Telecommunications 1. Describe a local land line phone system based on the following Landline Telephone Components. a. Local Loop - consists of twisted pair copper cables with a maximum length of three miles. It is a physical link from the customer to the service provider’s network; the local loop terminates in a circuit switch housed in a local exchange carrier or telephone exchange. b. Central Office - a building used to house the inside plant equipment including support for up to 20 local exchanges
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are the main telecommunications transmission media and types of networks? The principal physical transmission media are twisted copper telephone wire‚coaxial copper cable‚ fiber-optic cable‚ and wireless transmission. Twisted wire enables companies to use existing wiring for telephone systems for digital communication‚ although it is relatively slow. Fiber-optic and coaxial cable are used for high-volume transmission but are expensive to install. Microwave and communications satellites are used for
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unique MAC address. The IEEE is responsible for assigning MAC addresses to the vendors of network interface cards. No two cards ever manufactured should share the same address. Hubs An Ethernet hub or concentrator is a device for connecting multiple twisted pair or fibre optic Ethernet devices together‚ making them act as a single segment. It works at the physical layer of the OSI model‚ repeating the signal received at one
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a previous specification called Alohanet‚ Ethernet was originally developed by Xerox PARC. Later‚ it was further developed by the other companies like INTEL‚ DEC‚ AND Xerox. Wire is used to connect the devices in Ethernet. Coaxial cable or special grades of twisted pair cables are used in wire of the Ethernet. 10 BASE-T is the most commonly used Ethernet that provides 10 Mbps data transmission speed. The data are segmented into packets and carried through the network using Carrier Sense Multiple
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The WAN A natural extension of the LAN is the wide area network (WAN). A WAN connects remote LANs and ties remote computers together over long distances. The WAN provides the same functionality as the individual LAN‚ but on a larger scale - electronic mail‚ applications‚ and files can now move throughout the organization-wide internet. WANs are‚ by default‚ heterogeneous networks that consist of a variety of computers‚ operating systems‚ topologies‚ and protocols. The most popular internetworking
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bits are borrowed when sub netting is the host. The transport layer ultimately passes data up to the application layer. A MAC address is associated with the Data Link Layer. An IP address is associated with Network Layer. Twisted pair‚ Coaxial and Fiber Optic are types of cable The capacity of a circuit to carry data is its bandwidth. A 32-bit bus can handle four times the data bits as an 8-bit bus. LAN resources might include software‚ hardware and data. Data bits are frequently passed through
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higher would make the receiver electronics more difficult. 4.1.3 Hospitals‚ security systems‚ PA & recording studios. The drawback of STP cables is that they will increase the total cost of an installation. STP cables are more expensive due to the shielding‚ which is an additional material that goes into every meter of the cable. The shielding also makes the cable heavier and stiffer. Thus‚ it is more difficult to handle. 4.1.4 Cat 3 10Mbps Token/10 base T Cat 4 16Mbps Token Cat 5 100Mbps Ethernet/Token
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Guide to Networking Essentials‚ 6th ed.‚ ISBN 1111312524 Chapter 1 Solutions - REVIEW QUESTIONS 1. Which of the following is one of the three basic functions a computer performs? (Choose all that apply.) a. Processing 2. c. Input e. Output The __________ executes instructions provided by computer programs. a. CPU 3. When a CPU is composed of two or more processors‚ each one is referred to as a(n) ________. b. Core 4. Which of the following is considered long-term
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motors‚ heating units 4.1.3 A very common application is the health care field. Shielded copper cable is often used in health care facilities for its efficiency and resistance to flame. The use of shielded cables in security systems provides some protection from power frequency and radio frequency interference‚ reducing the number of false alarms being generated. The best practice is to keep data or signal cables physically separated by at least 3 inches (75mm) from ’heavy’ power circuits which are in
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communicate over a network with one another internally‚ otherwise known as an intranet. Each Kudler location would represent a LAN since each location has an internal network that is sharing local resources. The majority of LANs are connected using cables with copper or optics‚ but a network setup to communicate wirelessly is referred to as a wireless network. Wireless Networks connect devices without wires‚ some examples are cellular networks‚ Wi-Fi networks or terrestrial microwave networks. Wireless
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