Có 20+ tài liệu thuộc chủ đề "phương tiện truyền thông mạng IP"
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files, Cisco IOS Software naming conventions, 654–655 filtering, 356. global parameter configuration, Cisco IOS Software, 556–559. HDLC (High-Level Data Link Control), 517 help functions on Cisco IOS routers, 569–571 hexadecimal number system, 23–24. Hyperterminal session establishment on Cisco IOS routers, 562–563. Cisco IOS Software, 575–577 loading, 561. vertical cable, 932 Cisco IOS images, 576–577. intialization process, Cisco IOS routers, 554...
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Cisco Networking Academy Program. www.ciscopress.com 1102.book Page i Tuesday, May PM. Cisco Networking Academy Program Copyright © 2003 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...
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Introduction to Ethernet. IEEE 802.3/Ethernet and the OSI Model. 1102.book Page xi Tuesday, May PM. Introduction to Data Flow. 1102.book Page xii Tuesday, May PM. Introduction to the Spanning Tree Protocol. Chapter 7 TCP/IP Protocol Suite and IP Addressing. Introduction to TCP/IP. Introduction to Subnetting. 1102.book Page xiii Tuesday, May PM. Routing Protocols. Introduction to and Reasons for Subnetting. Chapter...
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Key Terms. The TCP/IP Protocol Suite. TCP/IP Protocol Stack and the Application Layer. TCP/IP Protocol Stack and the Transport Layer. TCP/IP and the Internet Layer. 1102.book Page xxi Tuesday, May PM. Pulling Cable to the Jacks. 1102.book Page xxii Tuesday, May PM. The following icon legend shows the most commonly used icons that you might encounter throughout this book.. Mainframe...
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Chapter 14, “Managing Cisco IOS Software,” examines the stages of the router boot sequence. In addition, this chapter discusses the functions of the configuration register and tells how to determine the version of the IOS file. Finally, this chapter describes how to use a TFTP server as a soft- ware source. This chapter corresponds to the Module 5 content from...
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Expansion slot—An opening in a computer, usually on the motherboard, where an expansion card can be inserted to add new capabilities to the computer (see Figure 1-4).. System unit—The main component of the PC system. The system unit does not include the keyboard, the monitor, or any other external devices connected to the computer.. The motherboard is the computer’s main...
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Binary Representation of Data. The total number of combinations of the eight switches being turned on and off is 256 (or 2 8. Bit—The smallest unit of data in a computer. A bit equals 1 or 0, and it is the binary format in which data is processed, stored, and transmitted by computers.. 1 byte equals 8 bits of data.....
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For example, the eight bit binary number 01110011 would be 115 if con- verted to decimal digits. Does this represent 11-5 or 1-15? If 11-5 is used, the binary number would be 10110101, which is not the number originally converted. Four-Octet Dotted-Decimal Representation of a 32-Bit Binary Number. Currently, addresses assigned to computers on the Internet (IP addresses) are 32-bit...
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Complete all the review questions to test your understanding of the topics and concepts in this chapter. The connection to the Internet can be broken down into which of the following?. All of the above. What is a NIC?. Which of the following is/are the resource(s) you need before you install a NIC?. A standard measurement of the rate at...
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They determine how the physical network is built, how computers connect to the network, how the data is formatted for transmission, and how that data is sent. Synchronous Optical Network (SONET)—Synchronous Transport Signal level 1 (STS-1) (Optical Carrier [OC]-1), STS-3 (OC-3), and so on. Data Center Technology. A data center bypasses potential sources of congestion by distributing the load across...
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The demand for bandwidth is ever-increasing—As soon as new network technol- ogies and infrastructures are built to provide greater bandwidth, new applications are created to take advantage of the greater capacity. The delivery over the network of rich media content, including streaming video and audio, requires tremendous amounts of bandwidth. Analogies That Describe Digital Bandwidth. Bandwidth is like the width...
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This interaction very narrowly defines a layer’s purpose. The two common network models that use layers are the Open System Inter- connection (OSI) reference model and the TCP/IP reference model.. The OSI Reference Model. Proprietary means that one company or a small group of companies controls all usage of the technology. Open means that free usage of the technology is...
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Host devices are physically connected to the network media using a network interface card (NIC). Each NIC carries a unique code called a MAC address. MAC addresses are covered more in a moment. As the name implies, the NIC controls host access to the medium.. There are no standardized symbols for end-user devices in the networking industry.. They bear a...
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Figure 2-32 Optical Platform—The Cisco ONS 15454 DWDM Optical Network System. A firewall protects a private network’s resources from users in other networks.. The AAA server ensures that only authentic users can get into the network (authentication), that the users are allowed access only to the resources they need (authorization), and that records are kept of everything they do after...
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Figure 2-47 Full-Mesh Topology. In a partial-mesh topology , at least one device maintains multiple connections to oth- ers without being fully meshed, as shown in Figure 2-48. A partial-mesh topology still provides redundancy by having several alternative routes. The partial-mesh topology is used for many telecommunications backbones, as well as the Internet.. A network’s logical topology is how the...
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What is the name of the part of a company’s LAN that is made available to select parties such as employees, customers, and partners?. All of the above. Which of the following is the correct order of the network layers?. Which layer of the OSI model handles physical addressing, network topology, network access, and flow control?. Which of the following...
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Voltage is represented by the letter V. The unit of measurement for voltage is the volt, and it is also represented with the letter V (for example, 12 V = 12 volts).. Direct-current (DC) voltage—A battery is an example of a DC voltage source.. The movement of electrons in a DC circuit is always in the same direction, from negative...
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As the diameter of the cable increases, so does the difficulty in working with it because cable must be pulled through existing conduits that are limited in size. Coaxial cable comes in several sizes. This type of coaxial cable is frequently referred to as thicknet, as shown in Figure 3-11. Coaxial cable is more expensive to install than twisted-pair cable....
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Total Internal Reflection. A light ray that is being turned on and off to send data 1s and 0s into an optical fiber must stay inside the fiber until it reaches the far end. The ray must not refract into the material wrapped around the outside of the fiber because such refraction causes the loss of part of the ray’s...
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Fiber-optic patch panels, as shown in Figure 3-31, are similar to the patch panels used with copper cable. Why? Because external light cannot enter the fiber except at the transmitter end. Furthermore, the transmission of light on one fiber in a cable does not generate inter- ference that disturbs transmission on any other fiber, which means that fiber does not...