READ Free Dumps For Cisco- 200-120
| Question ID 5917 | Which of the following describes the roles of devices in a WAN? (Choose three.)
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| Option A | A CSU/DSU terminates a digital local loop
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| Option B | A modem terminates a digital local loop
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| Option C |
- A CSU/DSU terminates an analog local loop.
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| Option D |
- A modem terminates an analog local loop.
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| Option E | A router is commonly considered a DTE device
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| Option F | A router is commonly considered a DCE device
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| Correct Answer | A, D, E |
Explanation The idea behind a WAN is to be able to connect two DTE networks together through a DCE network. The network's DCE device (includes CSU/DSU) provides clocking to the DTE- connected interface (the router's serial interface).A modem modulates outgoing digital signals from a computer or other digital device to analog signals for a conventional copper twisted pair telephone line and demodulates the incoming analog signal and converts it to a digital signal for the digital device. A CSU/DSU is used between two digital lines - For more explanation of answer D, in telephony the local loop (also referred to as a subscriber line) is the physical link or circuit that connects from the demarcation point of the customer premises to the edge of the carrier or telecommunications service provider's network. Therefore a modem terminates an analog local loop is correct.
| Question ID 17807 | 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?
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| Option A | Use a hub to connect the four VLANS with a Fast Ethernet interface on the router.
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| Option B | Add a second router to handle the VLAN traffic.
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| Option C | Add two more Fast Ethernet interfaces.
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| Option D | Implement a router-on-a-stick configuration.
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| Correct Answer | D |
Explanation