The great thing about computer connections is that they were designed to be “idiot proof” for the most part. Very few things can be plugged into the wrong place without force, and if it is plugged into the wrong place, usually no damage is done. All you have to do is match up the shapes of the cable ends to the connector on the back of the computer.
Here’s a quick video that explains some of those connections:
There are only 2 exceptions that I can think of where you can get things turned around with negative (but not drastic) results, and that’s the sound card connections and the PS/2 ports.
The PS/2 ports are the 2 small round ones with several pins in them. Your mouse and keyboard plug into these. Typically they are color coded, but not always. There is usually a symbol next to them on the back of the case indicating which one goes where. If you get them switched, no harm done, they just won’t work right. Just turn the computer off, switch them, turn the computer back on, and they should work fine.
I might add that the connectors need to be turned the right way before pushing them in. Never force them in. If they don’t seem to go in relatively easily, inspect the pins to see if any are bent.
Here’s a diagram of the connections on the back of a Dell Dimension:
I’ve always had problems with the dome light randomly coming on, but now its a real problem since I installed an alarm that uses those switches to tell if someone opens the door. I know where the switches are. I unplugged both of them, and my alarm keeps going off saying the doors are opening. Both are unplugged, so its not a bad switch, but a short to ground somewhere. Does anyone have a schematic, or know where the two wires go to, and/or the routing of them? Thanks for reading!!! – Shawn
The typical Ford wiring is 12V from the fuse box to the switch and the other side of the switch goes to the light. Also the light is fed from a switch either on or associated with the headlight switch so it can be turned on with the doors both closed. If the door switches are disconnected then this switch is where your problem is. The light is grounded on one side. So if it’s coming on intermittently it sure isn’t a short to ground as the switches provide voltage not a ground.
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Is there an adapter to connect standard electric guitar patch cable to RCA connectors?
I have picked up some big old powered speakers that have RCA ports. Is there an adapter so I can plug by Guitar patch cable into them? What would it be called?
You can get 1/4″ to RCA adapters, but it will not do anything to provide a signal the speaker may need. You likely need a preamp of some sort.
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Ethernet was developed at Xerox’s Palo Alto Research Center (PARC) by Robert Metcalfe and David Boggs with Chuck Thacker and Butler Lampson in the early 1970s. Xerox filed a patent application for Ethernet in 1975. Today, Ethernet is based on IEEE standard 802.3 (Institute of Electrical and Electronic Engineers). Metcalfe left Xerox in 1979 and founded 3Com to promote local area networks and personal computers. He persuaded Digital Equipment Corporation (DEC) and Intel to work together with Xerox to promote the DIX (Digital/Intel/Xerox) Ethernet standard. Ethernet is named for the invisible, massless substance that 19th century scientists believed filled the universe. Ethernet was originally based on the same rules as those for polite conversation. Each computer wanting to transmit data waits until there’s a lull in network traffic before attempting to transmit its data. That technology was called CSMA/CD for Carrier Sense Multiple Access Collision Detection and used coaxial cables as a transmission medium. Today, Ethernet uses full duplex transmission over unshielded twisted pair copper cables or fiber optic cables with a system of hubs and/or switches.
Ethernet operates at layer two of the OSI reference model. Layer two, also known as the Data Link Layer, is subdivided into the Logical Link Control (LLC) layer and the Media Access Control (MAC) layer. Ethernet nodes use a globally-unique 48-bit address called the MAC address to communicate within a network. Datagrams at layer two are called frames. The frame structure used by modern Ethernet is the same as that used by earlier coaxial-cabled Ethernet networks, thus providing a level of backwards compatibility.
The original Ethernet operated at a speed of three megabits per second. Today, typical transmission rates for Ethernet are 10 Mbps, 100 Mbps, and 1000 Mbps (Gigabit Ethernet). 10,000 Mbps (10 Gigabit Ethernet) is now starting to emerge. Faster data rates are always under development.
Ethernet Cable Standards
10-Base-2, also known as thinnet, uses coaxial cable, is limited to 10 Mbps, and a maximum segment length of 185 meters. 10-Base 2 is falling into disuse due to the lower cost and greater simplicity associated with UTP (unshielded twisted pair) cabling.
10-Base-5, also known as thicknet, uses coaxial cable, is limited to 10 Mbps, and a maximum segment length of 500 meters. 10-Base-5 is rarely seen anymore.
