members for HR department connected with fastethernet 0/7 and 0/9 and want to create VLAN 3 for HR department. Switch#config Configuring from terminal, memory, or network [terminal]? Enter configuration commands, one per line. End with CNTL/Z. (Creating VLAN 2) Switch(config)#vlan 2 Switch(config-vlan)#name IT Switch(config-vlan)#exit (Assigning membership of VLAN 2 to 0/3 and 0/4) Switch(config)#interface fastEthernet 0/3 Switch(config-if)#switchport mode access Switch(config-if)#switchport access vlan 2 Switch(config-if)#exit Switch(config)#interface…