1. Which options are properties of
contention-based media access for a shared media? (Choose three.)
non-deterministic
less
overhead
one station transmits at a time
collisions
exist
devices must wait their turn
token passing
2. What
is a primary purpose of encapsulating packets into frames?
provide routes across the internetwork
format the data for presentation to the user
facilitate
the entry and exit of data on media
identify the services to which transported data is associated
3. Refer to the exhibit. How many unique CRC calculations will take
place as traffic routes from the PC to the laptop?
1
2
4
8
16
4. What
is true concerning physical and logical topologies?
The logical topology is always the same as the physical topology.
Physical topologies are concerned with how a network transfers frames.
Physical signal paths are defined by Data Link layer protocols.
Logical
topologies consist of virtual connections between nodes.
5. Refer to the exhibit. Assuming that the network in the exhibit
is converged meaning the routing tables and ARP tables are complete, which MAC
address will Host A place in the destination address field of Ethernet frames
destined for http://www.server?
00-1c-41-ab-c0-00
00-0c-85-cf-65-c0
00-0c-85-cf-65-c1
00-12-3f-32-05-af
6. What
are three characteristics of valid Ethernet Layer 2 addresses? (Choose three.)
They
are 48 binary bits in length.
They
are considered physical addresses.
They
are generally represented in hexadecimal format.
They consist of four eight-bit octets of binary numbers.
They are used to determine the data path through the network.
They must be changed when an Ethernet device is added or moved within the
network.
7. Refer to the exhibit. A
frame is being sent from the PC to the laptop. Which source MAC and IP
addresses will be included in the frame as it leaves RouterB? (Choose two.)
source MAC – PC
source MAC – S0/0 on RouterA
source
MAC – Fa0/1 on RouterB
source
IP – PC
source IP – S0/0 on RouterA
source IP – Fa0/1 of RouterB
8. What
determines the method of media access control? (Choose two.)
network layer addressing
media
sharing
application processes
logical
topology
intermediary device function
9. What
is the purpose of the preamble in an Ethernet frame?
is used as a pad for data
identifies the source address
identifies the destination address
marks the end of timing information
**is
used for timing synchronization with alternating patterns of ones and zeros
10. What
statements are true regarding addresses found at each layer of the OSI model?
(Choose two.)
Layer
2 may identify devices by a physical address burned into the network card
Layer 2 identifies the applications that are communicating
Layer
3 represents a hierarchical addressing scheme
Layer 4 directs communication to the proper destination network
Layer 4 addresses are used by intermediary devices to forward data
11. Which
statements describe the logical token-passing topology? (Choose two.)
Network usage is on a first come, first serve basis.
Computers
are allowed to transmit data only when they possess a token.
Data from a host is received by all other hosts.
Electronic
tokens are passed sequentially to each other.
Token passing networks have problems with high collision rates.
12. Which
sublayer of the data link layer prepares a signal to be transmitted at the
physical layer?
LLC
MAC
HDLC
NIC
13. What
is true regarding media access control? (Choose three.)
Ethernet
utilizes CSMA/CD
defined
as placement of data frames on the media
contention-based access is also known as deterministic
802.11 utilizes CSMA/CD
Data
Link layer protocols define the rules for access to different media
controlled access contains data collisions
14. What
is a characteristic of a logical point-to-point topology?
The nodes are physically connected.
The physical arrangement of the nodes is restricted.
The
media access control protocol can be very simple.
The data link layer protocol used over the link requires a large frame header.
15. What
two facts are true when a device is moved from one network or subnet to
another? (Choose two.)
The Layer 2 address must be reassigned.
The default gateway address should not be changed.
The
device will still operate at the same Layer 2 address.
Applications and services will need additional port numbers assigned.
The
Layer 3 address must be reassigned to allow communications to the new network.
16. What
is a function of the data link layer?
provides the formatting of data
provides end-to-end delivery of data between hosts
provides delivery of data between two applications
provides
for the exchange data over a common local media
17. Which
three factors should be considered when implementing a Layer 2 protocol in a
network? (Choose three.)
the Layer 3 protocol selected
the
geographic scope of the network
the PDU defined by the transport layer
the
physical layer implementation
the
number of hosts to be interconnected
18. What
is the primary purpose of the trailer in a data link layer frame?
define the logical topology
provide media access control
support
frame error detection
carry routing information for the frame
19. A
network administrator has been asked to provide a graphic representation of
exactly where the company network wiring and equipment are located in the
building. What is this type of drawing?
logical topology
physical
topology
cable path
wiring grid
access topology
20.Refer to the exhibit. Which statement describes the media access
control methods that are used by the networks in the exhibit?
All three networks use CSMA/CA
None of the networks require media access control.
Network
1 uses CSMA/CD and Network 3 uses CSMA/CA.
Network 1 uses CSMA/CA and Network 2 uses CSMA/CD.
Network 2 uses CSMA/CA and Network 3 uses CSMA/CD.
