200-120 Study Guide

Cisco 200-120CCNA Cisco Certified Network Associate

Cisco

Cisco Systems, Inc. is an American multinational technology company headquartered in San Jose, California, that designs, manufactures, and sells networking equipment.The stock was added to the Dow Jones Industrial Average on June 8, 2009, and is also included in the S&P 500 Index, the Russell 1000 Index, NASDAQ-100 Index and the Russell 1000 Growth Stock Index.

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Cisco Certification Levels

CCNA

CCNP

CCIE

CCA

Cisco Certified Network Associate

Cisco Certified Network Professional

Cisco Certified Internetwork Expert

Cisco Certified Architect

Cisco Certified Network AssociateCCNA

CCNACisco Certified Network Associate

CCNA (Cisco Certified Network Associate) is an IT certification from Cisco. CCNA certification is an associate-level Cisco Career certification.

CCNACertification

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Question No 1:

Which layer in the OSI reference model is responsible for determining the availability of the receivingprogram and checking to see if enough resources exist for that communication?

A. TransportB. NetworkC. PresentationD. SessionE. Application

Answer: E

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Question No 2:

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.

Answer: A,D,E





Question No 3:

A network interface port has collision detection and carrier sensing enabled on a shared twisted pairnetwork. 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.

Answer: C





Question No 4:

A receiving host computes the checksum on a frame and determines that the frame is damaged. The frameis then discarded. At which OSI layer did this happen?

A. SessionB. TransportC. NetworkD. Data linkE. Physical

Answer: D





Question No 5:

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 controlinformation.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 hostaddresses and protocol-related control information.D. Packets are created when the network layer adds Layer 3 addresses and control information to asegment.E. The presentation layer translates bits into voltages for transmission across the physical link.

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Question No 6:

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 3address information.D. Micro segmentation decreases the number of collisions on the network.E. In a properly functioning network with redundant switched paths, each switched segment will containone root bridge with all its ports in the forwarding state. All other switches in that broadcast domain willhave only one root port.F. If a switch receives a frame for an unknown destination, it uses ARP to resolve the address.

Answer: B,D,E





Question No 7:

Where does routing occur within the DoD TCP/IP reference model?

A. ApplicationB. InternetC. NetworkD. Transport

Answer: B





Question No 8:

For what two purposes does the Ethernet protocol use physical addresses? (Choose two.)

A. To uniquely identify devices at Layer 2B. To allow communication with devices on a different networkC. To differentiate a Layer 2 frame from a Layer 3 packetD. To establish a priority system to determine which device gets to transmit firstE. To allow communication between different devices on the same networkF. To allow detection of a remote device when its physical address is unknown

Answer: A,E





Question No 9:

In an Ethernet network, under what two scenarios can devices transmit? (Choose two.)

A. When they receive a special tokenB. When there is a carrierC. When they detect no other devices are sendingD. When the medium is idleE. When the server grants access

Answer: C,D





Question No 10:

A router has two Fast Ethernet interfaces and needs to connect to four VLANs in the local network. Howcan you accomplish this task, using the fewest physical interfaces and without decreasing networkperformance?

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.

Answer: D





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