Mang 3778 chapter 11
A cable company transmits ten channels of information on a single coaxial cable, with each channel using 25 Mhz. This coaxial cable uses broadband communication based on the technical definition of broadband. Select one: True False
False
USB cables have a recommended maximum length of 100 meters due to attenuation in cables. Select one: True False
False
A website requires that you upload a photograph in jpeg format. Jpeg is an acronym for joint photographic experts group. Select one: True False
True
Broadcast TV signals, Microwave radiation used in ovens, Visible light and X-Rays used in medicine are all electromagnetic radiation but use different frequencies. Select one: True False
True
Broadcast TV signals, Microwave radiation used in ovens, Visible light and X-Rays used in medicine are all electromagnetic radiation but use different frequencies. Select one: True False
True
Cat 6 computer network cables have a recommended maximum length of 100 meters. Select one: True False
True
Five offices share space in one building. Each office operates its own wi-fi network. The signals from the five wi-fi networks can interfere with one another. Select one: True False
True
Five offices share space in one building. Each office operates its own wi-fi network. The signals from the five wi-fi networks can interfere with one another. Select one: True False
True
Higher frequency electro-magnetic signals are less capable of going through solid objects and limited to line of sight transmission. Select one: True False
True
MAC addresses are globally unique IDs encoded in the network chip by the manufacturer. Select one: True False
True
The frequency band used by home wifi devices has a lower frequency than visible light. Select one: True False
True
The maximum signal strength of home wifi is limited by FCC regulation. Select one: True False
True
The network topology refers to the way in which the different elements of a computer network are interconnected Select one: True False
True
VPNs include encryption technology to ensure that business data travels on the public net using high quality encryption Select one: True False
True
Network bandwidth is expressed in ______________ per second.
bits
The ________________ protocol for communication is widely used in bus topologies. It is described as a CSMA-CD system.
Ethernet
The __________________ protocol for communication is widely used in bus topologies. It is described as a CSMA-CD system.
Ethernet
The MAC address for a network card has ________________. Select one: a. 48 bytes b. 6 bits c. 32 bytes d. 6 bytes e. 32 bits f. 48 bits
F
PAN stands for ______________ area network.
Personal
PAN stands for _________________ area network.
Personal
__________________ is the interference from signals in one wire, impacting signals in another adjacent wire.
Crosstalk
___________________ is the interference from signals in one wire, impacting signals in another adjacent wire.
Crosstalk
A __________________ topology for networks uses one main communications highway to transmit data. The devices are connected to a linear network segment. Select one: a. bus b. hybrid c. ring d. star e. mesh
A
A __________________ topology is a highly interconnected network with devices linked to many other devices. This can be used to create a resilient network where the failure of a few nodes or links will not destroy the network. Select one: a. mesh b. ring c. star d. hybrid e. bus
A
A business sets up a wired computer network linking 10 computers in an office to a internet router/gateway. The distances between the devices range from 10 to 50 meters. The building attenuates wi-fi signals and wi-fi is not feasible. The office has standard desktop computers. The preferred type of cable for the wired link is __________________. Select one: a. CAT 5 b. coaxial c. fiber optic d. USB e. none of the other choices
A
A popular standard to digitize and compress audio signals is _______________. Select one: a. MP3 b. CSMA/CD c. H.264 d. XML e. jpeg
A
A popular standard to encode and compress video streams for transmission over the net is _______________. Select one: a. H.264 b. jpeg c. XML d. MP3 e. CSMA/CD
A
Bluetooth connections are typically made over a distance of a ___________________. Select one: a. a few meters. b. 100 to 500 meters. c. 10 centimeters or less
A
In cell phone networks, each tower's range is a cell and multiple cells create a ____________ network. Select one: a. honeycomb like b. cloud like c. matrix d. unlicensed band
A
The FCC definition of broadband in 2015 is ____________ Select one: a. 25 Mbps downstream and 3 Mbps upstream. b. none of the other choices. c. 25 Mbps upstream and 3 Mbps downstream. d. 4 Mbps upstream and 1 Mbps downstream. e. 4 Mbps downstream and 1 Mbps upstream.
