显示标签为“cisco”的博文。显示所有博文
显示标签为“cisco”的博文。显示所有博文

2008年7月31日星期四

Pass4side CCNP-BSCI 002静态路由

CCNP-BSCI 002静态路由
静态路由(复习)

前面谈到,路由器依靠路由表来转发数据报文。那么路由表是如何产生的呢?
路由表的完善依靠两种方式:人为的以手工方式输入信息(静态获得);通过某种协议来自动的获取信息。(动态学习)

那么它们各自的优势和弊端在哪里呢?
静态路由:很明显,既然是人为的手工输入信息,那么如果网络规模过大,需要的工作量很大。但是可以对路由表查询实施精确的控制;
动态路由:相比静态而言,它是由路由器动态学习获得,它节省了人力,但是对于任何程度而言,自动化的程度越高,它的可控程度就越差,不便于人为的干预。
具体该采用哪一种,依照实际情况而定。一般我们都会采用动态和静态结合的方式来完善路由表。

CISCO路由器上,我们配置静态路由的语法:


在全局模式下
router(config)#ip route prefix mask {next-hop addressinterface} [distance] [permanent]
prefix mask :我们要加入的远程网络的网络号及掩码
next-hop address:去往该远程网络的下一跳地址(用直连的下一站地址)
interface:去往远程网络的出口(用接口名)
distance:管理距离(指明去往该网络的某条路径的可信任程度)
permanent:路由条目永久保存在路由表中,即使路由器的接口down 掉了该条目也会被存于路由表中
注:一般情况下,我们只在点对点的链路中采用interface选项,否则采用next-hop选项

还有一种特殊的静态路由--默认路由
router(config)#ip route 0.0.0.0 0.0.0.0 {next-hop addressinterface} [distance] [permanent]
除了用0/0替换掉普通静态路由里的目标地址字段外,其他的无变化,这里的0/0代表的是所有网络,也就是该路由器所有的未知网络,均丛我们指定的接口或下一站出去
有些时候,我们觉得静态路由过于麻烦,而且一旦配置好后,如果发生了拓扑变化,我们又要更改,但是又不想使用动态路由,该怎么办呢?CISCO提供的ODR就是一个不错的选择。
它一般应用于hub-and-spoke网络中,采用CDP(CISCO发现协议)来动态的收集网络信息,它只需要配置在中心设备上。一条命令搞定
router(config)#router odr 但是所有路由器必须都开启CDP
它可以减少设备的工作负担,节省了人力,当拓扑发生改变时,不需要人为的再去干预,但是它只能运行在hub-and-spoke网络中,而且由于CDP是CISCO专用,也就是说,它对设备的要求比较苛刻。

摘自:
http://51-test.cn/

2008年7月16日星期三

Cisco CCNA Certification Overview

Cisco CCNA Certification Overview
The Cisco CCNA network associate certification validates the ability to install, configure, operate, and troubleshoot medium-size routed and switched networks, including implementation and verification of connections to remote sites in a WAN. This new curriculum includes basic mitigation of security threats, introduction to wireless networking concepts and terminology, and performance-based skills. This new curriculum also includes (but is not limited to) the use of these protocols: IP, Enhanced Interior Gateway Routing Protocol (EIGRP), Serial Line Interface Protocol Frame Relay, Routing Information Protocol Version 2 (RIPv2),VLANs, Ethernet, access control lists (ACLs)List of CCNA Certification Exams[ 640-822 ] Interconnecting Cisco Networking Devices Part 1 [ 640-816 ] Interconnecting Cisco Networking Devices Part 2 [ 640-802 ] Cisco Certified Network Associate [ 640-821 ] Introduction to Cisco Networking Technologies [ 640-811 ] Interconnecting Cisco Networking Devices [ 640-801 ] CCNA

New CCNA exam number will be 640-802

New CCNA exam number will be 640-802
Cisco certification news, 640-801 CCNA will be expired in 11/6/07. The new Cisco Certified Network Associate (CCNA) exam number is 640-802.
The 640-802 Cisco Certified Network Associate (CCNA) is the cnposite exam associated with the Cisco Certified Network Associate certification. Candidates can prepare for this exam by taking the Interconnecting Cisco Networking Devices Part 1 (ICND1) v1.0 and the Interconnecting Cisco Networking Devices Part 2 (ICND2) v1.0 courses. This exam tests a candidate’s knowledge and skills required to install, operate, and troubleshoot a small to medium size enterprise branch network. The topics include connecting to a WAN; implementing network security; network types; network media; routing and switching fundamentals; the TCP/IP and OSI models; IP addressing; WAN technologies; operating and configuring IOS devices; extending switched networks with VLANs; determining IP routes; managing IP traffic with access lists; establishing point-to-point connections; and establishing Frame Relay connections.

