...Course Objectives and Learning Outcomes In this assignment, you will explain the function of DHCP and DNS. Assignment Requirements Write a 1-page report summarizing IT-management overhead in reference to DHCP and DNS. In your report, address IT-management overhead in reference to DNS and DHCP, with the following question in mind: 1. How many hosts does it take to justify the time and effort to setup a centrally managed solution for name resolution and address allocation? (In other words, is it worth setting up DHCP for two computers? 5? 25?) Consider both MS Windows Server DNS and DHCP as well as other, special use devices where DNS or DHCP may be built-in. 2. At what point should DNS or DHCP be considered a priority and require some level of redundancy? 3. Should servers use DHCP? Submission Requirements Maximum 1 page, Microsoft Word, double-spaced, 12 pt. font 1. How many hosts does it take to justify the time and effort to setup a centrally managed solution for name resolution and address allocation? (In other words, is it worth setting up DHCP for two computers? 5? 25?) Consider both MS Windows Server DNS and DHCP as well as other, special use devices where DNS or DHCP may be built-in. I believe one host is enough. In fact, if the host has a functioning network interface which is connected to a network chances are it is managed by DHCP uses DNS for name resolution. Although most end users don’t know or understand the how their computer...
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...In reference to IT-management overhead, DNS and DHCP servers can be very helpful in several ways. The services that these two types of servers offer are crucial in many environments but for simple or smaller networks it is not always necessary to focus on setting them up within the local area network. The services that DNS servers provide eliminate the need to memorize or keep track of multiple numeric IP addresses and allow us to use more user-friendly names or domain names instead. In order for devices to communicate with each other on a network, each must have a different IP address and DNS translates these numeric IP addresses into names and web addresses that make it easier for humans to understand and remember. Typically, the overhead and IT management aspect of DNS are well worth it in most cases unless the network is rather small with few computers. For smaller networks it is much more common to simply use the DNS server offered by the internet service provider in the area. DHCP servers assign IP addresses on the network. Instead of IT administrators having to manually hand out static IP addresses and keep track of them all, DHCP takes care of this as well as provides the default gateway, subnet mask, and the DNS. Configuring a DHCP server is fairly tedious and time consuming and keeping IT overhead in mind, it can be costly as well. With that said, DHCP is not necessary for all types of...
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...Network Administrator will need to be able to make recommendations about overhead costs that support the size, security needs and growth possibilities of an organization. One area that will impact the entire organization for years relates to using/installing Domain Name System (DNS) and Dynamic Host Configuration Protocol (DHCP). DNS and DHCP services can be set up in an office by installing the correct equipment or through the ISP that the organization is using. Knowing what is best for the organization should be based on their current size and equipment needs. A small office with only 2 computers would not require new equipment to be installed. In this size office I would recommend statically assigning the IP addresses to the two computers and using the DNS that is on the ISP network. For an office a little bigger, with 5 computers, I would recommend that they install a router/hub in-one device which can also act as a DHCP server. These all-in-one devices are typically less than $200, will add firewall protection and have ports to connect the computers via an Ethernet connection which will allow better internet access. I would still recommend that this office use the DNS on their ISP’s network. For a larger organization with over 25 computers, I would recommend that they install a Server which will have both DNS & DHCP options. With the size of this organization, having the DNS & DHCP on site will allow for quicker response times when using the internet and...
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...IT-management overhead in reference to DNS and DHCP In order to address the issue of when is it cost effective to employ the use of DHCP for a computer network we first have to get a brief understanding of the terms DNS and DHCP. Domain Name Servers (DNS) for short is like a phone directory for the internet. They translate domain names into IP (Internet Protocol) addresses. Domain names are easier for people to remember, computers access the internet based on IP addresses. Dynamic Host Configuration Protocol (DHCP) is a network protocol that allows a server to automatically assign an IP address to a computer. Now that we have defined these two terms it is possible to analyze the cost effectiveness of a DHCP server. To manually configure a computer workstation with an IP address is not difficult. On the other hand to manually configure tens, hundreds, or thousands of workstations would be too time consuming, it also increases the chance of duplicating IP addresses, misconfiguring the subnet mask or other network protocols. It is in these instances that DHCP is not only a handy tool it is a needed tool for network administrators to perform their job. There are three main instances to manually assign addresses. 1) When there are no configured DHCP servers on the network and the network has multiple network segments. 2) When you are configuring a computer as a DHCP server, you assign that computer a static IP address. 3) When you configure computers as important network...
