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50 Cards in this Set
- Front
- Back
The decimal number 255 is equal to the hexadecimal number |
ff |
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________ can be defined as the weakening of a signal's strength as it travels through a circuit. dB Ambiguation attenuation representation |
Ambiguation |
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A switch receives a frame with a unicast MAC address, but the switch does not have a entry in its address forwarding table for the frame's MAC destination address. What does the switch do? Filter the frame Forward the frame Delete the frame Flood the frame |
Flood the frame |
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In the IEEE 802 implementation, the Logical Link Control (LLC) sits above ________. MAC Address Physical Ethernet Media Access Control (MAC) |
Media Access Control (MAC) |
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The octal number 734 is equal to the binary number |
111011100 |
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When connecting two PCs, what cable is used? |
crossover |
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Attenuation is the ________ of a signal's strength as it travels over a medium. |
decrease |
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With a(n) ________ circuit, bandwidth is usually measured in bps (bits per second). |
digital |
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Which of the following is not susceptible to EMI? CAT 6 twisted pair fiber coax |
fiber |
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QAM is one popular combination method and stands for: |
quadrature amplitude modulation |
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The binary number 10100101 is equal to the hexadecimal number |
a5 |
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What is one benefit of twisting wires around each other at regular intervals (for twisted-wire pairs)? The wires do not take up as much space Attenuation is reduced The wires remain more secure Noise on an individual wire is significantly reduced |
Noise on an individual wire is significantly reduced |
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The maximum lenght of an Ethernet segment using twisted pair is: |
100m |
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The physical layer of the OSI data communication networking model is responsible for the ________ of bits, line configuration, physical topology, and the transmission mode.
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synchronization
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What does PDU stand for?
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protocol data unit
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the first half of a MAC address is the:
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organizationally unique identifier
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Which of the following commands is used in Windows to reveal the NIC MAC address?
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ipconfig /all
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What type of cable is characterized as flat, light blue, and is needed to configure a router?
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rollover
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Ethernet was created by Xerox Corporation and later formalized by the Institute of Electrical and Electronics Engineers (IEEE) as what standard?
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802.3
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The hexadecimal number CAC is equal to the decimal number |
3244 |
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LED stands for |
light emitting diode |
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The binary number 110010110 is equal to the decimal number |
406 |
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WDM stands for: |
wavelength division multiplexing |
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Of the following modulation techniques, which one is the most susceptible to noise and distortion during transmission? phase amplitude these are all equally susceptible frequency |
amplitude |
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Which layer in an OSI data communication networking model is responsible for packets? |
network layer |
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The IEEE divided the data link layer into which two parts? |
Logical Link Control and Media Access Control |
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The hexadecimal number ACE is equal to the binary number |
101011001110 |
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The three kinds of Type 2 frames are: |
information (I), supervisory (S), unnumbered (U) |
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An example of ________ communication is the use of walkie-talkies that permit two users to speak or listen to each other, but not both at the same time. |
half-duplex |
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A millisecond is: 1/1,000 second 1/10,000 second 1/1,000,000,000 second 1/1,000,000 second |
1/1,000 second |
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What is layer 2 of the TCP/IP model called |
Internet |
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Which layer in an OSI data communication networking model ensures that the entire message sent from a sender to a receiver has been delivered in proper order? |
transport layer |
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The hexadecimal number FACE is equal the the octal number |
175316 |
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A ________ is a specially formatted sequence of bits and occurs at the data link layer. modulation frame transmission packet |
frame |
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In Ethernet, the default maximum payload is: |
1500 bytes |
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In Ethernet, the default maximum payload is: |
Network Interface Card |
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The ________ layer of the OSI data communication networking model takes packets from the network layer and packages the bits into units called frames and then attaches a physical address to each frame. |
data link |
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A network layer service is implemented using a(n) |
protocol |
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Which if the following is a valid MAC address AAD909075189 AAD9090751 AAD909075189B AAG909075189 |
AAD909075189 |
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Is the method used to digitally represent, convert, and reconstitute analog data to an equivalent digital signal: Phase-Division Multiplexing Frequency-Division Multiplexing Quadriture Amplitude Modulation Pulse-Code Modulation Time-Division Multiplexing |
Pulse-Code Modulation |
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Physical addressing is an important function of the ________ layer. |
data link |
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________ are devices that convert an analog signal into an digital signal on the sending end and then, at the receiving end, reconvert the signal from digital back to analog. |
Codecs |
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What is a LAN's likely first response to correct a transmission error |
The data are simply retransmitted. |
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n everyday example of ________ is a one-way street multiplex half-duplex full-duplex simplex |
simplex |
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The OSI layer that has neither a header nor a trailer is: |
Physical |
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One micron is about 1/________ of an inch. |
25,000 |
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Memoranda, published by the Internet Engineering Task Force, that describe methods, behaviors, research, or innivations applicable to the workings of the Internet and Internet-connected systems are known as: |
request for comments |
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The so-called "end-to-end" layers in the OSI model are: |
application, presentation, session, and transport |
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TDM stands for |
time division multiplexing |
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What are the layers of the Open Systems Interconnection (OSI) model? |
hysical, data link, network, transport, session, presentation, application |