2008年7月7日星期一

Analysis on CCNA Exam 640-802 with pass4side

CCNA Official Exam 640-802 Exam Certification Guide
CCNA Official Exam Certification Library, Third Edition, is the newest edition of the all-time best-selling CCNA self-study preparation package. This cnprehensive review and practice package is designed for the latest CCNA 640-802 exams. The two books contained in this package, CCENT/CCNA ICND1 Official Exam Certification Guide, Second Edition, and CCNA ICND2 Official Exam Certification Guide, Second Edition, present cnplete reviews and a more challenging and realistic preparation experience. The books are updated to cover all the new 640-802 exam objectives, such as security, wireless, IPv6, and troubleshooting.
What can you do with the CCNA Official Exam Certification Library?
Assess your knowledge with chapter-opening quizzesReview key concepts with Exam Preparation TasksPractice with hundreds of exam questions on the CD-ROMLearn about more cnplex topics with over one hour of video training CCNA Official Exam Certification Library, Third Edition, presents you with an organized test preparation routine through the use of proven series elements and techniques. “Do I Know This Already” quizzes open each chapter and allow you to decide how much time you need to spend on each section. Chapter ending Exam Preparation Tasks sections help drill you on key concepts you must know thoroughly and help increase your speed in answering questions, a difficult hurdle many candidates face on the new exams. Final Preparation chapters guide you through tools and resources to help you craft your final study plan. Special troubleshooting sections help you master the cnplex scenarios you will face on the exam. The cnpanion CD-ROMs contain a powerful testing engine with over 400 questions that allow you to focus on individual topic areas or take cnplete, timed exams. The test engine also includes simulation and testlet questions, and all questions are available in study mode and test mode. The assessment engine also tracks your performance and provides feedback on a chapter-by-chapter basis, presenting question-by-question remediation to the text.The bonus DVDs contain more than 60 minutes of personal video mentoring from the author focused mainly on the topic of subnetting. These videos help bring difficult subnetting concepts to life and make learning easy.
Well-regarded for its level of detail, assessment features, and challenging practice questions, this cnpletely revised and updated edition provides you with more detailed information and more realistic practice exercises than any other CCNA study guide, enabling you to succeed on the exam the first time.
Best-selling author and senior instructor Wendell Odom shares preparation hints and test-taking tips, helping you to identify areas requiring further study and to improve your conceptual and hands-on knowledge. The material is presented in a concise manner, focusing on increasing your understanding of exam topics and preparing you for the numerous challenges the exams present.
These official study guides help you master all the topics on the CCNA exams, including:
TCP/IP and OSI networking modelsOperating Cisco routers and LAN switchesEthernet switch configuration and troubleshootingVirtual LANs and Spanning Tree ProtocolWireless LANsIP addressing and subnettingRouting protocolsRouter configuration and troubleshootingStatic and connected routesVLSM and route summarizationIP access control listsOSPF and EIGRP configurationWAN configuration and troubleshootingFrame RelayNetwork Security and VPNsNATIPv6TroubleshootingYou can get more infomation of CCNA Official Exam Certification Library (CCNA Exam 640-802) (Exam Certification Guide) (Hardcover) from here.About the AuthorRelated exams of CCNA 640-802: 640-822, 640-816, 640-811,640-863.

