Deck 4: Network Transmission Equipment

Question 1

Routers can prevent network slowdowns and broadcast storms.

Answer 1

True

Question 2

A(n)USB is a standard for connecting all kinds of peripherals, such as printers, modems, and tape drives, and in many cases is replacing the use of traditional parallel and serial ports.

Answer 2

True

Question 3

The MAC controller unit works at the OSI ____ layer.

A)Data Link
B)Physical
C)Transport
D)Both A and B.

Answer 3

A

Question 4

Different NICs are used for different media and transport methods.

Question 5

When a PC is connected to a modem, the data transfer speed of the PC is the data communications equipment communications rate.

Question 6

A(n)broadcast flood is the saturation of network bandwidth by excessive transmissions from devices attached to the network, which can result in a virtual standstill of traffic.

Question 7

Hubs offer the ability to segment network traffic, limiting traffic to those networks where it belongs.

Question 8

The M in MNP stands for modem.

Question 9

Intelligent bridges are used to join distant networks.

Question 10

A cable segment is one cable run within the IEEE specifications.

Question 11

It is not important to become familiar with older-style networks, because they are almost obsolete.

Question 12

The link-state routing message is associated with RIP.

Question 13

A global router enables networks to be connected into WANs over long distances, say from New York to Los Angeles.

Question 14

The most traditional type of gateway is a network device that translates one type of protocol to another that has a very different structural composition.

Question 15

Routers, like bridges, are transparent to other network nodes, such as workstations and servers.

Question 16

Driver encoding means that a digital signature is placed in the driver.

Question 17

A ____ is a device that can transmit and receive, such as transmitting and receiving signals on a communications cable.

A)multiplexer
B)transmitter
C)transceiver
D)portal

Question 18

A channel bank is a large-scale multiplexer that aggregates telecommunications channels in a centralized location such as a POP.

Question 19

Local routers are used to segment network traffic and to enforce security.

Question 20

Unmanaged hubs are best for networks with a large number of nodes.

Question 21

A ____ is a pathway inside the computer that is used to transfer information to the CPU or to peripherals attached to the computer.

A)channel
B)circuit
C)bus
D)lobe

Question 22

Switches operate at the OSI ____ layer.

A)Network
B)Data Link
C)Physical
D)Transport

Question 23

Lobe cables are used in connection with ____.

A)MAUs
B)repeaters
C)brouters
D)multiplexers

Question 24

LAN-based switches are not used for ____.

A)Ethernet
B)FDDI
C)ATM
D)None of the above.

Question 25

Bridges operate at the OSI ____ layer.

A)Network
B)Data Link
C)Physical
D)Both B and C.

Question 26

The bridge with the lowest MAC address becomes the ____ bridge.

A)primary
B)root
C)super
D)main

Question 27

A wireless NIC generally communicates in one of ____ modes.

A)2
B)3
C)4
D)5

Question 28

In ____ switching, the frame is not forwarded until it is completely received.

A)Cut-through
B)Static
C)Local
D)Store-and-forward

Question 29

Hubs are not available for ____ technology.

A)FDDI
B)token ring
C)ISDN
D)None of the above.

Question 30

A bridge does not perform which function?

A)converting
B)learning
C)filtering
D)forwarding

Question 31

Routers operate at the OSI ____ layer.

A)Network
B)Data Link
C)Physical
D)Transport

Question 32

Metrics are calculated by ____.

A)MAUs
B)repeaters
C)routers
D)multiplexers

Question 33

____ hubs work at both the OSI Physical and Data Link layers.

A)Chassis
B)Intelligent
C)Stackable
D)Workgroup

Question 34

A MAU operates at the OSI ____ layer.

A)Network
B)Data Link
C)Physical
D)Both B and C.

Question 35

____ is a modern bus design that supports 32-bit and 64-bit communications.

A)PCI
B)MCA
C)EISA
D)ISA

Question 36

Which is not true about the OSPF protocol?

A)It uses only hop count as its metric.
B)The router sends only the portion of the routing table that pertains to its most immediate router links.
C)Only updated routing table information is shared among routers.
D)None of the above.

Question 37

A(n)____ hub regenerates, retimes, and amplifies the signal each time it passes through to the next node.

A)intelligent
B)smart
C)active
D)routing

Question 38

Which is a disadvantage of repeaters?

