1. In the graphic, Host A has reached 50% completion in sending
a 1 KB Ethernet frame to Host D when Host B wishes to transmit its own frame to
Host C. What must Host B do?
• Host B can transmit immediately since it is connected on its own cable
segment.
• Host B must wait to receive a CSMA transmission from the hub, to signal its
turn.
• Host B must send a request signal to Host A by transmitting an interframe
gap.
• Host B must wait until it is certain that Host A has completed
sending its frame.
2. Ethernet operates
at which layers of the OSI model? (Choose two.)
• Network layer
• Transport layer
• Physical layer
• Application layer
• Session layer
• Data-link layer
3. Which of the following describe interframe spacing? (Choose two.)
• the minimum interval, measured in bit-times, that any station must
wait before sending another frame.
• the maximum interval, measured in bit-times, that any station
must wait before sending another frame.
• the 96-bit payload padding inserted into a frame to achieve a legal frame
size
• the 96-bit frame padding transmitted between frames to achieve proper
synchronization
• the time allowed for slow stations to process a frame and prepare
for the next frame.
• the maximum interval within which a station must send another
frame to avoid being considered unreachable
4. What three primary functions does data link layer
encapsulation provide? (Choose three.)
• addressing
• error detection
• frame delimiting
• port identification
• path determination
• IP address resolution
5. When a collision occurs in a network using CSMA/CD, how do
hosts with data to transmit respond after the backoff period has expired?
• The hosts return to a listen-before-transmit mode. <---
• The hosts creating the collision have priority to send data.
• The hosts creating the collision retransmit the last 16 frames.
• The hosts extend their delay period to allow for rapid transmission.
6. What are three functions of the upper data link sublayer in
the OSI model? (Choose three.)
• recognizes streams of bits
• identifies the network layer protocol.
• makes the connection with the upper layers.
• identifies the source and destination applications
• insulates network layer protocols from changes in physical
equipment.
• determines the source of a transmission when multiple devices
are transmitting
7. What does the IEEE 802.2 standard represent in Ethernet
technologies?
• MAC sublayer
• Physical layer
• Logical Link Control sublayer
• Network layer
8. Why do hosts on an Ethernet segment that experience a collision
use a random delay before attempting to transmit a frame?
• A random delay is used to ensure a collision-free link.
• A random delay value for each device is assigned by the manufacturer.
• A standard delay value could not be agreed upon among networking device
vendors.
• A random delay helps prevent the stations from experiencing
another collision during the transmission.
9. Refer to the exhibit. Which option correctly matches the
frame field type with the contents that frame field includes?
• header field - preamble and stop frame
• data field - network layer packet
• data field - physical addressing
• trailer field - FCS and SoF
10. Host A has an IP address of 172.16.225.93 and a mask of
255.255.248.0. Host A needs to communicate with a new host whose IP is
172.16.231.78. Host A performs the ANDing operation on the destination address.
What two things will occur? (Choose two.)
• Host A will change the destination IP to the IP of the nearest router and
forward the packet.
• Host A will broadcast an ARP request for the MAC of its default gateway.
• A result of 172.16.225.0 will be obtained.
• Host A will broadcast an ARP request for the MAC of the
destination host.
• A result of 172.16.224.0 will be obtained.
• A result of 172.16.225.255 will be obtained.
11 Which of the following is a drawback of the CSMA/CD access
method?
• Collisions can decrease network performance.
• It is more complex than non-deterministic protocols.
• Deterministic media access protocols slow network performance.
• CSMA/CD LAN technologies are only available at slower speeds than other LAN
technologies.
12. Ethernet operates at which layer of the TCP/IP network
model?
• application
• physical
• transport
• internet
• data link
• network access
13. What is the primary purpose of ARP?
• translate URLs to IP addresses
• resolve IPv4 addresses to MAC addresses
• provide dynamic IP configuration to network devices
• convert internal private addresses to external public addresses
14. 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.
15. Refer to the exhibit. Host_A is attempting to contact Server_B. Which
statements correctly describe the addressing Host_A will generate in the
process? (Choose two.)
• A packet with the destination IP of Router_B.
• A frame with the destination MAC address of Switch_A.
• A packet with the destination IP of Router_A.
• A frame with the destination MAC address of Router_A.
• A packet with the destination IP of Server_B.
• A frame with the destination MAC address of Server_B.
16 Which statements correctly describe MAC addresses? (Choose
three.)
• dynamically assigned
• copied into RAM during system startup
• layer 3 address
• contains a 3 byte OUI
• 6 bytes long
• 32 bits long
17. Which two features make switches preferable to hubs in
Ethernet-based networks? (Choose two.)
• reduction in cross-talk
• minimizing of collisions
• support for UTP cabling
• division into broadcast domains
• increase in the throughput of communications
18. What are the two most commonly used media types in Ethernet
networks today? (Choose two.)
• coaxial thicknet
• copper twisted pair
• coaxial thinnet
• optical fiber
• shielded coaxial cable
19. Convert the binary number 10111010 into its hexadecimal equivalent. Select
the correct answer from the list below.
• 85
• 90
• BA
• A1
• B3
• 1C
20. After an Ethernet collision, when the backoff algorithm is
invoked, which device has priority to transmit data?
• the device involved in the collision with the lowest MAC address
• the device involved in the collision with the lowest IP address
• any device in the collision domain whose backoff timer expires
first
• those that began transmitting at the same time
Host A has an IP address of 172.16.225.93, a mask of
255.255.248.0, and a default gateway of 172.16.224.1. Host A needs to send a
packet to a new host whose IP is 172.16.231.78. Host A performs the ANDing operation on its
address and subnet mask. What two things will occur? (Choose two.)
• Host A will broadcast an ARP request for the MAC of the host
172.16.231.78.
• Host A will get a result of 172.16.224.0 from the AND process
Refer to the exhibit. Which option correctly identifies content
that the frame data field may contain?
• network layer packet