CSC 285 - Ch. 3 Quiz Questions

802.11a operates at _____ Mbps.

54

802.11g can transmit at _____ Mbps.

54

the four common varieties of wireless LANs are

802.11a, 802.11b, 802.11g, 802.11n

What is the name of the media access method used by Ethernet?

Carrier Sense Multiple Access with Collision Detection (CSMA/CD)

When a wireless computer connects with an AP before it connects with other devices, it is operating in _____ mode.

Infrastructure

Network __________________ is the method a network interface uses to access the medium and send data frames and the structure of these frames.

Technology

Which media access method is used by FDDI?

Token-passing

CSMA/CA is used by _____ networks

Wi-Fi

What is the media access method used by Ethernet? a. CSMA/CD b. CSMA/SNAP c. CSMA/CA d. All of these e. CSMA/CD and CSMA/CA

a

What is the most common topology and technology combination in use today? a. switched / Ethernet b. logical bus / wireless LAN c. logical bus / Ethernet d. logical ring / token ring e. switched / wireless LAN

a

What is the wireless device used to link buildings without cable? a. Bridge b. None c. Router d. Switch e. Hub

a

Which of the following is not a component of an Ethernet frame? a. None b. Type c. Frame check sequence (FCS) d. Destination MAC address e. Source MAC address

a

Which of the following is a characteristic of a logical ring topology? (Choose all that apply.) a. Some technologies use a token. b. One technology uses an MAU. c. It's used by FDDI. d. It's used by Ethernet. e. It's the most popular logical technology

a, b, c

Which of the following is a field of the most common Ethernet frame type? (Choose all that apply.) a. FCS b. Destination MAC Address c. Preamble d. Data e. Length

a, b, d

Which of the following is a characteristic of unshielded twisted-pair cabling? (Choose all that apply.) a. Susceptible to electrical interference b. Commonly used in physical bus topologies c. Has a distance limitation of 100 meters d. Consists of four wires e. It is relatively expensive

a, c

Which of the following is considered a property of Ethernet? (Choose all that apply.) a. Best-effort delivery system b. Inherently secure c. Scalable d. Obsolete technology e. Guaranteed delivery system

a, c

Which of the following is true about full-duplex Ethernet? (Choose all that apply.) a. It's possible only with switches. b. Stations can transmit and receive but not at the same time. c. Collision detection is turned off. d. Each link becomes a separate broadcast domain. e. It allows a physical bus to operate much faster.

a, c

Which of the following is a characteristic of fiber-optic cabling? (Choose all that apply.) a. Carries data over longer distances than UTP does b. Lower bandwidth capability c. Used in large internetworks to connect switches and routers d. Requires only a single strand of fiber for network connections e. Can be used in electrically noisy environments

a, c, e

Which of the following is a feature of 802.11n? (Choose all that apply.) a. Operates at the 2.4 GHz and the 5.0 GHz frequencies b. Provides up to 8 data streams c. Has an indoor range of 150 feet d. Offers speeds up to 600 Mbps e. The fastest of the 802.11 standards

a, d

Which of the following is NOT an advantage of a physical star? a. use of faster technologies b. provides redundancy and fault tolerance c. easier network upgrades d. centralized monitoring and management of traffic e. None of these choices

b

Which of the following is true of a MAC address? a. All binary 1s in the source address indicates a broadcast frame. b. A destination address of 12 hexadecimal Fs is a broadcast. c. It's sometimes called a logical address. d. It uniquely identifies both the local network and the individual computer on that network. e. It is composed of 12 bits.

b

Which of the following is true about infrastructure mode in wireless networks? (Choose all that apply.) a. Best used for temporary networks b. Most like a logical bus and physical star c. Uses a central device d. Less secure than ad hoc mode e. Resembles a physical bus and logical ring

b, c

Which of the following is true about the token ring technology? (Choose all that apply.) a. Less expensive than CSMA/CD networks. b. Only the computer with the token can transmit data. c. It uses a physical ring topology. d. It uses RTS/CTS signaling before transmission can occur. e. All computers have equal access to the media.

