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COM 309 > FINAL > Flashcards

FINAL Flashcards

1
Q

True or False: One of the most important jobs a NIC performs is to take outgoing transmissions from the CPU in serial form and recast them into their parallel equivalents.

A

False

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2
Q

True or False: NICs can have a major influence on network performance.

A

True

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3
Q

What does NIC stand for?

A

Network Interface Cards

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4
Q

True or False: Twisted-Pair Cables are made from fiber-optic glass.

A

False

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5
Q

True or False: 100BaseX represents several Fast Ethernet variations.

A

True

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6
Q

True or False: 10 Gigabit Ethernet operates in full or half but only uses CSMA/CD in half duplex.

A

False

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7
Q

True or False: The MAC controller work at the LLC sublayer by initiating the communications link between nodes, among other functions.

A

True

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8
Q

Which type of cable should you use when the cable will run in false ceilings through which circulating air reaches other parts of the building?

A

Plenum

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9
Q

Twisted-pair cabling uses which of the following to connect to network devices.

A

RJ-45

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10
Q

_______ cable is the most frequently used network cable because it is relatively inexpensive and easy to install.

A

Unshielded twisted-pair

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11
Q

Which of the following supports transmission rates of at least 1 Gbps and operates at 500 MHz frequency?

A

Cat 6a UTP

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12
Q

A _____________ cable consists of a single cable sheath that contains fibers and copper cables in different combinations for different implementations.

A

Hybrid fiber/coax

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13
Q

A(n) ________ is a device that can transmit and receive, such as transmitting and receiving signals on a communications cable.

A

Transceiver

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14
Q

_________ means that the NIC and network equipment are set up so that they can transmit and receive data, but not at the same time.

A

Half-Duplex

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15
Q

Which of the following is software installed on an operating system that is used to communicate with the NIC and manages how frames are sent?

A

Driver

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16
Q

Which of the following is not a standard network speed?

a. 100 Mbps
b. 80 Gbps
c. 10 Mbps
d. 40 Gbps

A

8- Gbps

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17
Q

Which of the following is the benefit of fiber-optic media?

a. Reduce RFI
b. Reduce EMI
c. Long distance communications
d. All of the above

A

All of the above

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18
Q

True or False: A bridge does not have the ability to look at frame addresses.

A

False

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19
Q

True or False: Unlike bridges, routers can direct packets to specific networks.

A

True

20
Q

True or False: Routing Information Protocol (RIP) can determine the best path to take when different options are available, such as Fast Ethernet versus Gigabit Ethernet.

A

False

21
Q

True or False: Unlike a cable modem user, a DSL modem user employs the full bandwidth of his or her line.

A

True

22
Q

The method used by a repeater to close down a segment is called ____.

A

Partitioning

23
Q

Which of the following is the physical topology when a hub is used to connect network nodes?

a. Bus
b. Mesh
c. Star
d. Ring

A

Star

24
Q

Networks that contain two or more bridges use the ____ algorithm to bridge frames and to set up a system of checks performed by bridges.

A

Spanning Tree

25
Q

____ routes are routes set up by the network administrator and specify fixed paths between two routers.

A

Static

26
Q

____ sends only the portion of the routing table that pertains to its most immediate router links, which is called the “link-state routing message.”

A

OSPF

27
Q

____ provide bridging capacity along with the ability to increase the bandwidth on existing networks.

A

Switches

28
Q

Which of the following typically refers to a software or hardware interface that enables two different types of networked systems or software to communicate?

A

Gateway

29
Q

____ communications are continuous bursts of data controlled by a clock signal that starts each burst.

A

Synchronous

30
Q

A(n) ____ communicates using upstream and downstream frequencies (channels) that are already allocated by a cable service.

A

Cable Modem

31
Q

Which of the following combines several types of WAN communications into one device and can sometimes be expanded or reconfigured for changes in WAN services?

A

Access Server

32
Q

A(n) ____________________ connects two or more cable segments and retransmits any incoming signal to all other segments.

A

Repeater

33
Q

A bridge will __________ when a bridge does not know the destination segment and transmits the frame to all segments except the source segment.

A

Send to segments except the one it comes from

34
Q

A bridge will __________ when a bridge does know the destination segment and transmits the frame to all segments except the source segment.

A

Forward to the destination

35
Q

A bridge will __________ when a bridge knows the destination belongs to the same segment.

A

Drops the data

36
Q

True or False: Line-of-sight radio transmissions have an advantage of being able to go through tall land masses.

A

False

37
Q

True or False: Devices for the 802.11a standard are the most widespread of the 802.11 wireless standards.

A

False

38
Q

Which of the following technologies is used for short distance wireless communications such as within an office, and is harder to tap into without someone noticing?

a. Gamma Ray
b. Microwave
c. Infrared
d. Ultraviolet

A

Infrared

39
Q

One ____ represents a radiated alternating current or emission of one cycle per second.

A

Hertz

40
Q

Which of the following uses datagrams and wireless packet switching to send data through radio waves?

a. Packet Radio
b. CB Radio
c. Amateur Radio
d. Digital Radio

A

Packet Radio

41
Q

Which of the following is a device that sends out and picks up radio waves and is used by access points and wireless NICs?

a. Wireless Modem
b. Receiver
c. Transmitter
d. Antenna

A

Antenna

42
Q

In which of the following system authentication methods can any two stations authenticate with each other?

a. Open
b. Selective
c. Closed
d. Binary

A

Open

43
Q

Which of the following is a value that defines a logical network for all devices that belong to it?

a. WEP Encryption Key
b. Preshared Key
c. SSID
d. Shared Key

A

SSID

44
Q

Which of the following is a wireless topology that employs two or more access points to form a multiple-cell wireless LAN?

a. IBSS
b. IAPP
c. ESS
d. Star

A

ESS

45
Q

Which of the following orbit at a distance of between 435 and 1000 miles above the Earth’s surface and are used for both broadband computer and satellite phone communications?

a. Lower Earth Orbit
b. Terrestrial Satellites
c. WiMAX Satellites
d. Geosynchronous

A

Lower Earth Orbit

46
Q

An area with public wireless access is called a ____, which is simply a location that provides a public access point to users.

A

Hotspot

COM 309 (6 decks)

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