| Question 1 | Broadband provides sustained speeds above? A. 64Kbps B. 96Kbps C. 128Kbps D. 256Kbps
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| A1: | Answer C is correct; sustained speeds above 128Kbps or 128,000bps are defined as broadband. Answers A and B are incorrect because they are not fast enough. Answer D is wrong; it is a broadband speed, but other speeds slower than that are classified as broadband. |
| Question 2 | The cable distribution network starts at what point? A. Headend B. Subscriber drop C. DSLAM D. CO
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| A2: | Answer A is correct; the distribution network starts at the headend. Answer B is wrong because that is the end of the distribution network. Answer C is incorrect because that is the equipment at a DSL CO. Answer D is also incorrect because it is a term usually reserved for the phone company, not a cable company. |
| Question 3 | What is the name of the device located at the headend that communicates with the CMs? A. DSLAM B. Another CM C. Backend D. CMTS
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| A3: | Answer D is correct; the CMTS handles all the communication to the CMs. Answer A is wrong; a DSLAM is used for DSL but is equivalent to the CMTS. Answer B is incorrect because CMs cannot talk to each other directly, and backend is a made-up term, so Answer C is wrong. |
| Question 4 | A CM should follow what standard? A. DOCSIS B. NTSC C. PAL D. HDTV
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| A4: | Answer A is correct; DOCSIS is the standard that should be used for CM equipment. Answers B, C, and D are incorrect because they are all television-signaling standards, not CM standards. |
| Question 5 | What TV standard is most used in the United States? A. PAL B. NTSC C. DOCSIS D. DSLAM
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| A5: | Answer B is correct; NTSC or the North American TV technical standard is used most in the United States. Answer A is wrong; it is the most used in Europe. Answer C is a little tricky but wrong; it is the most used CM standard in the United States but not a television standard. Answer D is incorrect because it has to do with DSL. |
| Question 6 | A CM uses what service to get its configuration files? A. FTP B. HTTP C. SSL D. TFTP
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| A6: | Answer D is correct; the CM after provisioning communicates with a TFTP server to get the appropriate configuration files. Answers A, B, and C are incorrect; they are not used by the CM for configuration. |
| Question 7 | What is the maximum transmission unit (MTU) size that you should select with PPPoE? A. 1492 bytes B. 1518 bytes C. 1500 bytes D. 1942 bytes
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| A7: | Answer A is correct; 1492 bytes leaves room for the additional 8 bytes of headers for a total no bigger than 1500 bytes. Answers B, C, and D are wrong because the sizes are incorrect. |
| Question 8 | What are three conditions that can affect DSL speeds? (Choose three.) A. Distance to the CO B. FM radio C. Bridge taps D. Crosstalk
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| A8: | Answers A, C, and D are correct; distances, bridge taps, and crosstalk can all slow down the speeds of DSL. Answer B is close but still wrong because it is AM radio that causes interference which can reduce speeds. |
| Question 9 | What are two characteristics of G.lite standard? (Choose two.) A. Defines valid DOCSIS encoding B. Supports 1.5Mbps downstream and 640Kbps upstream C. Is the most common ADSL modulation D. Cannot be used with PPPoE
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| A9: | Answers B and C are correct; it supports only 1.5Mbps downstream and 640Kbps upstream and is the most used consumer/mass-market DMT. Answer A is incorrect because it has nothing to do with cable modems, and Answer D is also wrong because it can be used with PPPoE. |
| Question 10 | What is the PPP protocol that negotiates IP addresses? A. LCP B. DHCP C. IPCP D. CDP
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| A10: | Answer C is correct; PPP uses IPCP to negotiate the IP address. Answer A, LCP, is wrong; it is used by PPP but not for IP addresses. Answer B is incorrect; it might seem like a good choice because DHCP assigns addresses, but not within PPP and not without IPCP. Answer D is also wrong because Cisco Discovery Protocol does not negotiate addresses. |
| Question 11 | What is the command that defines the maximum payload size of 1492 bytes? A. mtu 1492 B. max-packet 1492 C. ip mtu 1492 D. frame-size mtu 1492
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| A11: | Answer C is correct; it is the only valid command and it does set the MTU to 1492 bytes. Answers A, B, and D are all incorrect because the commands do not exist. |
| Question 12 | What is the ATM command to configure the VPI and VCI as provided by the service provider? |
| A12: | Answer D is correct; pvc 9/7 sets both the VPI and VCI. Answers A, B, and C are all incorrect because the commands do not exist. |
| Question 13 | What is the command to let a DSL router detect and set its modulation? A. dsl modulation auto B. dsl modulation discover C. dsl modulation dynamic D. modulation dsl encapsulation discover
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| A13: | Answer A is correct; dsl modulation auto allows the router to dynamically discover the modulation type. It is on by default. Answers B, C, and D are incorrect because the commands do not exist. |
| Question 14 | What command in ATM interface configuration mode sets the encapsulation for PPPoA? A. encapsulation auto ppp dialer B. encapsulation pppoa client dialer C. encapsulation dialer aal5mux D. encapsulation aal5mux ppp dialer
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| A14: | Answer D is correct; encapsulation aal5mux ppp dialer configures the ATM interface for PPPoA. Answers A, B, and C are incorrect because the commands do not exist. |
| Question 15 | On a Cisco 827 router, what pins do you use with a 4-pin RJ-11 connector? A. 1 and 2 B. 2 and 3 C. 3 and 4 D. 1 and 4
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| A15: | Answer B is correct; you use pins 2 and 3 with a 4-pin connector. You use pins 3 and 4 in a 6-pin connector. Remember, you always use the middle pair for each pinout. Answers A, C, and D are wrong because you do not use those pins. |
| Question 16 | What three things can you use to verify whether Layer 1 is functioning? (Choose three.) |
| A16: | Answers A, B, and D are correct; they can all help verify whether Layer 1 is up and functioning. Answer C is incorrect because there is no DSL connect LED. |
