DHomesb Chapter 3 – CCNA Discovery: Networking for Home and
Small Businesses (Version 4.0)
1. Host A needs to learn the MAC address of Host B, which
is on the same LAN segment. A message has been sent to all the hosts on the
segment asking for the MAC address of Host B. Host B responds with its MAC
address and all other hosts disregard the request. What protocol was used in
this scenario?
ARP
DHCP
DNS
WINS
2. Which two statements concerning networking standards are
true? (Choose two.)
adds complexity to networks
encourages vendors to create proprietary protocols
provides consistent interconnections across networks
ensures that communications work best in a single-vendor
environment
simplifies new product development
3. What is a reason for disabling simple file sharing?
It enables the user to map a remote resource with a local
drive.
It enables the user to share all files with all users and
groups.
It enables the user to share printers.
It enables the user to set more specific security access
levels.
4. What is the function of the FCS field in an Ethernet
frame?
detects transmission errors
provides timing for transmission
contains the start of frame delimiter
indicates which protocol will receive the frame
5. An integrated router can normally perform the functions of which two
other network devices? (Choose two.)
NIC
switch
e-mail server
application server
wireless access point
6. Refer to the graphic. Five PCs are connected through a hub.
If host H1 wants to reply to a message from host H2, which statement is true?
H1 sends a unicast message to H2, but the hub forwards it
to all devices.
H1 sends a unicast message to H2, and the hub forwards it
directly to H2.
H1 sends a broadcast message to H2, and the hub forwards it
to all devices.
H1 sends a multicast message to H2, and the hub forwards it
directly to H2.
7. What does the 100 mean when referencing the 100BASE-T
Ethernet standard?
type of cable used
type of data transmission
speed of transmission
type of connector required
maximum length of cable allowed
8. Which table does a router use to make decisions about
the interface through which a data packet is to be sent?
ARP table
routing table
network table
forwarding table
9. A switch receives a frame with a destination MAC address
that is currently not in the MAC table. What action does the switch perform?
It drops the frame.
It sends out an ARP request looking for the MAC address.
It floods the frame out of all active ports, except the
origination port.
It returns the frame to the sender.
10. If the default gateway is configured incorrectly on the
host, what is the impact on communications?
The host is unable to communicate on the local network.
The host can communicate with other hosts on the local
network, but is unable to communicate with hosts on remote networks.
The host can communicate with other hosts on remote
networks, but is unable to communicate with hosts on the local network.
There is no impact on communications.
11. Which term is used to describe the process of placing
one message format into another format so that the message can be delivered
across the appropriate medium?
flow control
encapsulation
encoding
multicasting
access method
12 Refer to the graphic. What does the router do after it
determines that a data packet from Network 1 should be forwarded to Network 2?
It sends the data packet as it was received.
It reassembles the frame with different MAC addresses than
the original frame.
It reassembles the data packet with different IP addresses
than the original data packet.
It reassembles both the packet and the frame with different
destination IP and MAC addresses.
13. What type of route allows a router to forward packets
even though its routing table contains no specific route to the destination
network?
dynamic route
default route
destination route
generic route
14. What is the purpose of logical addresses in an IP
network?
They identify a specific NIC on a host device.
They are used to determine which host device accepts the
frame.
They provide vendor-specific information about the host.
They are used to determine the network that the host is
located on.
They are used by switches to make forwarding decisions.
15. Which two networking devices are used to connect hosts
to the access layer? (Choose two.)
router
hub
switch
server
computer
16. Which two items are included in a network logical map?
(Choose two.)
naming scheme
IP addressing scheme
length of cable runs
physical location of networking devices
specific layout of interconnections between networking
devices and hosts
17. What device is typically used as the default gateway
for a computer?
a server hosted by the ISP
the router interface closest to the computer
a server managed by a central IT department
the switch interface that connects to the computer
18. Which address does an NIC use when deciding whether to
accept a frame?
source IP address
source MAC address
destination IP address
destination MAC address
source Ethernet address
19. Which type of address is used in an Ethernet frame
header?
logical addresses only
IP addresses only
MAC addresses only
20. What is a benefit of having a router within the
distribution layer?
prevents collisions on a local network
keeps broadcasts contained within a local network
controls which hosts have access to the network
controls host-to-host traffic within a single local network
21. Which device accepts a message on one port and always
forwards the message to all other ports?
modem
switch
router
hub
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