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50 Cards in this Set
- Front
- Back
A ________________ connection provides a dedicated link between two devices.
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point-to-point
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One of the primary disadvantages in a ___________________ topology is that one break in the cable media can stop all data transmissions on the network segment.
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Bus
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The ______________________ is the physical path over which a message travels.
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medium
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As the data packet moves from the upper to the lower layers, headers are _______.
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Added
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In the OSI model, as a data packet moves from the lower to the upper layers, headers are _______.
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removed
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In the OSI model, encryption and decryption are functions of the ________ layer.
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presentation
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In the OSI model, what is the main function of the transport layer?
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process-to-process message delivery
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In the OSI model, when data is transmitted from device A to device B, the header from A's layer 5 is read by B's _______ layer.
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session
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The ________ address, also known as the link address, is the address of a node as defined by its LAN or WAN.
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physical
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The _______ layer changes bits into electromagnetic signals.
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Physical
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The _______ layer lies between the network layer and the application layer.
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Transport
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The ______ layer adds a header to the packet coming from the upper layer that includes the logical addresses of the sender and receiver.
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network
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The ______ layer is responsible for moving frames from one hop (node) to the next.
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data link
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The Internet model consists of _______ layers.
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Five
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The Internetworking Protocol (IP) is a ________ protocol.
a - reliable b - connection-oriented c - both a and b d - none of the above |
none of the above
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The OSI model consists of _______ layers.
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seven
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The physical layer is concerned with the movement of _______ over the physical medium.
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bits
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The process-to-process delivery of the entire message is the responsibility of the _______ layer.
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Transport
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To deliver a message to the correct application program running on a host, the _______ address must be consulted.
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port
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When a host on network A sends a message to a host on network B, which address does the router look at?
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logical
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When data are transmitted from device A to device B, the header from A's layer 4 is read by B's _______ layer.
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Transport
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Which of the following is an application layer service?
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All the above
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Why was the OSI model developed?
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Standards were needed to allow any two systems to communicate
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A port address in TCP/IP is ______ bits long.
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16
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Ethernet uses a ______ physical address that is imprinted on the network interface card (NIC).
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6-byte
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Data can be ________.
1. analog 2. digital 3. (a) or (b) 4. none of the above |
(a) or (b)
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_______ data are continuous and take continuous values.
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analog
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_______ data have discrete states and take discrete values.
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Digital
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A periodic signal completes one cycle in 0.01 s. What is the frequency?
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100 Hz
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As frequency increases, the period ________.
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decreases
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A signal is measured at two different points. The power is P1 at the first point and P2 at the second point. The dB is 0. This means ________.
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P2 equals P1
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A sine wave in the ______ domain can be represented by one single spike in the _____ domain.
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time; frequency
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A sine wave is ________.
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periodic and continuous
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Before data can be transmitted, they must be transformed to ________.
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electromagnetic signals
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For a ______ channel, the Nyquist bit rate formula defines the theoretical maximum bit rate.
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noiseless
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For a ______ channel, we need to use the Shannon capacity to find the maximum bit rate.
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noisy
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Given two sine waves A and B, if the frequency of A is twice that of B, then the period of B is ________ that of A.
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twice
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If the bandwidth of a signal is 15 KHz and the lowest frequency is 52 KHz, what is the highest frequency?
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67 KHz
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If the maximum amplitude of a sine wave is 2 V, the minimum amplitude is ________ V.
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-2
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In a frequency-domain plot, the horizontal axis measures the ________.
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frequency
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What is the bandwidth of a signal that ranges from 10 MHz to 45 MHz?
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35 MHz
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In a time-domain plot, the horizontal axis is a measure of ________.
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time
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The _________ product defines the number of bits that can fill the link.
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bandwidth-delay
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________ is a type of transmission impairment in which an outside source such as crosstalk corrupts a signal.
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Noise
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________ is a type of transmission impairment in which the signal loses strength due to the resistance of the transmission medium.
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Attenuation
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________ is a type of transmission impairment in which the signal loses strength due to the different propagation speeds of each frequency that makes up the signal.
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Distortion
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The _____ of a composite signal is the difference between the highest and the lowest frequencies contained in that signal.
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bandwidth
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_______ describes the position of the waveform relative to time 0.
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Phase
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Baseband transmission of a digital signal is possible only if we have a ____ channel.
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low-pass
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When propagation speed is multiplied by propagation time, we get the ________.
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distance a signal or bit has traveled
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