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...When you are using DNS or DHCP you should keep in mind that they are very large roles and you should only use them if you need to address a large number of PC’s and you cannot manually address them yourself. In fact you should probably only use DHCP if you are working with upwards of 100 terminals otherwise you should manually address them because DHCP does consume a lot of resources and therefore you should avoid using it. The reason that it consumes so much is because of the fact that you are running a server with the sole intention of running DHCP which will assign an IP address to any PC that connects to the server. As far as name resolution you should keep the same minimum because 100 terminals is approximately where it would likely become unrealistic to resolve names and IP addresses manually because of the fact that it would take far too much time. You should also keep in mind that if you have a DHCP or DNS server or any servers in general then you are going to have to keep it on at all times otherwise your users will be unable to connect to the internet because they will not have an IP address. Or if they are able connect to the internet then they will have errors when they type in the web address then they will not be able to fix them. As far as the IT-management overhead when referring to DHCP or DNS you should also keep in mind the facts stated previously. First of all it can be very cost ineffective if you try to run a DNS or DHCP server for just 1 or 2 PC’s. The...
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...Essential Network Protocols Modern computer networking leverages many components to enable computers on one network (or opposite side of the world) to communicate with a computer on a different network (or other side of the world). Of the components that enable network communication, there are several in the TCP/IP suite of protocols that work in the background to provide reliable Internet connection and data transport every day for millions of computers worldwide. Internet protocol or IP is an essential component of modern internetwork communication. IP is a connectionless protocol that provides neither fault tolerance nor error correction. It is also not responsible for the setup or teardown of network communications. The primary job assigned to IP is logical addressing and routing as it resides at layer 3 (the Network layer) of the OSI model. While every host on the network has a hardware address (also called a MAC address), hosts can only communicate with other hosts in the same broadcast domain using MAC addressing. For internetwork communication, a logical, unique network address is required so that the devices forwarding network traffic (primarily routers), can determine the source and destination and best route to forward data packets. The ARP or Address Resolution Protocol enables devices on a single network, in a single broadcast domain, to find the hardware or MAC address of a device on the network given the IP address...
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...TCP/IP Model review: Upper layers define non-physical (logical) networking functions Various Perspectives on the TCP/IP Model and Roles 3 Figure 8-2 Introducing the Internet Protocol (IP) Network Layer protocols IP: Most important protocol defined by Network layer Almost every computing device on planet communicates, and most use IP to do so Network layer also defines other protocols 4 Introducing the Internet Protocol (IP) Network Layer protocols: Part 1 Name ICMP ARP DHCP DNS Full Name Comments Messages that hosts and routers use to manage Internetwork Control and control packet forwarding process; used by Message Protocol ping command Address Resolution Used by LAN hosts to dynamically learn Protocol another LAN host’s MAC address Dynamic Host Used by host to dynamically learn IP address Configuration Protocol (and other information) it can use Allows hosts to use names instead of IP Domain Name address; needs DNS server to translate name System/Service into corresponding IP address (required by IP routing process) Other TCP/IP Network Layer Protocols Table 8-1 5 Introducing the Internet Protocol (IP) Network Layer protocols: Part 2 Name Full Name RIP Routing Information Protocol Enhanced Interior EIGRP Gateway Routing Protocol Open Shortest Path OSPF First Comments Application that runs on routers so that routers dynamically learn IP routing tables (used to route IP packets...
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...You’re Free Inc. | Network Design Project | You’re Free Incorporated | | Contents Executive Summary 3 Project Scope 4 Project Goal 5 Design Requirements 7 Design Requirements – Assumptions 9 Current State of the Network 9 New Logical and Physical Design 14 Implementation Plan 18 Budget 21 References 25 Appendix: Equipment Prices 27 Executive Summary Network requirements are changing on a regular basis. Not too long ago you could only have a wired network connection. If you wanted to make that existing connection portable you simply just connected a longer cable to your computer and dragged it around the office. This contributed to a mess of unsightly cables and multiple connections around an office space that could be connected and reconnected as office layouts changed over time. Even just a few years ago a wireless network was not even worth the effort because of the slow connections and download speeds. Now every coffee shop offers wireless internet with speeds faster than the wired networks of 10 years ago. The company at discussion, You’re Free Inc. is a small law firm that has just experienced some growth and doubled its employee roster as well as double its office space from one floor to two. It is currently using a very slow 10Mbps network to access applications on its server and do video conferencing. As you can imagine there is a big slow down in the network and high latency is experienced during a video conference and during...