A
The Federal Communications Commission was created under the __________________ Select one: a. Communications Act of 1934 b. Communications Act of 1974 c. Digital Millennium Copyright Act d. HIPPA
A
When a thousand customers connect their smartphones to a particular cell tower they ____________________. Select one: a. share the available bandwidth of the cell tower. b. communicate on separate channels and therefore do not need to share bandwidth. c. re-use the same bandwidth in an adjoining geographical area. d. operate in unlicensed bands and have limited signal strength.
A
_________________ cables use twisted pairs of copper wires. Select one: a. Cat 6 b. optic fiber c. coaxial
A
_________________ cables use twisted pairs of copper wires. Select one: a. Cat 6 b. optic fiber c. coaxial
A
The loss of signal power as it travels through a communication channel is termed _______________.
Attenuation
A business sets up a wired computer network linking 10 computers in an office to a internet router/gateway. The distances between the devices range from 10 to 50 meters. The building attenuates wi-fi signals and wi-fi is not feasible. The office has standard desktop computers. The preferred type of cable for the wired link is __________________. Select one: a. coaxial b. CAT 5 c. USB d. none of the other choices e. fiber optic
B
A network link is rated at 6 million bits per second. This is written as ___________. Select one: a. 6 tbps b. 6 Mbps c. 6 MBPS d. none of the other choices e. 6 TBPS
B
Routers read the destination _____________ and direct the packet on the internet. Select one: a. MAC address b. IP address c. wi-fi address d. bandwidth
B
The Federal Communications Commission was created under the __________________ Select one: a. HIPPA b. Communications Act of 1934 c. Communications Act of 1974 d. Digital Millennium Copyright Act
B
The MAC address for a network card has ________________. Select one: a. 48 bytes b. 48 bits c. 32 bytes d. 6 bytes e. 32 bits f. 6 bits
B
______________ computer network cables have separators to reduce interference and can carry data at rates exceeding a gigabit per second. Select one: a. Cat 5e b. Cat 6 c. Cat 5
B
Network bandwidth is expressed in _____________ per second.
Bits
A business needs to connect offices in New Orleans, Baton Rouge, Houston, Dallas, and Atlanta. The computer network required to link these offices is a ________________. Select one: a. MAN b. LAN c. WAN d. PAN
C
A digital transmission line has a bandwidth of 50 Gbps. This means it has a speed of ________________. Select one: a. 50 million bytes per second. b. 50 million bits per second. c. 50 billion bits per second. d. 50 billion bytes per second.
C
A wired computer network connection is unreliable and signals are not transmitted effectively. The most likely cause of the problem is ____________________. Select one: a. interference from other wireless networks b. bandwidth throttling by internet providers c. damage close to the end of the cable or to the network connection socket in the computer d. cable length is too long e. none of the other choices
C
A wired computer network connection is unreliable and signals are not transmitted effectively. The most likely cause of the problem is ____________________. Select one: a. interference from other wireless networks b. bandwidth throttling by internet providers c. damage close to the end of the cable or to the network connection socket in the computer d. cable length is too long e. none of the other choices
C
Bluetooth connections are typically made over a distance of a ___________________. Select one: a. 10 centimeters or less b. 100 to 500 meters. c. a few meters.
C
In the Ethernet network, what happens when two machines send a signal at the same time? Select one: a. None of the Other Choices, b. Two machines never send their signal at the same since they work in sequence c. The two signals collide causing a surge in signal strength and loss of both signals. d. The signals from the two machines travel in separate virtual channels. Hence they never collide. e. The signal from the higher priority machine goes through and the other is lost.
C
Internet backbones use __________________. Select one: a. Coaxial Cables with capacities in the range of 100's of Gbps. b. optic fibers with capacities in the range of 5-50 Mbps. c. optic fibers with capacities in the range of 100's of Gbps. d. UTP cables with capacities in the range of Tbps.
C
______________ computer network cables have separators to reduce interference and can carry data at rates exceeding a gigabit per second. Select one: a. Cat 5 b. Cat 5e c. Cat 6
C
_______________ cables used in computer networking have separators to reduce interference and can carry data at rates exceeding a Gbps.
Cat 6
The Ethernet protocol for communication, popular in bus networks, uses CSMA-CD. This stands for carrier sense multiple access with _________________ detection.
