Telecommunications Exam 1

The layers of the OSI model, from the top down are - answer-application, presentation, session, transport, network, data link, physical The lower layer of the data link layer is called - answer-Media Access Control IP is implemented at which TCP/IP model layer? - answer-IP benefits of using a layered network model? - answer-it facilitates troubleshooting; it breaks the complex process of networking into more manageable chunks ; it allows layers developed by different vendors to interoperate OSI stands for - answer-Open Systems Interconnect Error detection and recovery takes place at which two layers of the OSI model - answer-Data link Transport The network layer uses physical addresses to route data to the destination - answer-False Which of the following is a transport layer protocol - answer-TCP Bits are packaged into frames at which layer of the OSI model - answer-Data link From the below options, select the two sublayers of the data link layers - answer-MAC- Media Access Control LLC- Logical Link Control A pulse amplitude scheme that uses 10 bits to represent each amplitude is capable of representing ______ different amplitudes - answer-1024 The height of a sound wave is called its ______. - answer-Amplitude With respect to converting digital data into analog signals, AM stands for - answer-Amplitude Modulation What device is used to turn analog sound waves into a bit stream for transmission over a digital circuit? - answer-Codec refers to the difference between the original analog data and the approximation of that data using the techniques for translating from analog data to digital signals - answer-Quantization errors separate channels to reduce interference between channels in frequency division multiplexing - answer-Guard bands Time (non-statistical) division multiplexing differs from frequency division multiplexing because it: - answer-Splits a circuit vertically rather than horizontally can be thought of as dividing the circuit horizontally - answer-Frequency division multiplexing A(n) ______ divides one high-speed communication circuit into several lower speed circuits for the primary reason of saving communication line costs - answer-multiplexer Frequency division multiplexing - answer-operates by dividing a signal into frequency ranges The type of multiplexer that divides the circuit horizontally into different light frequencies that are transmitted simultaneously across many channels is a - answer-Wave division multiplexer What is the decimal value of the byte - answer-3 What is the binary representation of 12? (include leading zeros so that your answer is a byte) - answer- What is the decimal value of the byte ? - answer-255 The loss of strength of a signal as it travels over distance is called - answer-attenuation allows multiple conversations simultaneously travel over a single physical circuit. - answer-Multiplexing Another name for a point to point circuit is a _________________ circuit. - answer-dedicated Logical circuits are described in terms of the media, connectors, and devices used to implement the circuit. - answer-False allows a physical circuit to partitioned into multiple logical circuits - answer-Multiplexing refers to the transmission characteristics of a connection - answer-Virtual circuit A circuit over which the connected parties can transmit and receive simultaneously is referred to as: - answer-Full duplex A(n) __________ circuit is another name for a multipoint configuration - answer-shared Which is not true about point-to-point circuits? - answer-point-to-point circuits are more efficiently than multipoint circuits Having a conversation with someone using a cellular phone is an example of _________ transmission. - answer-full-duplex The two basic types of media are - answer-Guided and unguided Another term for the weakening of a signal as it travels over distance is: - answer-Attenuation refers to the spreading of the signal so that different parts of the signal arrive at different times at the destination - answer-Dispersion Which of the following media is highly secure and can withstand harsh environmental condition - answer-Fiber optic Earth bound microwave transmissions - answer-use high frequency electromagnetic radiation for signalling; require a clear line of sight; do not require use of guided media Which of the following applications supports transferring files across the Internet - answer-FTP With the n-tier client-server architecture, the client is usually responsible for the ________ logic and the server is responsible for the ________ logic. - answer-presentation, data access and storage Which of the following architectures places the greatest load on the network? - answer-n-tier A(n) ___________________________ is the way in which the functions of application software are spread across clients and servers. - answer-Application architecture Which of the following is not a general function by any application program - answer-Application access To interact with the World Wide Web, the client computer must have which type of application software installed? - answer-browser Web browsing is dependent upon which of the following protocols (pick two)? - answer-HTTP & DNS List the layers and their key functions of the OSI model making sure that the layers are listed in the correct order - answer-Please Do Not Touch Steve's Pet Alligator List the layers and their key functions of the TCP/IP model making sure that the layers are listed in the correct order - answer-Please Do Not Touch Alligators What is a PDU? - answer-Protocol Data Unit What are the PDU's accosiated with the physical layer of the TCP/IP model? - answer-bits What are the PDU's accosiated with the data link layer of the TCP/IP model? - answer-frame