Topics: Integrated Services Digital Network, Internet Protocol, Data transmission Pages: 8 (1678 words) Published: June 22, 2015

Ethernet Switching Modes
March 2, 2015
Ethernet Switching Modes
Ethernet is one of the most popular networking architecture for LANs. It can offer high performance, low cost, and it is also easy to install and manage. The work of the IEEE 802.3 committee defines the standards of Ethernet and there are also various Ethernet implementations that can support any business’s needs. This paper will distinguish the basics between channels and circuits, Ohm’s law, and network protocols. Network protocols will also be defined against communications failures and what type of technology would businesses benefit from. Lastly, current available systems, enhancements, additional opportunities, and network architecture will be discussed. Basics between Channels and Circuits

A channel is a medium used to carry signals. The channel may be free space, a copper cable, a fiber optic cable, or a combination of all three. In general, channels are exposed to noise that may corrupt the information that they carry. As each channel exhibits different characteristics, they become affected by noise differently. Information signals can be strengthened by means of suitable devices so that information is transferred in an acceptable form. A circuit is a path that is between two or more end points which flows electrical current. In data communication, a circuit is considered as a specific path that is between two or more end points that carries along a signal that can be either analog or digital. The physical path of the circuit may consist of one or more wires and can also be wireless as well. The difference between a circuit and a channel is basically the way that it is utilized. A channel is a portion of the circuit that is used to transmit a single voice or data signal, which can be either a 4 kHz signal in analog transmission or 64 Kb/s signal in digital transmission (Thakur, n.d.). Many channels together can also be contained within a circuit found in WAN technology that provides increased bandwidth within the local loop such as Integrated Services Digital Network (ISDN) or Basic Rate Interface (BRI) services. BRI uses digital signals over POTS. The traditional phone line is divided into separate channels: two 64 Kbps B channels and one 16 Kbps control D channel. ISDN BRI is often called 2B + 1D. PRI uses digital signals over a T1 line with 23 64 Kbps B channels and one 64 Kbps D channel and supports up to 1.544 Mbps, or over an E1 line that is used in Europe with 30 64 Kbps B channels and one 64 Kbps D channel that supports up to 2.048 Mbps. ISDN PRI is often referred to as 23B + 1D. Ohm's Law Importance to Circuit Troubleshooting

Ohm's Law can be applied to circuit troubleshooting for poor connections and faulty components.  Ohm's law is fundamentally a mathematical statement or formula that builds the straightforward relationship that occurs between current, resistance and voltage in regards to electrical circuits.  Networks components are made out of distinctive sorts of circuit boards and circuitry.  Ohm's Law can aids in troubleshooting that you comprehend the relationship between the diverse variables.  Ohm's formula is used to find out the required resistance, voltage or current values so that we can design circuits and choose the right components. Compare circuit and packet-switched networks.

The basic concept of circuit switching is designed to send telephone calls down a dedicated line.  Circuit switched requires point to point connections during calls.  When a call is made a channel remains open and in use throughout the whole call and cannot be used for any other data until the call is ended or disconnected.  The resources remain dedicated to the circuit during the entire it is in use and it can also be used for analog or digital transmission.  It provides temporary but a dedicated connection between two end points no matter how many switching devices the data is routed through.  There are a few...

References: Serpanos, D., & Wolf, T. (2011). Architecture of Network Systems. Retrieved from
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Skillport. (2012). CompTIA Network+ 2012: Networking Concepts Part 2 [Multimedia].
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Skillport. (n.d.). Fundamentals of Telecommunications [Multimedia]. Retrieved from Skillport,
NTC/405 website.
Thakur, D. (n.d.). What are Difference between Circuits, Channels and Multichanneling?
. Retrieved from
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