Deck 12: Lan Architecture and Infrastructure

Question 1

Twisted pair wires are immune from all interference due to electromagnetic coupling because of the twisting of the wires.

Answer 1

False

Question 2

A LAN consists of a shared transmission medium and a set of hardware and software for interfacing devices to the medium and regulating the orderly access to the medium.

Answer 2

True

Question 3

One of the challenges when adopting a top down design approach to networks is that the company must understand the individual needs of each department and be responsive.

Answer 3

True

Question 4

LAN protocol architectures are more concerned with cabling infrastructure and less concerned with providing services needed by network attached devices to share the LAN transmission medium.

Question 5

The fact that signal strength falls off with distance is called ________________.

A)bandwidth
B)attenuation
C)resistance
D)propagation

Question 6

Which of following is NOT one of the designs that determines data rate and distance?

A)the number of senders
B)the number of receivers
C)transmission impairment
D)bandwidth

Question 7

One of the advantages of having a bottom up approach to building a LAN is that individual managers are very close to the group and therefore understand the needs of the department and can respond quickly.

Question 8

Which of the following is NOT one of the distinguishing characteristics for optical fiber cables compared with twisted pair or coaxial cables?

A)greater capacity
B)lower attenuation
C)electromagnetic isolation
D)heavier weight

Question 9

The major difference between Category 3 UTP and Category 5 UTP is that the latter uses a larger sized wire for the conductors.

Question 10

The requirement for networking capability within the individual building is just as strong as the requirement for wide area networking.

Question 11

The capacity of optical fiber cable is more than 1000 times greater than coaxial cables.

Question 12

One rationale for not employing Local Area Network (LAN) technology for an entire premise is because there are differing levels of equipment,such as PCs,servers,and mainframes.

Question 13

Coaxial cable is less susceptible to electromagnetic interference, but more expensive,when compared with twisted pair cables.

Question 14

Which of the following is NOT one of the typical characteristics of back-end networks?

A)high data rate
B)high-speed interface
C)distributed access
D)extended distance

Question 15

Guided media provide a physical path along which the signals are propagated; these include twisted pair,coaxial cable,and optical fiber.

Question 16

Even for large companies,isolated personal computers are often more than sufficient for current computer based tasks.

Question 17

Problems with using a single Local Area Network (LAN)to interconnect devices on a premise include:

A)insufficient reliability,limited capacity,and inappropriate network interconnection devices
B)insufficient reliability,limited capacity,and limited distances
C)insufficient reliability,limited distances,and inappropriate network interconnection devices
D)limited distances,limited capacity,and inappropriate network interconnection devices

Question 18

Back-end networks are used in situations where a few large computers must be connected for low-volume data transfers.

Question 19

A Storage Area Network (SAN)is a network specifically designed to allow specific servers the ability to share local storage devices with each other.

Question 20

Traditionally,twisted pair has been the workhorse for communications of all sorts.

Question 21

Drawbacks to a single-LAN strategy are: reliability,capacity,and _________.

Question 22

A design factor relating to the transmission medium and the signal to determine the data rate and distance is:

A)bandwidth
B)transmission impairments
C)interference
D)all of the above

Question 23

A ___________ is a separate network to handle storage needs.

A)NAN
B)LAN
C)SAN
D)MAC

Question 24

A service provided as an alternative for attached devices using LLC is:

A)unacknowledged connectionless service
B)connection-mode service
C)acknowledged connectionless service
D)all of the above

Question 25

Which of the following is NOT one of the characteristics of a building wiring scheme using a structured cabling system?

A)the scheme refers to the wiring within a commercial building
B)the scheme must accommodate the need for separate cabling systems for each of data,voice,and video applications
C)the scope of the system includes cabling to support of all types of information transfer,including voice,LANs,video and image
Transmission,and other forms of data transmission
D)the cable layout is designed to encompass distribution to all work areas within the building,so that relocation of equipment does not require rewiring but simply requires plugging the equipment into a preexisting outlet in the new location

Question 26

Which of the following is a characteristic of a backend network?

A)high data rate
B)distributed access
C)limited distance
D)all of the above

Question 27

A __________ can be described as a separate network of storage devices that are physically removed from,but still connected to,the network.

Question 28

In a data transmission system,the __________ is the physical path between transmitter and receiver.

Question 29

In most _______________ protocols,the data link protocol entity is responsible not only for detecting errors using the CRC,but for recovering from those errors by retransmitting damaged frames.

A)data link control
B)logical link control
C)media access control
D)all of the above

Question 30

Sometimes called computer room networks,__________ networks are used to interconnect large systems such as mainframes,supercomputers,and mass storage devices that typically need to transfer large volumes of data between one another.

Question 31

With __________,the waves are guided along a solid medium,such as copper twisted pair,copper coaxial cable,or optical fiber.

Question 32

The kinds of data processing equipment to be supported in a typical business organization can be grouped into three categories: personal computers and workstations,server farms,and _________.

Question 33

The atmosphere and outer space are examples of unguided media,which provide a means of transmitting electromagnetic signals but do not guide them; this form of transmission is usually referred to as ___________.

Question 34

The lowest layer of the IEEE 802 reference model corresponds to the ____________ of the OSI model and includes such functions as encoding / decoding of signals and bit transmission / reception.

A)physical layer
B)logic layer
C)link layer
D)control layer

Question 35

When examining a MAC frame of data,starting with the first bit,which of the following describes the order of the various headers found in the frame?

A)MAC,LLC,IP,and TCP
B)TCP,IP,MAC,and LLC
C)TCP,IP,LLC,and MAC
D)MAC,IP,TCP,and LLC

Question 36

Twisted pair comes in two varieties: unshielded and _________.

Question 37

Cables and associated connecting hardware whose transmission characteristics are specified up to _________ fall into Category 5 UTP cabling.

A)50 MHz
B)100 MHz
C)150 MHz
D)200 MHz

Question 38

A factory ________ should be: of high capacity,able to handle a variety of data traffic,capable of having a large geographic footprint,highly reliable,and able to specify and control transmission delays.

Question 39

The function of a __________ protocol is to control access to the transmission medium and to provide an orderly and efficient use of that capacity.

A)LLC
B)SAN
C)MAC
D)MAN

Question 40

Two different types of light source are used in fiber optic systems: LED and

Question 41

Ethernet requires that each segment be no more than ___________ in length, including the installed cabling and patch cables at either end,for 10-Mbps and 100-Mbps transmissions.

Question 42

To aid in the development of cabling plans,standards have been issued that specify the cabling types and layout for office,data center,and apartment buildings; these standards are referred to as __________.

Question 43

Higher-level data,such as an IP datagram,are passed down to LLC,which appends control information as a header,creating an LLC ___________.

Question 44

__________ is a common link protocol for all LANs and specifies the mechanisms for addressing stations across the medium and for controlling the exchange of data between two users.

Question 45

__________ are the termination points for all of the cabling and where the networking equipment will be located.