Data Comp Chapter 7
A hub is designed to perform much faster than a switch.
F
A local area network cannot interface with other local area networks.
F
The local area network first appeared in the 1950s.
F
Wireless local area networks are typically found in seven basic configurations.
F
IEEE created the 100-Mbps Ethernet 802.3u protocol also called ____ Ethernet.
Fast
The IEEE 802.3z standards are also known as ____ Ethernet.
Gigabit
____, a European standard, is capable of transmitting data at a theoretical 54 Mbps using the 5-GHz frequency range.
HiperLAN/2
The ____ LAN is geared toward the small office or home office.
SOHO
A(n) ____________________ is the wireless LAN component that communicates with the wireless user device.
access point
The ____ is essentially the interface device between the wireless user device and the wired local area network.
access point
A transparent bridge creates the internal port table by using a form of ____.
backward learning
Two different signaling technologies can be used with a bus network: baseband signaling and ____ signaling.
broadband
The switch operates in place of a ____.
hub
Whether shared or dedicated segments are involved, the primary goal of a(n) ____ is to isolate a particular pattern of traffic from other patterns of traffic or from the remainder of the network.
switch
In a bus/tree topology, connecting to the cable requires a simple device called a(n) ____.
tap
A(n) ____________________ is the physical (hardware) layout used to interconnect the workstations within a local area network.
topology
More complex bus topologies consisting of multiple interconnected cable segments are termed ____.
trees
One of the more interesting applications for a dedicated segment network and a switch is creating a ____.
virtual LAN
A local area network that is not based primarily on physical wiring but uses wireless transmissions between workstations is a(n) ____.
wireless LAN
With the ____________________ algorithm the workstation listens continuously until the medium is free, then transmits immediately.
1-persistent
____ was the standard created for fiber-optic systems.
100BaseFX
____________________ was designed to support 100-Mbps baseband signals using two pairs of Category 5 unshielded twisted pair.
100BaseTX
____________________ (nicknamed Cheapernet) was designed to allow for a less-expensive network by using less-expensive components.
10Base2
The ____ standard was one of the first Ethernet standards approved.
10Base5
A ____ system transmits 10-Mbps baseband (digital) signals over twisted pair for a maximum of 100 meters per segment length.
10BaseT
One of the most common standards for broadband (analog) Ethernet was the ____________________ specification.
10Broad36
____ was a system designed for twisted pair wiring, but with only a 1-Mbps data transfer rate for 500 meters.
1Base5
The ____ rule states that between any two nodes on a network, there can be a maximum of only five segments (the sections between repeaters), connected through four repeaters, and only three of the five segments may contain user connections.
5-4-3
If a switch has eight 100-Mbps ports, the backplane has to support a total of ____ Mbps.
800
The IEEE ____ standard is said to be capable of 100 Mbps wireless transmissions.
802.11n
A relatively new standard, IEEE ____, was designed to allow multiple devices to intercommunicate and work together to create a virtual LAN.
802.1Q
The wireless LAN standards call a single-cell wireless LAN a(n) _________________________.
Basic Service Set (BSS)
____________________ means that when the signal is transmitted from a given workstation, the signal propagates away from the source in both directions on the cable.
Bidirectional
____ was the first commercially available local area network system and remains, without a doubt, the most popular local area network system today.
Ethernet
The wireless LAN term for a collection of multiple Basic Service Sets is ____.
Extended Service Set (ESS)
1000BaseT is capable of using only the Category 7 cable specification.
F
A local area network is only as strong as its strongest link.
F
Baseband signaling typically uses multiple digital signals to transmit data over the bus.
F
Hubs support only twisted pair cable for interhub connection.
F
If the network is experiencing a high amount of traffic, the chances for collision are small.
F
In a shared segment network, each workstation then has a private or dedicated connection.
F
In the case of CSMA/CD local area networks, as the networks grow in size, their performance increases.
F
The 802.11 specification defined six different types of physical layer connections.
F
The Fast Ethernet standards are based on 1000-Mbps transmission speeds, or 1 gigabit (1 billion bits) per second.
F
The logical link control sublayer defines the layout or format of the data frame, simply called the frame.
F
The most popular example of a contention-based protocol is the token-passing protocol.
F
To promote acceptance, the ____________________ suite of protocols was created to support the many different types of wireless local area networks in existence.
IEEE 802
"Wireless Ethernet" is a local area network that is not based primarily on physical wiring but uses wireless transmissions between workstations.
T
1000BaseSX was the first Gigabit Ethernet standard.
T
A cut-through switch does not store a data frame and then forward it.
T
A hub is a simple device that requires virtually no overhead to operate.
T
A rule known as the 5-4-3 rule helps guide the design of a shared-access Ethernet.
T
All bus networks share a major disadvantage: In general, it is difficult to add a new workstation if no tap currently exists.
