Deck 2: Fundamentals of Ethernet Lans

Question 1

Which of the following algorithms is used to control network access and handle collisions on the shared Ethernet network?

A) CSMA/CA
B) DCAP
C) CSMA/CD
D) CLNP

Answer 1

CSMA/CD

Question 2

When a collision occurs on a shared Ethernet network, what is the first step in recovery for the two computers in question?

A) Send a jamming signal.
B) Resend the last frame right away.
C) Wait for the other computer to finish.
D) Do nothing until the line clears.

Answer 2

Send a jamming signal.

Question 3

What is the name of a LAN device that provides many physical ports into which Ethernet cables can be connected?

A) Ethernet bridge
B) Ethernet router
C) Ethernet repeater
D) Ethernet switch
E) Ethernet concentrator

Answer 3

Ethernet switch

Question 4

Which IEEE standard defines the use of radio waves to communicate between wireless LAN nodes?

A) IEEE 802.3
B) IEEE 802.2
C) IEEE 802.16
D) IEEE 802.5
E) IEEE 802.11

Question 5

What is the longest copper cable length supported by the IEEE 802.3u FastEthernet standard?

A) 100 meters
B) 1 kilometer
C) 100 feet
D) 180 meters
E) 180 feet

Question 6

What is the longest copper cable length supported by the IEEE 802.3an 10 Gigabit Ethernet standard?

A) 100 meters
B) 1 kilometer
C) 100 feet
D) 180 meters
E) 180 feet

Question 7

What is the name of the data unit that is sent and received at the Ethernet data link layer?

A) Segment
B) Frame
C) Bit
D) Packet
E) Section

Question 8

What term is used to describe a set of rules that are followed to ensure that devices can talk to each other and understand what each device is saying?

A) Encryption scheme
B) Data format
C) Encoding scheme
D) Language agreement
E) Communications protocol

Question 9

Why are the individual wires within a UTP cable twisted together?

A) To reduce electrical shorts
B) To reduce electrical opens
C) To increase crosstalk
D) To reduce crosstalk
E) To increase electrical shorts

Question 10

On a LAN RJ-45 connector, what name is given to the eight physical connections that make contact when connected?

A) Threads
B) Wires
C) Strands
D) Crimps
E) Pins

Question 11

What is the name of the device in a PC (or server) that connects it to a LAN network?

A) NIC
B) DAC
C) PCI port
D) SATA port
E) USB port

Question 12

When connecting a wire to a host FastEthernet interface, which pins are used for communications?

A) Pins 1 and 2 to receive
B) Pins 1 and 2 to transmit
C) Pins 3 and 6 to receive
D) Pins 3 and 6 to transmit
E) Pins 1 and 2 for receive
F) Pins 7 and 8 for transmit

Question 13

Assuming Auto-MDIX is not supported, which of these devices would require a straight-through cable when connecting to an Ethernet switch?

A) Switch
B) Hub
C) Bridge
D) Router
E) Host (PC)

Question 14

Assuming Auto-MDIX is not supported, which of these devices would require a crossover cable when connecting to a router?

A) Switch
B) Hub
C) Bridge
D) Router
E) Host (PC)

Question 15

Which field in the IEEE 802.3 Ethernet header provides a method for the receiving NIC to determine whether a frame experienced frame errors during transmission?

A) FCS
B) SFD
C) CRC
D) Hash
E) Pad

Question 16

An Ethernet address is also commonly referred to as a ________ address.

A) CAM
B) MAC
C) IP
D) Host
E) Unicast

Question 17

Which part of the Ethernet address is assigned to vendors to identify the equipment manufactured by them?

A) First two bytes
B) Last byte
C) First three bytes
D) Last three bytes
E) Second and third bytes

Question 18

Which part of a fiber optic cable is at the very center of the cable?

A) Buffer
B) Strengthener
C) Cladding
D) Core
E) Jacket

Question 19

A light source for a fiber optic cable is known as which of the following?

A) Optical transmitter
B) Light transmitter
C) Optical retina
D) Cladding

Question 20

Which type of fiber optic cabling improves the maximum distances over UTP and uses a less expensive transmitter compared to its counterpart?

A) Multimode
B) Single-mode

Question 21

Which of the following cable types has the furthest approximate max distance?

A) UTP
B) Multimode
C) Single-mode

Question 22

Which of the following cable types is the least expensive?

A) UTP
B) Multimode
C) Single Mode
D) They all cost approximately the same