Cisco Exam 200-120 (Version: 21.0)
Topic 1: Operation of IP Data Networks
1. What is the difference between a CSU/DSU and a modem?
A. A CSU/DSU converts analog signals from a router to a leased line; a modem converts analog signals from a router to a leased line.
B. A CSU/DSU converts analog signals from a router to a phone line; a modem converts digital signals from a router to a leased line.
C. A CSU/DSU converts digital signals from a router to a phone line; a modem converts analog signals from a router to a phone line.
D. A CSU/DSU converts digital signals from a router to a leased line; a modem converts digital signals from a router to a phone line.
2. Refer to the exhibit.
Based on the information given, which switch will be elected root bridge and why?
A. Switch A, because it has the lowest MAC address
B. Switch A, because it is the most centrally located switch
C. Switch B, because it has the highest MAC address
D. Switch C, because it is the most centrally located switch
E. Switch C, because it has the lowest priority
F. Switch D, because it has the highest priority
3. Refer to the graphic.
Host A is communicating with the server. What will be the source MAC address of the frames received by Host A from the server?
A. the MAC address of router interface e0
B. the MAC address of router interface e1
C. the MAC address of the server network interface
D. the MAC address of host A
4. In an Ethernet network, under what two scenarios can devices transmit? (Choose two.)
A. when they receive a special token
B. when there is a carrier
C. when they detect no other devices are sending
D. when the medium is idle
E. when the server grants access
5. Host 1 is trying to communicate with Host 2. The e0 interface on Router C is down.
A. Router C will use ICMP to inform Host 1 that Host 2 cannot be reached.
B. Router C will use ICMP to inform Router B that Host 2 cannot be reached.
C. Router C will use ICMP to inform Host 1, Router A, and Router B that Host 2 cannot be
reached.
D. Router C will send a Destination Unreachable message type.
E. Router C will send a Router Selection message type.
F. Router C will send a Source Quench message type.
6. Which of the following correctly describe steps in the OSI data encapsulation process?
(Choose two.)
A. The transport layer divides a data stream into segments and may add reliability and flow control information.
B. The data link layer adds physical source and destination addresses and an FCS to the segment.
C. Packets are created when the network layer encapsulates a frame with source and destination host addresses and protocol-related control information.
B. Packets are created when the network layer adds Layer 3 addresses and control information to a segment.
C. The presentation layer translates bits into voltages for transmission across the physical link.
7. Which layer in the OSI reference model is responsible for determining the availability of the receiving program and checking to see if enough resources exist for that communication?
A. transport
B. network
C. presentation
D. session
E. application.
8. Which of the following statements describe the network shown in the graphic? (Choose two.)
A. There are two broadcast domains in the network.
B. There are four broadcast domains in the network.
C. There are six broadcast domains in the network.
D. There are four collision domains in the network.
E. There are five collision domains in the network.
F. There are seven collision domains in the network.
9: Refer to the exhibit: Complete this network diagram by dragging the correct device name or description to the correct location. Not all the names or descriptions will be used.
10. A network interface port has collision detection and carrier sensing enabled on a shared twisted pair network. From this statement, what is known about the network interface port?
A. This is a 10 Mb/s switch port.
B. This is a 100 Mb/s switch port.
C. This is an Ethernet port operating at half duplex.
D. This is an Ethernet port operating at full duplex.
E. This is a port on a network interface card in a PC.
11. A receiving host computes the checksum on a frame and determines that the frame is damaged. The frame is then discarded. At which OSI layer did this happen?
A. session
B. transport
C. network
D. data link
E. physical
12. Refer to the exhibit
What two results would occur if the hub were to be replaced with a switch that is configured with one Ethernet VLAN? (Choose two.)
A. The number of collision domains would remain the same.
B. The number of collision domains would decrease.
C. The number of collision domains would increase.
D. The number of broadcast domains would remain the same.
E. The number of broadcast domains would decrease.
F. The number of broadcast domains would increase.
13. Where does routing occur within the DoD TCP/IP reference model?
A. application
B. internet
C. network
D. transport
14. A router has two Fast Ethernet interfaces and needs to connect to four VLANs in the local network. How can you accomplish this task, using the fewest physical interfaces and without decreasing network performance?
A. Use a hub to connect the four VLANS with a Fast Ethernet interface on the router.
B. Add a second router to handle the VLAN traffic.
C. Add two more Fast Ethernet interfaces.
D. Implement a router-on-a-stick configuration.
15. Drag the cable type on the left to the purpose for which it is best suited on the right (Not all options are used)
16. For what two purposes does the Ethernet protocol use
physical addresses? (Choose two.)
A. to
uniquely identify devices at Layer 2
B. to
allow communication with devices on a different network
C. to
differentiate a Layer 2 frame from a Layer 3 packet
D. to
establish a priority system to determine which device gets to transmit first
E. to
allow communication between different devices on the same network
F. to
allow detection of a remote device when its physical address is unknown
17. Refer to the exhibit:
What will Router1 do when it receives the data frame shown?
(Choose three.)
A. Router1
will strip off the source MAC address and replace it with the MAC address
0000.0c36.6965.
B. Router1
will strip off the source IP address and replace it with the IP address
192.168.40.1.
C. Router1
will strip off the destination MAC address and replace it with the MAC address
0000.0c07.4320.
D. Router1
will strip off the destination IP address and replace it with the IP address of
192.168.40.1.
E. Router1
will forward the data packet out interface FastEthernet0/1.
F. Router1
will forward the data packet out interface FastEthernet0/2.
18. A network administrator is verifying the configuration of a
newly installed host by establishing an FTP connection to a remote server. What
is the highest layer of the protocol stack that the network administrator is
using for this operation?
A. application
B. presentation
C. session
D. transport
E. internet
F. data
link
19. Which of the following describes the roles of devices in a
WAN? (Choose three.)
A. A
CSU/DSU terminates a digital local loop.
B. A
modem terminates a digital local loop.
C. A
CSU/DSU terminates an analog local loop.
D. A
modem terminates an analog local loop.
E. A
router is commonly considered a DTE device.
F. A
router is commonly considered a DCE device.
20. Which three statements accurately describe Layer 2 Ethernet
switches? (Choose three.)
A. Spanning
Tree Protocol allows switches to automatically share VLAN information.
B. Establishing
VLANs increases the number of broadcast domains.
C. Switches
that are configured with VLANs make forwarding decisions based on both Layer 2
and Layer 3 address information.
D. Microsegmentation
decreases the number of collisions on the network.
E. In
a properly functioning network with redundant switched paths, each switched
segment will contain one root bridge with all its ports in the forwarding
state. All other switches in that broadcast domain will have only one root
port.
F. If
a switch receives a frame for an unknown destination, it uses ARP to resolve
the
address.
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