Week Three Technical Talking Points
...Digital Signal is referred to as “ a signal that uses a constant value of signals” Unk.,(p.2,2001). In simpler terms; it can be thought of as turning a light of and on, or connecting and disconnecting a circuit. Data Transmission Control Data transmission control can be thought of as directing the flow of signals; somewhat like an off and on switch, which guides the direction of a signal. Basic data can be directed by basic digital commands within a transmitter. Two common terms are XON and XOFF. A basic definition would be; XON is the command to begin the flow of signals from a transmitter, and XOFF is the command to terminate the flow of signals from a transmitter. When a computer or related data transmitting device sends out a signal to a receiver, two operations can happen, either a duplex or simplex connection occurs. When two devices are designed to receive and transmit data; this operation is referred to as a duplex data flow. When simple devices only receive signals and perform simple functions, this is referred to as simplex. Two,common connections used to transmit or receive data are parallel or serial connections. Parallel connections are referred to as “multiple connections to and from devices and the workstation. Each wire is a separate line of communication” Brown,B.(1995-2000). Serial connections are defined as “a single wire that sends information or signals one bit of data after another” Brown,B.(1995-2000) . It becomes obvious that a parallel connection would be a much quicker form of communication. Baseband and Broadband The most common forms of World Wide Web and intranet connectivity is Baseband and Broadband. Baseband can also be associated with internet concepts such as Ethernet and Token Ring Networking. An World Wide Web article refers to Baseband as “having its bases in a purely digital realm” Unk.,(2004) and is also defined as “a network that only has representations of 1 or 0, ON or OFF existing on the network media. These may be pulses of electricity or light” Unk.,(2004 ). Broadband often referred to as cable networking; is based on the fact that it shares bandwidth with common cable television signals. This is referred to as carrier signals. These signals are analog but can carry their signals in a multi-directional path. Networking and the World Wide Web There are several new concepts that will be discussed as a primer to later lectures on Networking and the World Wide Web. The first area is Serial Line Protocol and Point to Point Protocol. These are the tools that allow various systems to communicate with each other. When a packet of data is sent by the receiver, the receiver then transmits a return protocol to the transmitter, confirming the data was received. This is often referred to as a virtual hand-shake. Serial Line Internet Protocol (SLIP) is defined as “software allowing the Internet Protocol used on the Ethernet to be used over a standard serial line, which can be connected to a modem” Unk.,(2004). The downfall to SLIP is the fact that IP address needs to be reset each time the connection is created. Point-to-Point Protocol is defined as “the internet standard for transmitting packets over serial point to point links. It is also designed to operate within synchronous and asynchronous environments.” Unk.,(2004). This concept would give more merit to the Point-to-Point being more versatile and less time-consuming. HTTP and FTP are the foundations behind how data is received, assimilated, and transferred by industry standard computers. HTTP is the acronym for Hypertext Transfer Pro...