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...Review Questions for Test-1 (with Answers): Chapter 1: Introduction to Data Communications Outline 1.1 Network Basics 1.2 Network Layer Model (most important) 1.3 Network Standards 1.4 Future Trends (least important) Answers to End-of-Chapter Questions 1. Describe the progression of communications systems from the 1800s to the present. Communications systems progression from the 1800s to the present: 1837 Invention of the telegraph 1876 Invention of the telephone 1877 Telephone system regulation begins in Canada 1878 Telephone system regulation begins in the United States 1879 Direct dialed long distance service begins 1880 Satellites begin to transmit international telephone calls 1881 Caterfone court decision permits non-Bell telephone equipment to be used 1970 Court permits MCI to provide long distance services 1984 Breakup of AT&T 1985 Cellular phones enter service 1996 Telecommunications Act of 1996 deregulates American telephone system 2. Why are network layers important? Communication networks are often broken into a series of layers, each of which can be defined separately, to enable vendors to develop software and hardware that can work together in the overall network. 3. Describe the four layers in the network model used in this book and what they do. • The application layer is the application software used by the user. • The network layer takes the message generated...
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...CCNA Notes Introduction Cisco offers two options for obtaining the CCNA certification: Pass Exam 640-802 OR Pass Exam 640-822 AND Exam 640-816 While you can use these notes to prepare for either exam, the notes are geared towards passing the single exam. I recommend you study all of the material and take the single exam option rather than taking two exams. Cisco Device Icons The following table lists the specific icons Cisco uses to represent network devices and connections. Represents Icon Hub Bridge Switch Router Access point Network cloud Ethernet connection Serial Line connection Wireless connection Virtual Circuit The OSI Model As you study this section, answer the following questions: What is the OSI model and why is it important in understanding networking? How does the third OSI model layer relate to administering routers? Which OSI model layer is concerned with MAC addresses? What protocols correspond to the Presentation and Session layers? What is the difference between the TCP and UDP protocols? What is the EIA/TIA 232 protocol concerned with? This section covers the following exam objectives: 103. Use the OSI and TCP/IP models and their associated protocols to explain how data flows in a network 105. Describe the purpose and basic operation of the protocols in the OSI and TCP models 110. Identify and correct common network problems at layers 1, 2, 3 and 7 using a layered model approach ...
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...[pic] [pic] Windows Deployment Services Step-by-Step Guide Microsoft Corporation Published: March 2008 Author: Trina Gorman Editor: Katie Cumming Abstract This guide provides an introduction to Windows Deployment Services in Windows Server® 2008. It includes an overview of features and procedures to follow to setup the technology. [pic] Copyright Information This document supports a preliminary release of a software product that may be changed substantially prior to final commercial release, and is the confidential and proprietary information of Microsoft Corporation. It is disclosed pursuant to a non-disclosure agreement between the recipient and Microsoft. This document is provided for informational purposes only and Microsoft makes no warranties, either express or implied, in this document. Information in this document, including URL and other Internet Web site references, is subject to change without notice. The entire risk of the use or the results from the use of this document remains with the user. Unless otherwise noted, the example companies, organizations, products, domain names, e-mail addresses, logos, people, places, and events depicted herein are fictitious, and no association with any real company, organization, product, domain name, e-mail address, logo, person, place, or event is intended or should be inferred. Complying with all applicable copyright laws is the responsibility of the user. Without limiting the rights...
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...Architecture changes in Windows Server 2008 Windows Server 2008 comes in different versions to provide key functionality to support any sized business and IT challenge. Foundation is a cost-effective, entry-level technology foundation targeted at small business owners and IT generalists supporting small businesses. Standard has with built-in, enhanced Web and virtualization capabilities, it is designed to increase the reliability and flexibility of your server infrastructure while helping save time and reduce costs. Enterprise is the advanced server that provides cost-effective and reliable support for mission-critical workloads. Datacenter delivers an enterprise-class platform for deploying business-critical applications and large-scale virtualization on small and large servers. Web Server is a powerful Web application and services platform. Featuring Internet Information Services (IIS) 7.5 and designed exclusively as an Internet-facing server. (Microsoft, 2010) Top 10 New Features in Windows Server 2008 #10: The self-healing NTFS file system: Ever since the days of DOS, an error in the file system meant that a volume had to be taken offline for it to be remedied. In WS2K8, a new system service works in the background that can detect a file system error, and perform a healing process without anyone taking the server down. #9: Parallel session creation: "Prior to Server 2008, session creation was a serial operation," Russinovich reminded us. "If you've got a Terminal Server...