Collision
A digital transmission line has a bandwidth of 50 Gbps. This means it has a speed of ________________. Select one: a. 50 billion bytes per second. b. 50 million bytes per second. c. 50 million bits per second. d. 50 billion bits per second.
D
A popular standard to encode and compress video streams for transmission over the net is _______________. Select one: a. XML b. CSMA/CD c. MP3 d. H.264 e. jpeg
D
Bluetooth is a popular ______________________. Select one: a. LAN b. WAN c. MAN d. PAN
D
In cell phone networks, each tower's range is a cell and multiple cells create a ____________ network. Select one: a. matrix b. unlicensed band . c. cloud like d. honeycomb like
D
In the Ethernet network, what happens when two machines send a signal at the same time? Select one: a. Two machines never send their signal at the same since they work in sequence b. None of the Other Choices, c. The signals from the two machines travel in separate virtual channels. Hence they never collide. d. The two signals collide causing a surge in signal strength and loss of both signals. e. The signal from the higher priority machine goes through and the other is lost.
D
Routers read the destination _____________ and direct the packet on the internet. Select one: a. bandwidth b. MAC address c. wi-fi address d. IP address
D
When a thousand customers connect their smartphones to a particular cell tower they ____________________. Select one: a. communicate on separate channels and therefore do not need to share bandwidth. b. re-use the same bandwidth in an adjoining geographical area. c. operate in unlicensed bands and have limited signal strength. d. share the available bandwidth of the cell tower.
D
Radio is streamed on iHeart Radio, television is streamed on Hulu, and newspapers like the Wall Street Journal are delivered online through the internet connection.. When all forms of media are delivered over the same channel is is termed ________________.
Digital Convergence
Radio is streamed on iHeart Radio, television is streamed on Hulu, and newspapers like the Wall Street Journal are delivered online through the internet connection.. When all forms of media are delivered over the same channel is is termed _____________________.
Digital Convergence
A __________________ topology for networks connects all the devices to a central node, directly. The central node manages communication and sequentially addresses the devices. Select one: a. ring b. hybrid c. bus d. mesh e. star
E
A __________________ topology for networks connects all the devices to a central node, directly. The central node manages communication and sequentially addresses the devices. Select one: a. ring b. hybrid c. mesh d. bus e. star
E
A __________________ topology for networks uses one main communications highway to transmit data. The devices are connected to a linear network segment. Select one: a. star b. ring c. mesh d. hybrid e. bus
E
A network link is rated at 6 million bits per second. This is written as ___________. Select one: a. 6 TBPS b. 6 Mbps c. 6 tbps d. none of the other choices e. 6 MBPS
E
The _____________________ topology refers to the way in which data flows in the network. Select one: a. material b. physical c. neural d. inductive e. none of the other choices
E
The most recent standard for cable modems is ________________. Select one: a. DSL b. DOCSIS 1.0 c. none of the other choices. d. DOCSIS 2.0 e. DOCSIS 3.0
E
MAC addresses are used globally to identify the machine visiting a website. Select one: True False
False
Routers read the source IP address and direct the packet on the network. Select one: True False
False
A business with operations in two buildings a block apart connects computers using wired networks in each building, and the two building networks connected by a microwave link which goes over city streets. This is an example of a _________________. Select one: MAN WAN LAN
MAN
A business with operations in two buildings a block apart connects computers using wired networks in each building, and the two building networks connected by a microwave link which goes over city streets. This is an example of a _________________. Select one: MAN . LAN Internet WAN
MAN
MAC address stands for ______________ address.
Media Access Control
Modem is a contraction of two words. Enter either one of the two words in your answer.
Modulation
Routers access a small database which lists IP address ranges and where to send the packet. This is called a _______________.
Routing Table
Routers direct traffic on the internet and on local area networks which use internet standards. Select one: True False
True
Routing tables need to be updated when new machines are added to the network. Select one: True False
True
A WAN is a _____________network.
Wide Area
The loss of signal power as it travels through a communication channel is termed ______________
attenuation
A business VPN's traffic may travel on the same fiber optic backbone as public net traffic, but can be kept separate from public traffic at the ISPs routers, and may even always be routed on the ISPs own backbones, ensuring a trusted delivery network. VPN stands for _________________ .
virtual private network