CCNA 1 Discovery V 4.0 Chapter 3 Answer
1. 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
2.
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.
3. 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
4. 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
5. 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
6. Which type of address is used in an Ethernet frame header?
logical
addresses only
IP
addresses only
MAC
addresses only
broadcast
addresses only
7. 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
8. 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.
9. Which device accepts a message on one port and always
forwards the message to all other ports?
modem
switch
router
hub
10. Which two networking devices are used to connect hosts to
the access layer? (Choose two.)
router
hub
switch
server
computer
11. 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
12. 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.
13. 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
14.
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.
15. 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
I16. f 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.
17. 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
18. 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
19. 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
20. 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
21. 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.
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