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...Top-Down Network Design Third Edition Priscilla Oppenheimer Priscilla Oppenheimer Cisco Press 800 East 96th Street Indianapolis, IN 46240 ii Top-Down Network Design Top-Down Network Design, Third Edition Priscilla Oppenheimer Copyright© 2011 Cisco Systems, Inc. Published by: Cisco Press 800 East 96th Street Indianapolis, IN 46240 USA All rights reserved. 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 quotations in a review. Printed in the United States of America First Printing August 2010 Library of Congress Cataloging-in-Publication data is on file. ISBN-13: 978-1-58720-283-4 ISBN-10: 1-58720-283-2 Warning and Disclaimer This book is designed to provide information about top-down network design. Every effort has been made to make this book as complete and as accurate as possible, but no warranty or fitness is implied. The information is provided on an “as is” basis. The author, Cisco Press, and Cisco Systems, Inc. shall have neither liability nor responsibility to any person or entity with respect to any loss or damages arising from the information contained in this book or from the use of the discs or programs that may accompany it. The opinions expressed in this book belong to the author and are not necessarily those of Cisco...
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...------------------------------------------------- Step 1: Choose mode table glossary small large 3" x 5" index card Want to print a test? Click here. Alphabetize Flip terms and definitions ------------------------------------------------- Step 2: Open the file Open PDF ------------------------------------------------- Step 3: Print it! ← Back to Set | PC Pro Certification Practice Exam A+ 220-801Study online at quizlet.com/_ipciw | 1. | An administrator wants to prevent people outside of the building from accessing a new wireless router. Which of the following is the LEAST labor intensive method to use while setting up new workstations? A. Turn SSID broadcast off B. Use wireless encryption C. Institute MAC filtering D. Setup static IP addresses | | A. Turn SSID broadcast off | 2. | After installing a bar code reader, which of the following is commonly done to configure the reader? A. Scan in program codes B. Enable the code reader in the BIOS C. Use Device Manager to enable I⁄R ports D. Adjust jumper switches | | A. Scan in program codes | 3. | After installing a new serial port card in a computer, the communication parameters need to be configured. Which of the following is the MOST common communication configuration for a serial port? A. Eight data bits, even parity, two stop bits B. Seven data bits, no parity, one stop bit C. Eight data bits, no parity, one stop bit D. Seven data bits, even...
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...Windows Server® 2008 FOR DUMmIES ‰ by Ed Tittel and Justin Korelc Windows Server® 2008 For Dummies® Published by Wiley Publishing, Inc. 111 River Street Hoboken, NJ 07030-5774 www.wiley.com Copyright © 2008 by Wiley Publishing, Inc., Indianapolis, Indiana Published by Wiley Publishing, Inc., Indianapolis, Indiana Published simultaneously in Canada No part of this publication may be reproduced, stored in a retrieval system or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, scanning or otherwise, except as permitted under Sections 107 or 108 of the 1976 United States Copyright Act, without either the prior written permission of the Publisher, or authorization through payment of the appropriate per-copy fee to the Copyright Clearance Center, 222 Rosewood Drive, Danvers, MA 01923, (978) 750-8400, fax (978) 646-8600. Requests to the Publisher for permission should be addressed to the Legal Department, Wiley Publishing, Inc., 10475 Crosspoint Blvd., Indianapolis, IN 46256, (317) 572-3447, fax (317) 572-4355, or online at http:// www.wiley.com/go/permissions. Trademarks: Wiley, the Wiley Publishing logo, For Dummies, the Dummies Man logo, A Reference for the Rest of Us!, The Dummies Way, Dummies Daily, The Fun and Easy Way, Dummies.com, and related trade dress are trademarks or registered trademarks of John Wiley & Sons, Inc. and/or its affiliates in the United States and other countries, and may not be used without written permission...
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