A)They are expensive.
B)They can create an excessive amount of traffic on an already busy network.
C)They are complex and difficult to install.
D)None of the above.

Question 39

____ switching is now the most popular form of switching.

A)Cut-through
B)Dynamic
C)Local
D)Store-and-forward

Question 40

A router operates at the OSI ____ layer.

A)Network
B)Transport
C)Physical
D)Session

Question 41

____ switches are the best choice when implementing VLANs, since they reduce management overhead.

A)Dedicated
B)Dynamic
C)Routing
D)Virtual

Question 42

____ provide a single unit in which to combine all types of telecommunications connectivity, including modems.

A)Multiplexers
B)Access servers
C)Remote routers
D)GAPs

Question 43

Class I repeaters are faster than Class II repeaters.

Question 44

Bridges are protocol independent.

Question 45

You would not use a gateway to ____.

A)connect networks with different architectures
B)convert message formats from one format to another
C)link a host computer to a LAN
D)None of the above.

Question 46

Token ring bridges use source routing to forward packets on a network.

Question 47

A router is inherently faster than a bridge.

Question 48

Which is not an electrical switching method employed by multiplexers?

A)TDMA
B)statistical multiple access
C)WDM
D)FDMA

Question 49

The MNP ____ provides for cell phone transmission.

A)Class 2
B)Class 5
C)Class 6
D)Class 10

Question 50

The P in PBX stands for ____.

A)point
B)private
C)primary
D)packet

Question 51

Channel banks were first used in voice applications.

Question 52

Multiplexers work at the OSI ____ layer.

A)Network
B)Data Link
C)Physical
D)Both B and C.

Question 53

Which is not a common type of external modem connector?

A)DB-9
B)DB-25
C)PS/2
D)RJ-45

Question 54

A ____ does not include a switchboard.

A)PBX
B)PAX
C)PABX
D)None of the above.

Question 55

____ can be equipped with intelligence to help in collecting network data and for centralizing network management.

A)Hubs
B)Bridges
C)Routers
D)All of the above.

Question 56

Which is not true about DSL?

A)The DSL user employs the full bandwidth of his or her line.
B)It is a digital technology that works over copper wire.
C)It uses a line shared by other users.
D)None of the above.

Question 57

X.25, ISDN, and frame relay use ____ for packet-switched communications.

A)routers
B)multiplexers
C)channel banks
D)virtual circuits

Question 58

The DOCSIS standards are associated with ____.

A)cable modems
B)remote routers
C)access servers
D)PBXs

Question 59

Multiplexers are simply ____.

A)routers
B)repeaters
C)hubs
D)switches

Question 60

When a repeater retransmits a signal along more than one additional cable segment, it is called a multitransporter.

Question 61

____________________ is software that is stored on a chip, such as a ROM chip.

Question 62

When referencing Class I and Class II repeaters, a(n)____________________ refers to two segments connected by one or more repeaters.

Question 63

All modern channel banks have routing tables that are automatically maintained.

Question 64

What is a brouter? When is one used?

Question 65

The figure above shows a(n)______________________________ frame in bytes.

Question 66

When is the spanning tree algorithm used? What are the two goals of this algorithm?

Question 67

Cable modems communicate using only downstream frequencies that are already allocated by the cable service.

Question 68

OSPF stands for _________________________.

Question 69

Which technology discussed in this chapter is said to operate in promiscuous mode? What does promiscuous mode mean?

Question 70

A(n)____________________ converts a computer's outgoing digital signal to an analog signal that can be transmitted over a telephone line.

Question 71

With repeaters, what does the concept of partitioning mean? When is partitioning performed?

Question 72

The advantage of ____________________ communications is that currently unallocated bandwidth can be allocated to you, even for a millisecond or two, when you are downloading a large file, for example.

Question 73

Internal cable modems are more common than external cable modems.

Question 74

A(n)____________________ is the movement of a frame or packet, point-to-point, from one network to the next.

Question 75

What is a VLAN?

Question 76

What is the difference between half- and full-duplex?

Question 77

A(n)____________________ is software or hardware that secures data from being accessed outside a network and that can also prevent data from leaving the network through an inside source.

Question 78

List and briefly discuss the types of routing.

Question 79

IDSN lines require the use of a(n)____________________ to connect to a PC.

Question 80

The W in WDM stands for ____________________.