200 120 Practice Questions}

Author:  |  Category: Cabling

Submitted by: Jennifer Cheek

Question: 1

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.

Answer: A, C, F

Question: 2

Refer to the exhibit.

Which three statements correctly describe Network Device A? (Choose three.)

A. With a network wide mask of 255.255.255.128, each interface does not require an IP address.

B. With a network wide mask of 255.255.255.128, each interface does require an IP address on a unique IP subnet.

C. With a network wide mask of 255.255.255.0, must be a Layer 2 device for the PCs to communicate with each other.

D. With a network wide mask of 255.255.255.0, must be a Layer 3 device for the PCs to communicate with each other.

E. With a network wide mask of 255.255.254.0, each interface does not require an IP address.

Answer: B, D, E

Question: 3

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

Answer: E

Question: 4

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.

[youtube]http://www.youtube.com/watch?v=Eu_mTZxPofI[/youtube]

F. A router is commonly considered a DCE device.

Answer: A, D, E

Question: 5

Refer to the exhibit.

Host A pings interface S0/0 on router 3. What is the TTL value for that ping?

A. 252

B. 253

C. 254

D. 255

Answer: B

Question: 6

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

Answer: A

Question: 7

Refer to the exhibit.

After HostA pings HostB, which entry will be in the ARP cache of HostA to support this transmission?

Exhibit A

Exhibit B

Exhibit C

Exhibit D

Exhibit E

Exhibit F

Answer: A

Question: 8

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.

Answer: C

Question: 9

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

Answer: D

Question: 10

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.

D. Packets are created when the network layer adds Layer 3 addresses and control information to a segment.

E. The presentation layer translates bits into voltages for transmission across the physical link.

Answer: A, D

Question: 11

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

Answer: A

Question: 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.

Answer: C, D

Question: 13

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.

Answer: B, D, E

Question: 14

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

A. application

B. internet

C. network

D. transport

Answer: B

Question: 15

Refer to exhibit:

Which destination addresses will be used by Host A to send data to Host C? (Choose two.)

A. the IP address of Switch 1

B. the MAC address of Switch 1

C. the IP address of Host C

D. the MAC address of Host C

E. the IP address of the router’s E0 interface

F. the MAC address of the router’s E0 interface

Answer: C, F

About the Author: Test Information: Total Questions: 365 Test Number: 200-120 Vendor Name: CISCO Cert Name: CCNA Test Name: CCNA Cisco Certified Network Associate CCNA (803) Official Site:

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Hum Rejection In Audio Cables

Author:  |  Category: Cabling

Submitted by: Johnathan Cunnings

Audio components are often times ignored by the average person. There are people that don t understand what the humming noises that are prevalent in modern systems can be. For those that have installed new audio equipment to their television set or anything related, it s important to take a careful look at hum rejection in audio cables, because the standard cabling doesn t usually contain it.

Average cables do not have a full balance in regards to sound waves. Sound design relies heavily on proper cabling and grounding. Without being grounded properly, sound design can be tremendously difficult to manage. You could try to get shorter cables and try not to extend options too far, but that seems to be counterproductive for some.

Hum rejection in audio cables is often times found in more expensive cables. The shielding on more expensive cables is often ignored by the consumer simply because they look for the budget items. Budget items do in fact have a good sound, but it s not adequate for perfection, and in time will produce a low level humming sound. The hum will be faint for some and for others it will be deathly in a variety of ways. Getting rid of it will prompt many to check all the connections, even call customer support and much more, to see if things work for the benefit of the system.

[youtube]http://www.youtube.com/watch?v=A0OgUuuRl24[/youtube]

What most manuals omit in their instructions is that you need to have proper shielding on your cables. If the cables aren t placed in proper order, or if they are of subpar quality, or they don t offer enough shielding from electromagnetic currents, then they will only produce the hum and nothing more, or there will be muffled sound design coming forth.

The price of getting proper items for systems that produce high quality (and high definition) sound, whether at home or on a professional setting, vary wildly between manufacturers. It is possible to spend less for equipment, but in the long term, more expensive items can in fact be the best investment possible.

In technology, when you purchase the more expensive attachments, you are putting quality at risk, as many higher end items don t produce the same kind of response that the lower cost items produce. However, things are completely upside down in the audio industry, and getting proper sound is as easy as going with shielded cords that have hum rejection firmly in place.

When you search for hum rejection online, you see a lot of confusion and not a lot of clear cut information, which is why many consumers are confused about this subject matter. However, those that are willing to look a little harder to find proper sound equipment, the right cables (even when over priced) will make all the difference. If you re skeptical, consider trying this option: Go to the store purchase the expensive shielded cables and test them, if the sound quality you re getting doesn t supersede what you ve been hearing and doesn t eliminate the hum, then take them back for a full refund.

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Hum Rejection

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