T
By keeping all of the application on the server, the network can control access to the software and can reduce the amount of disk storage required on each user's workstation for this application.
T
In the wireless LAN ad hoc layout configuration, each user device communicates directly with the other user devices.
T
Most modern local area networks provide the capabilities of transferring video images and video streams.
T
Most switches are transparent, which means they learn by themselves.
T
One of the biggest advantages of local area networks is their ability to share resources in an economical and efficient manner.
T
Perhaps the strongest advantage of a local area network is its capability of allowing users to share hardware and software resources.
T
Switches can be used in combination with routers to further isolate traffic segments in a local area network.
T
Switches can significantly decrease interconnection traffic and increase the throughput of the interconnected networks or segments.
T
The SOHO LAN (small office home office) is one the fastest growing segments of the networking market.
T
The bus/tree topology was the first physical design used when local area networks became commercially available in the late 1970s.
T
The hub, in most applications, has been replaced with the switch.
T
The term "Base", such as in 100BaseT, is an abbreviation for baseband signals using a Manchester encoding.
T
Three of the most popular local area network systems are Ethernet, IBM Token Ring, and Wireless Ethernet.
T
Using coaxial cable to transmit analog signals, 10Broad36 can transmit data at 10 Mbps for a maximum segment distance of 3600 meters.
T
With the CSMA/CD protocol, only one workstation at a time can transmit.
T
____ cabling has become the preferred medium for star-wired bus topologies.
Twisted pair
The ____ topology consists of a simple cable, or bus, to which all devices attach.
bus/tree
The type of algorithm that tries to avoid collisions is called _____________________________________________.
carrier sense multiple access with collision avoidance (CSMA/CA)
The most popular contention-based protocol is ____.
carrier sense multiple access with collision detection (CSMA/CD)
A(n) ____________________ occurs when two or more workstations listen to the medium at the same moment, hear nothing, and then transmit their data at the same moment.
collision
The interval during which the signals propagate down the bus and back is the ____.
collision window
A(n) ____________________ protocol is basically a first-come, first-served protocol.
contention-based
In a ____ architecture, the data frame begins to exit the switch almost as soon as it begins to enter the switch.
cut-through
In ____ segment networks, a switch may be directly connected to a workstation, and the switch connects to the hub.
dedicated
A local area network performs file serving when it's connected to a workstation with a large storage disk drive that acts as a central storage repository, or ____ server.
file
A ____ is a device that interconnects two or more workstations in a star-wired bus local area network and immediately retransmits the data it receives from any workstation out to all other workstations connected.
hub
In CSMA/CA, the amount of time a device is made to wait before it can transmit is called the ____.
interframe space (IFS)
A(n) _________________________ is a communications network that interconnects a variety of data communications devices within a small geographic area and broadcasts data at high data transfer rates.
local area network (LAN)
The ____ design of a network determines how the data moves around the network from workstation to workstation.
logical
The ____ sublayer is primarily responsible for logical addressing and providing error control and flow control information.
logical link control (LLC)
A(n) ____ protocol is the software that allows a workstation to place data onto a local area network.
medium access control
The ____ sublayer contains a header, computer (physical) addresses, error-detection codes, and control information.
medium access control (MAC)
In the ____ layout configuration, multiple cells are supported by multiple access points, as in a cellular telephone network.
multiple-cell
The ______________________________ is an electronic device that performs the necessary signal conversions and protocol operations that allow the workstation to send and receive data on the network.
network interface card (NIC)
A(n) ____________________ protocol is one in which you cannot calculate the time at which a workstation will transmit.
nondeterministic
The tap is a(n) ____________________, as it does not alter the signal and does not require electricity to operate.
passive device
In the ____, or ad hoc, layouts configuration, there is no access point at the center of a cell.
peer-to-peer
The ____________________ design refers to the pattern formed by the locations of the elements of the network, as it would appear if drawn on a sheet of paper.
physical
With ____, you can send electrical power over the Ethernet connection.
power over Ethernet (PoE)
The local area network software called a ____ server provides workstations with the authorization to access a particular printer, accepts and queues prints jobs, prints cover sheets, and allows users access to the job queue for routine administrative functions.
The ____ is used to connect local area networks to wide area networks.
router
In IEEE 802.3 standard for CSMA/CD, frames shorter than 64 bytes are considered ____________________, or frame fragments.
runts
Depending on user requirements, a switch can interconnect two different types of CSMA/CD network segments: ____ segments and dedicated segments.
shared
When two or more hubs are interconnected and a workstation transmits data, all the workstations connected to all the hubs receive the data. This is an example of a(n) ____.
shared network
The most popular configuration for a local area network is the ____ topology.
star-wired bus
A ____ is a device that interconnects two segments of local area networks and acts as a filter.
switch
Early local area networks transmitted data at only ____ million bits per second.
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