Jeff Rodgers

Module 6 TEST Q/A

A network administrator, while analyzing the network, notices a large number of "runts". What is significant about this? (Choose two.)

A server with high network priority is receiving significant use, overriding normal packet delivery.

A significant number of collisions are occurring, leaving collision fragments.

Corrupt data has been split into small packets allowing the network to function more smoothly.

The network is operating smoothly allowing data to be sent in smaller increments.

Throughput on the network is significantly reduced due to excessive collisions.

What are the possible reasons the MAC layer would be unable to send a frame in sixteen attempts? (Choose two.)

The destination is more than 16 hops away and unreachable.

A physical problem exists on the network.

The destination never received a token and therefore could not return verification of the CRC.

The network administrator assigned the wrong MAC address to the device.

The network is experiencing extremely heavy traffic loads.

The physical layer has not yet reached a state of convergence.

Which statements correctly describe slot time? (Choose two.)

the time period just longer than the longest possible round trip when all options are at their maximum

the time required to send an entire frame through the outgoing port

the minimum spacing between two non-colliding frames

undefined on 10 Gigabit Ethernet

What happens on an Ethernet network after a collision occurs? (Choose three.)

A backoff algorithm is invoked and transmission is stopped.

Devices involved in the collision have a random period of time for priority retransmission of the damaged packet.

The devices involved in the collision release a token indicating the time each station may begin retransmitting.

The devices involved in the collision do not have priority to transmit data.

The devices with data to transmit return to a listen-before-transmit mode.

Transmit work will restart with the reissuance of all data.

 

 

 

 

 

 

Which of the following are the functions of CSMA/CD? (Choose three.)

transmitting and receiving data packets

releasing a token when the network is clear

detecting errors within data packets or on the network

passing a token to each station on the network

decoding data packets and checking them for valid addresses before passing them to the upper layers of the OSI model

Which features describe the Token Ring topology? (Choose two.)

collisionless environment.

non-deterministic.

deterministic

uses CSMA/CD

prone to collisions

Select the statements that correctly describe the Length and Type Ethernet frame fields. (Choose three.)

Both fields, Length and Type, exist in all versions of Ethernet frames.

DIX versions of Ethernet use the field Type.

Early IEEE Ethernet versions used a combined Length/Type field.

Early IEEE Ethernet versions used the field Length.

Later IEEE Ethernet versions use a combined Length/Type field.

Later IEEE Ethernet versions use separate Length and Type fields.

Which of the following is included in the frame address field? (Choose two.)

source IP address

destination IP address

destination subnet mask

source MAC address

destination MAC address

Which options below are field names of a generic frame? (Choose three.)

IP header

voltage reference

data

description

length

frame check sequence

 

 

 

 

 

Which of the following are sublayers of the OSI data link layer? (Choose two.)

Logical Link Control

Logical Layer Control

Media Access Control

Logical Link Communication

Media Access Communication

Physical Access Communication

 

Ethernet standard specifications limit network service interruption. Select the items that describe the standards. (Choose three.)

 

 

minimum segment length

 

 

maximum segment length

 

 

minimum number of stations per segment

 

 

maximum number of stations per segment

 

 

minimum number of repeaters between segments

 

 

maximum number of repeaters between segments

 

 

Which characteristics of Ethernet contribute to its widespread use? (Choose three.)

 

 

ease of maintenance

 

 

collision free technology

 

 

scalability

 

 

low cost of installation

 

 

compatibility with 802.5 standard

 

 

collision avoidance capabilities

 

 

Which statements below are true about Ethernet? (Choose three.)

 

 

addresses the needs of Layer 2 and Layer 3 of the OSI model

 

 

first released as a Xerox proprietary standard

 

 

essentially the same as 802.3 standards

 

 

bandwidth can be increased without changing the underlying technology

 

 

essentially the same as 802.2 standards

 

 

original idea developed at the University of Hawaii

 

 

How are collisions detected on an Ethernet network?

 

 

Stations identify the altered FCS field on the colliding packets.

 

 

The signal amplitude on the networking media increases.

 

 

There is blockage on the network causing no traffic to be detected.

 

 

The signal amplitude on the networking media decreases.

 

 

 

 

 

What is indicated when the length/type frame field value is greater than 0x600?

 

 

DIX formatted frame header

 

 

Ethernet II code used to interpret the frame

 

 

length of frame is 600 bits

 

 

half duplex transmission being utilized

 

 

Why is Ethernet considered very scalable?

 

 

The NIC cards do not need to be changed to increase the bandwidth of the network.

 

 

Bandwidth can be increased without changing the underlying technology.

 

 

Ethernet standards do not need to change as new technologies are introduced.

 

 

Ethernet changes the packet as necessary to move from one link to another.

 

 

What does the "10" in 10Base2 indicate about this version of Ethernet?

 

 

The version uses Base10 numbering within the frames.

 

 

The version operates at a transmission rate of 10 Mbps.

 

 

Frames can travel 10 meters unrepeated.

 

 

The maximum frame length is 10 octets.

 

 

What does the word "Base" indicate in 10Base2?

 

 

The number standard used.

 

 

Baseband signaling is used.

 

 

Only a portion of the transmission medium is used.

 

 

Broadband signaling is used.

 

 

What does the letter "T" indicate in 10BaseT?

 

 

fiber optic cable

 

 

copper unshielded twisted pair

 

 

thicknet coaxial cable

 

 

thinnet coaxial cable

 

 

Which Ethernet data link layer frame comparison is correct?

 

 

higher speed networks require more fields be included in the frame

 

 

the faster speed frame structures are incompatible with the slower speed networks

 

 

the frame structure changes with each higher speed, however, they are compatible with slower speeds

 

 

all speeds of Ethernet have nearly identical frame structures

 

 

 

 

 

 

 

Which of the following would indicate the beginning of the frame?

 

 

flag bit

 

 

start of frame

 

 

frame check sequence

 

 

address field

 

 

Where does the MAC address originate?

 

 

DHCP server database

 

 

configured by the administrator

 

 

burned into ROM on the NIC card

 

 

network configuration on the computer

 

 

included in the creation of the processor chip

 

 

What is the length of a MAC address?

 

 

8 bits

 

 

8 bytes

 

 

24 bits

 

 

24 bytes

 

 

48 bits

 

 

48 bytes

 

 

How is a MAC address represented?

 

 

four groups of eight binary digits separated by a decimal point

 

 

four Base10 digits separated by a decimal point

 

 

six hexadecimal digits

 

 

twelve hexadecimal digits

 

 

twenty-four Base10 digits

 

 

Why is half-duplex mode not permitted on 10 Gigabit Ethernet?

 

 

It was removed from the Ethernet standards as outdated technology.

 

 

Transmission is completed before the sending station can be made aware of any collisions.

 

 

Full-duplex transmission is needed in order to reach 10 Gigabit speeds.

 

 

Full-duplex stations transmit too quickly, blocking half-duplex stations from sending data.

 

 

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