Which of the following are specified by
IEEE standards as 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
2
In an Ethernet LAN, how does the NIC know
when it can transmit data?
An Ethernet NIC
transmits data as soon as the frame is received.
An Ethernet NIC
transmits data as soon as the NIC receives a
token.
An Ethernet NIC
transmits data when it senses a collision.
An Ethernet NIC
transmits data after listening for the absence of a
signal on the media.
3
Refer to the exhibit. Host A is
communicating with host F. What happens to a frame sent
from host A to host F as it travels over the Ethernet
segments?
The frame format is
modified as it passes through each switch.
The frame format
remains the same across each Ethernet segment.
The frame format is
modified as the media speed changed at switch B and
switch E.
The frame format is
modified as the media material changes between copper
and fiber at switch C and switch
D.
4
Which of the following are Fast Ethernet
technologies? (Choose two.)
100BASE-5
100BASE2
1000BASE-F
100BASE-FX
100BASE-TX
5
Refer to the exhibit. The small office
network shown in the exhibit consists of four computers
connected through a hub. Which configuration would cause
collisions and errors on the network?
autonegotiation
FastEthernet
peer-to-peer shared
resources
administratively
configured full duplex
6
A router has an Ethernet, Token Ring,
serial, and ISDN interface. Which interfaces will have a
MAC address?
serial and ISDN
interfaces
Ethernet and Token Ring
interfaces
Ethernet and ISDN
interfaces
Token Ring and serial
interfaces
7
Refer to the exhibit. All hosts are in
listen mode. Host 1 and Host 4 both transmit data at the
same time. How do the hosts respond on the network?
(Choose two.)
Hosts 1 and 4 may be
operating full duplex so no collision will exist.
The hub will block the
port connected to Host 4 to prevent a collision.
After the end of the
jam signal, a backoff algorithm is invoked.
Hosts 1 and 4 are
assigned shorter backoff values to provide them priority
to access the media.
If a host has data to
transmit after the backoff period of that host, the host
checks to determine if the line is idle, before
transmitting.
8
Which statements describe Gigabit Ethernet
technology? (Choose two.)
operates at 100 Mbps
typically used for
backbone cabling
requires shielded
twisted-pair cabling
can be implemented over
copper and fiber
primarily used between
workstations option
9
Which media types can be used in an
implementation of a 10BASE-T network? (Choose
three.)
Category 5 UTP
Category 5e UTP
Category 3 UTP
coaxial cable
multi-mode fiber
single mode
fiber
10
What are three functions of a NIC in a PC?
(Choose three.)
A NIC connects the PC
to the network media.
A NIC detects
collisions on the Ethernet segment.
A NIC checks the
formatting of data before it is transmitted.
A NIC passes the
contents of selected frames to the upper OSI
layers.
A NIC acknowledges and
retransmits data that was not received properly.
A NIC discards frames
when the destination IP address does not match the local
host.
11
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
12
Refer to the exhibit. The switch and
workstation are administratively configured for
full-duplex operation. Which statement accurately
reflects the operation of this link?
No collisions will
occur on this link.
Only one of the devices
can transmit at a time.
The switch will have
priority for transmitting data.
The devices will
default back to half duplex if excessive collisions
occur.
13
Which two devices can provide full-duplex
Ethernet connections? (Choose two.)
hub
modem
repeater
NIC
Layer 2
switch
14
What is the maximum distance that 10BASE-T
will transmit data before signal attenuation affects the
data delivery?
100 meters
185 meters
300 meters
500
meters
15
In which two layers of the OSI model does
Ethernet function? (Choose two.)
application
session
transport
network
data link
physical
16
At which OSI layer do the differences
between standard Ethernet, Fast Ethernet and Gigabit
Ethernet occur?
physical layer
data link layer
network layer
transport
layer
17
At what layer of the OSI model does a MAC
address reside?
1
2
3
4
7
18
Which of the following Ethernet
technologies are considered legacy Ethernet? (Choose
three.)
10BASE2
10BASE5
10BASE-T
100BASE-T
100BASE-FX
100BASE-TX
19
Which statement describes how CSMA/CD on
an Ethernet segment manages the retransmission of frames
after a collision occurs?
The first device to
detect the collision has the priority for
retransmission.
The device with the
lowest MAC address determines the retransmission
priority.
The devices on the
network segment hold an election for priority to
retransmit data
The devices
transmitting when the collision occurs DO NOT have
priority for
retransmission.
20
How does 1000BASE-T use the UTP wire pairs
to accomplish transmission?
two pairs are used to
transmit and two pairs are used to receive
one pair is used to
transmit, one pair is used to receive, one pair is used
for clocking, and one pair is used for error
correction
all four pairs are used
in parallel by both hosts to transmit and receive
simultaneously
two pairs of wires are
used as in 10BASE-T and
100BASE-TX
