Có 120+ tài liệu thuộc chủ đề "phương tiện truyền thông mạng IP"
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Drawing can begin while final testing is taking place, but assurances must be made that no changes or additional work is done that is not reflected accurately in the drawings.. The contractor is not required to redraw the building plans for the as-built drawings. The punch list can take the form of the customer’s final acceptance of the project. When...
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What is the purpose of this floor?. It also contains the bottom floor of an auditorium. Add them all up, round up to the nearest 1000, add 1000, and then divide by 1000. You determined that you needed risers between each floor. The point at which responsibility for the lines and equipment transfers from the network provider to the user...
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1000BASE-LX 1000-Mbps baseband Gigabit Ethernet specification using a long wave- length for a long-haul fiber-optic cable for a maximum length of ft.).. 1000BASE-SX 1000-Mbps baseband Gigabit Ethernet specification using a short laser wavelength on multimode fiber-optic cable for a maximum length of 550m (1804.5 ft.).. 1000BASE-T 1000-Mbps baseband Gigabit Ethernet specification using four pairs of Category 5 UTP cable for...
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When the buffers on the receiving device are full, a message is sent to the sending device to suspend the transmission until the data in the buffers has been processed. FM (frequency modulation) Modulates the frequency of the wave.. FTP (File Transfer Protocol) An application protocol, part of the TCP/IP protocol stack, used for transferring files between network nodes. A...
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PM (phase modulation) Modulates the polarity (phase) of the wave.. presentation layer Layer 6 of the OSI reference model. This layer ensures that infor- mation sent by the application layer of one system can be read by the application layer of another.. protocol stack A set of related communications protocols that operate together and, as a group, address communication at...
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The connection to the Internet can be broken down into which of the following?. All of the above. What is the main circuit board of a computer?. What is a NIC?. Which of the following is/are the resource(s) you need before you install a NIC?. Match the following terms with their definitions:. A standard measurement of the rate at which...
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What is the maximum distance for thick Ethernet without using a repeater?. What is the transmission medium for 1000BASE-SX?. 4D-PAM5 encoding method is used in which of the following Gigabit Ethernet?. What is the IEEE standard for 10-Gb Ethernet?. Which of the following is not a feature of microsegmentation?. Which of the following is used by LAN switches for making...
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Which of the following is true at initial boot-up output?. The Cisco IOS Software version that the router uses can be seen.. Ctrl + a Moves out of configuration mode Ctrl + b Moves to the end of the command line Ctrl + e Moves back one word. Ctrl + f Moves to the beginning of the command line Esc...
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When a technician performs basic testing of a network, which of the following is true?. When a technician troubleshoots a problem on a network, which layer of the OSI model should he/she begin with?. When a network administrator wants to verify the application layer software between source and destination stations, which of the following commands should be used?. You suspect...
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Cisco IOS router output, 560–562 from Flash memory, 647. circuit-switched networks, 291, 520 Cisco IOS File System (IFS), 651–653 Cisco IOS Software. backing up with TFTP, 656. accessing on Cisco IOS routers, 566–569 command modes, 578. Layer 3 troubleshooting, 793–795 testing connectivity, 15–16 privileged EXEC mode, 589–592 recalling on Cisco IOS routers, 572–573 router, 701–702. compatibility of Cisco IOS images...
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ZigBee A technology consisting of small, low-power digital radios based on the IEEE 802.15.4 standard for wireless personal-area networks.. 526 Wireless Express Controller, 281 802.1x, 338-339. network infrastructure networks, 55 802.11a, 106-108. 802.11b g n MHz band, 11 1130AG series AP, 177 1240AG series AP, 178 1250AG series AP, 178. authentication 802.1x, 338-339. Electronics Engineers), 27 IEEE 802.1x, 338-339 IEEE...
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CCNA Wireless. Official Exam Certification Guide. CCNA Wireless Official Exam Certification Guide. Copyright© 2009 Cisco Systems, Inc.. No part of this book may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, recording, or by any information storage and retrieval system, without written permission from the publisher, except for the inclusion of brief...
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Exam Preparation Tasks 110 Review All Key Concepts 110. Complete the Tables and Lists from Memory 110 Definition of Key Terms 110. “Do I Know This Already?” Quiz 113 Foundation Topics 116. A Wireless Connection 125 Exam Preparation Tasks 129. Review All the Key Concepts 129. Complete the Tables and Lists from Memory 129 Definition of Key Terms 129. “Do...
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CCNA Wireless Official Exam Certification Guide is an excellent self-study resource for the Cisco IUWNE (640-721) exam. To learn more, visit http://www.cisco.com/go/training.. I hope that you find these materials to be an enriching and useful part of your exam preparation.. Regardless of your background, one of the primary goals of the new CCNA Wireless certification is to introduce you to...
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Describe wireless regulatory bodies, standards and certifications (FCC, ETSI, 802.11a/b/g/n, WiFi Alliance). Describe networking technologies used in wireless (SSID —>. Interface — >VLAN, 802.1q trunking). Describe frame types (associated/unassociated, management, control, data part1.qxd PM Page 2. Chapter 1 Introduction to Wireless Networking Concepts Chapter 2 Standards Bodies. Chapter 6 Overview of the 802.11 WLAN Protocols Chapter 7 Wireless Traffic Flow...
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The 5-GHz range is used by the 802.11a standard and the new 802.11n draft standard. In the 802.11a standard, data rates can range from 6 Mbps to 54 Mbps. 802.11a devices were not seen in the market until 2001, so they do not have quite the market penetration as 2.4- GHz range 802.11 b devices. A total of 23 nonoverlapping...
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What is the maximum EIRP for point-to-multipoint in Europe? (Choose all that apply.) a. 20 dBm. 17 dBm d. 36 dBm. The FCC regulates EIRP in the U.S. for point-to-point and. for point-to-multipoint.. 36 dBm, 36 dBm b. The IEEE committees work on which of the following wireless standards? (Choose all that apply.). 802.11a b. 802.11g c. 802.11x d. 802.1q...
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Which of the following best describes a frequency that is seen 1 million times per second?. EIRP is calculated using which of the following formulas?. In the Free Path Loss model, objects that are farther away from a transmitter receive the same amount of signal as those that are closer to the transmitter. If a signal is being spread about...
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Although it might seem hopeless to deploy a network that is susceptible to various forms of interference, you can fight back. The Fresnel Zone. This method determines what is called the Fresnel zone.. To visualize this, you can think of the shape of a football, which is wider in the middle. However, with the Fresnel zone calculation, you use an...
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Even though this is called a network, its form can mislead you into thinking that it’s not a networking technology. A WPAN has the following characteristics:. Unlicensed 2.4-GHz spectrum. In a Bluetooth network, you communicate on the 2.4-GHz spec- trum. Although this book doesn’t discuss FHSS, it’s good to un- derstand that even though Bluetooth operates on the same frequency...