10-Base-T uses unshielded twisted pair (UTP) cable over a maximum of 100 meters (328 feet) at a data rate of 10 Mbps. 10-Base-T uses only two of the four wire pairs in the cable.
10-Base-FL uses fiber optic lines up to 2000 meters with a maximum data rate of 10 Mbps.
100-Base-TX uses UTP cable over a maximum segment length of 100 meters with a maximum data rate of 100 Mbps. 100-Base-TX also uses only two of the four wire pairs in the cable.
100-Base-FX uses fiber optic cable over a maximum segment length of 2000 meters with a maximum data rate of 100 Mbps.
1000-Base-FX uses fiber optic cable over a maximum segment length of 2000 meters with a maximum data rate of 1000 Mbps (one gigabit per second).
1000-Base-TX uses UTP cable cable over a maximum segment length of 100 meters with a maximum data rate of 1000 Mbps (one gigabit per second). Unlike 100-Base-TX, 1000-Base-TX uses all four wire pairs in the cable.
Copper Cable Categories
Although there are a total of nine categories of unshielded twisted pair (UTP) copper cable, there are really only three that you’re likely to encounter in your local area network. The others are either obsolete or designed for use in backbone networks. The three categories are:
Category 5e: Provides performance of up to 100 MHz, and is frequently used for both 100 Mbit/s and Gigabit Ethernet networks.
Category 6: Provides performance of up to 250 MHz, more than double category 5 and 5e.
Category 6a: Provides performance of up to 500 MHz, double that of category 6 and is even suitable for 10 Gigabit Ethernet networks.
What should you use in your network?
Build your networks with the fastest cable you can afford. Your bandwidth demands will increase over time and retro-fitting your cable plant is disruptive, time-consuming, and expensive.
About the Author
Don R. Crawley, Linux+ and CCNA-certified, is president and chief technologist at soundtraining.net, the Seattle training firm specializing in accelerated, task-oriented training for IT professionals. He works with IT pros to enhance their work, lives, and careers. For more information about learning opportunities with soundtraining.net, visit here.
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Networking concept is widely used in various fields and technologies. Network is an arrangement of intersection horizontal and vertical lines like a structure of a net. A group of points are integrated for various reasons. This concept has been implemented in all technologies. The technologies such as computer systems, telecommunication, mobile cell, information, television, radio, internet, intranet, extranet are advanced because they adopted integration.
The computer systems are most powerful machines in the present world that can be networked in different environment in different situations. Networking in the field of computing is the practice of linking computers together to support digital communication among them. Local Area Network (LAN), Wide Area Network (WAN), Metropolitan Area Networks (MAN), Wireless LAN, Intranet, Internet, and extranet. The client-to-client and server-to-client technology are the basic concept of advanced computer network. As a result, a chain of interconnected computers machines or operations are taken place. Computer networking companies manufacturing network devices for establishing robust networking. The research and development on the technologies create demand of network hardware and devices. Wireless networking and virtual networking is the latest network technologies are going to provide better services to the world.
Intranet runs under one server and many client computers for limited people with security control. For an example, employees of a company can access a network for the internal communications. Extranet is such kind of networking environment that can be shared between more than one group for sharing and communications. The extranet is also security controlled for certain groups. Internet is a world wide network that connects millions of computers around the world. The internet also runs under secure socket level (SSL). The finance, banking, shopping companies run in internet under security level for reliance.
Besides wireless, virtual networking is an advanced networking technology helps people. Virtual Private Network (VPN) is private network in excess public infrastructure. Generally, VPN set up in homes and workplaces of employees for safely log into company networks. VPN is one of the convenient ways to stay connected to the corporate intranet for telecommuters. This network can be found in workplaces, homes and mobile places. Telecommuters travel and find a VPN a more convenient way to stay connected to the corporate intranet. A VPN supplies network connectivity over a possibly long physical distance. In this respect, a VPN is a form of WAN. This VPN has interesting aspects of network protocol design, network service outsourcing, Internet security, and technology standards.
Mobile network provides mobile communications under Wire Less Program (WAP) technology. Certain networks control base transmission stations and links other networks for wide mobile services. Television or radio like wireless network is a group of broadcasting stations connected for a simultaneous broadcast of a program.
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