b, e

LAN technologies use _______ signaling

baseband

TV and cable internet use _____ signaling

broadband

Which of the following describes the arrangement of network cabling between devices? a. Media access method b. Logical topology c. Physical topology d. Networking technology e. None of these choices

c

Which of the following is true of IEEE 802.3an? a. None of these choices b. Uses Category 5 or higher cabling c. Operates only in full-duplex mode d. Best-suited to desktop computers e. Requires two pairs of wires

c

Which of the following is a characteristic of a switched logical topology? (Choose all that apply.) a. It is the most secure logical topology b. Sometimes called a shared-media topology c. Uses a physical star topology d. Creates dynamic connections e. Uses a physical bus topology

c(uses a physical star topology), d (creates dynamic connections)

all devices connected to a logical bus topology network are in the same ________ _______

collision domain

broadband signals move across the medium in the form of ________ electromagnetic or optical waves, rather than ______ ______

continuous, discrete pulses

in baseband signaling, each bit of data is represented by a pulse of electricity on _______ media or _____ on fiber-topic media

copper, light

The physical star topology uses a ___________________ to interconnect computers in a LAN. a. Bus cable a. Access point b. FDDI backbone c. All of these d. Central device

d

What is the main advantage of a point-to-point topology? a. all information is encrypted b. provides redundancy and fault tolerance c. a reliable and fast backbone d. data travels on a dedicated link e. relatively inexpensive

d

What type of logical topology does a Wireless LAN use? a. logical star b. broadcast topology c. hierarchical topology d. logical bus e. switched topology

d

When a Wi-Fi signal passes through a solid object, it is said to attenuate (weaken). This type of signal interference is classified as _____. a. Scattering b. Refraction c. Diffraction d. Absorption e. Reflection

d

When a wireless computer uses a peer-to-peer connection to directly connect to another wireless computer, it is operating in what mode? a. Hot spot b. Wi-Fi c. Personal area network d. Ad hoc e. Infrastructure

d

Which of the following is an advantage of a star topology? (Choose all that apply.) a. Requires less cabling than a bus b. No single point of failure c. It is more secure than a bus d. Allows faster technologies than a bus does e. Centralized monitoring of traffic

d, e

How many channels may be used in North America by Wi-Fi networks operating at the 2.4 GHz frequency range? a. 9 b. 14 c. 7 d. None e. 11

e

How many links would you need in a full mesh configuration if you had 4 nodes? a. 7 b. 5 c. 4 d. 8 e. 6

e

When using UTP cabling, what is the maximum cable length that can be used from the NIC to a hub or switch? a. 1000 meters b. 10 feet c. 100 feet d. 10 meters e. 100 meters

e

Which access method uses a "listen before sending" strategy? a. Polling b. Token bus c. All of these d. Token passing e. CSMA/CD

e

Which best describes a typical wireless LAN? a. Logical star topology b. Logical switching topology c. Logical ring topology d. None of these choices e. Logical bus topology

e

Which technology is likely to be implemented as a point-to-point physical topology? a. Ethernet b. None c. Wi-Fi infrastructure mode d. FDDI e. Wireless bridge

e

In a large network, in which several switches need to be connected together, usually one device is placed at the center, forming a(n) ____________ star.

extended

A network's logical topology takes into account the way that the computers are cabled together and whether they have a central connecting device or not. a. True b. False

false

A switch can operate in full-duplex mode, sending and receiving data at the same time, which may result in collisions. a. True b. False

false

An Ethernet frame is composed of two parts: the header and data portion. a. True b. False

false

CSMA/CD is the media access method used by Ethernet (802.3) and Wi-Fi (802.11) networks. a. True b. False

false

The arrangement of cabling and how the cables connect one device to another in a network is considered the network's logical topology, and the path data travels between computers on a network is considered the network's physical topology. a. True b. False

false

The four most common physical topologies are bus, star, ring, and mesh. a. True b. False

false

The physical bus topology is no longer used because it required extra cable to connect all the computers and required a central device. a. True b. False

false

CRC is the result of a mathematical algorithm computed on the ______ ______. When the destination device receives the frame, the calculation is _____. If the results of this calculation dont match the CRC in the ______, it indicates the data was altered in some way

frame data, repeated, frame

terminators are used in (this topology) networks

physical bus

ad hoc mode is usually used in _______ installations

small

What is the name of the most widely used physical topology in networks today?

star

A network's logical topology often depends on the central device's electronics. a. True b. False

true

A physical star topology has a single point of failure that may cause the entire network to go down. a. True b. False

true