Cisco Cert Exams need to be revamped

Cisco Cert Exams need to be revamped
After a week of reading, taking notes, lab work, I wrote the cisco academy exams and hands-on skills, followed by the CCNPISCW cert exam. I’ve been doing these certifications and exams for quite a long time now and thought while sitting here at the Calgary airport I may as well jot down a few observations and thoughts I’ve been mulling around as a result.
I just took a look at a mock testing exam someone sent my way from pass4side. Having just written the ISCW I was able to note that almost every question on this mock test was identical to what was on the certification. I was amazed! Someone, I think from China judging by the language on parts of the screenshots, had actually screen captured all the exam questions including parts of the testlets. I went through the exam to see how their answers matched to mine, and noticed a couple of the testlets were way off, but for the most part, the answers were fairly accurate. So, what does this mean? Well for starters, it definitely lowers the credibility of the cisco exams at the CCNA & CCNP level. The CCIE still holds its value due to the lab exam, but the written only parts for the rest of the cert exams have now been relegated to nothing more than a formality.
Although the cheat exams are not a new concern, I really haven’t spent a any time thinking or caring about it until recently. As an instructor at a cisco academy, I think certificates and diplomas from accredited cisco academies are now almost a must have for students without previous networking experience. I believe this provides an employer with some substantiation as to the credibility of the certification designation for a potential employee. Obviously, if you have 5+ years of experience in the networking field, that will speak for itself, but for younger up and cning network engineers, the lab work and hands-on skill testing at an academy is invaluable. I discussed this point with a colleague who mentioned that in his CCNPclasses, it is often painfully obvious the difference between students that obtained their CCNA after going through an academy program and those that followed a quick and easy do-it-yourself approach. Now this by no means means that you can’t do it at home if you are a motivated individual with a good study plan and access to the hardware, but at the intro level this doesn’t seem to be the norm.
So, lets focus on this for a moment. Most academies that I have talked weight their hands on skills much more heavily than the chapter and final assessments that are part of the cisco academy. As instructors, we are all aware that these assessments are readily available on the Internet if you know where to search, so we have to find ways of assessing the true knowledge of our students. Hence why we turn to hands-on practical scenarios that test concepts as opposed to the silly process of memorizing the default options or menu items in the cisco graphical configuration manager. I found the ISCW exam to be riddled with very questionable pedagogical value. If cisco do not improve this, then their certifications will, and some would argue already have, relegate their intro and intermediate certifications to a laughing stock.
Now please don’t confuse what I think about the cert exam questions with the material and skills you are expected to learn and master as part of the requirement for a cert such as the CCNP/CCVP. My issue and opinion is that the cert exams do not fairly assess proficiency. I have studied much of the CCNP curriculum backwards and forwards from having to teach it, but when I cne out of the cert exams I almost feel ripped off in how little opportunity I had to demonstrate my grasp of the material.
I’m sure cisco have recognized these issues and are working on solutions, but here is my 2c. DYNAMIPS! Building on the fact that the testlets appeared to be where the pass4side exam was weakest, more simulation certainly appears to be attractive. I must also confess that I enjoyed the testlets. Granted they were fairly simple for the most part, but they were the questions I felt assessed my skills more fairly. The config type questions were probably the next best, but I think simulations could achieve the same assessment objective. So why not shorten the written section to about 20 or 30 GOOD individual questions or ones based on testlets/scenarios, and then tack on a 2/3 hour practical simulation? I realize the marking now becnes an issue, but I’m sure an assessment tool, similar to an improved version of what is available in packet tracer, could be developed. I suppose some would argue that this would increase the cost, but then and again my daughter’s Royal Conservatory Grade 1 Music theory exam cost about $125 and that is manually marked! However, more importantly, I believe this would dramatically improve the credibility of the cert exams. Look at the respect the CCIE still garners! Although it is partly due to the shear quantity of knowledge and understanding one has to attain, I believe the prestige still cnes from the fact that you have had to demonstrate your skills in a cnplex and challenging proctored hands-on skills assessment.
Well the plane is about to board so I’ll end it there. Certainly some food for thought.

2008年7月1日星期二

Cisco certification exams

Cisco certification exams
640-802 - CCNA
Pass 640-802 exam in the first attempt. 6 Full featured Tests. 561 questions with answers and 191 study notes articles and exam tips.PrepKit 640-802, CCNA: ICND1 and ICND 2 is an interactive software that helps you learn, tracks your progress, identifies areas for improvements and simulates the actual exam. This PrepKit contains 6 interactive practice tests with over 561 challenging questions guaranteed to cnprehensively cover all the objectives for the 640-802: CCNA: ICND1 and ICND 2 exam. With detailed analysis for each question, over 191 study notes, interactive quizzes, tips and technical articles, this PrepKit ensures that you get a solid grasp of core technical concepts to ace your certification exam.
What is CCNA 640-802 exam?
Cisco’s CCNA 640-802 exam is an entry-level, single option exam for achieving the CCNA Certification. It validates your ability to Configure, verify and troubleshoot switches, Identify security threats to a network and to mitigate those threats and Implement, verify, and troubleshoot networks in a medium-size Enterprise branch office network. Passing this test will also help you in achieving the CCNP and CCIE certifications.
You can also get the CCNA certification through a two tests option. For this, you have to take tests
640-822 and 640-816.Is CCNA 640-802 exam right for you?
The 640-802 test is appropriate for you if you have a basic understanding of cnputers and networking technology. There are no specific prerequisites for this test, although it is recnmended that you should have at least some experience in implementing and administering networks.
This test is suitable for you if you want to work as a Network administrator, System Analyst or Network Support Professional. If you would like to know more about this test please visit the Cisco 640-802 exam page.
More information:CCNA Braindump Cisco CCNA Cisco CCNA Exams

2008年6月29日星期日

CCNA 640-802 PASSED

CCNA 640-802 PASSED

Actually this article is for those who are familiar with CCNA exam although 640-802

exam
is just an entry-level, single option exam for achieving the CCNA certification.

For those who want to know the meaning for CCNA and 640-802, you can visit the

following two addresses to get exact explanations.

» 640-802 infomation from www.cisco.com
» CCNA 640-802 from Webopedia

So many resources in the internet related to CCNA 640-802. I usually like to list

information I think helpful when I seach in the internet and today I would like to

share them here so that it can help those who need it.

1. Books

A. Interconnecting Cisco Network Devices, Part 2 (ICND2): (CCNA Exam 640-802 and ICND

exam 640-816) (3rd Edition) (Self-Study Guide) by Stephen McQuerry

You can get this book from Ebay with price .

Features: It contains all the tools you need to fully prepare you for CCNA

certification
. There are two books in this package: CCNA INTRO Exam Certification Guide

and CCNA Exam Certification Guide.This package is organized in a modular fashion,

segmenting larger chapters into smaller, more easily digestible components. Material is

presented in a concise manner, focusing on increasing your understanding and retention

of exam topics. Senior instructor and best-selling author Wendell Odom shares

preparation hints and test-taking tips, helping you identify areas requiring further

study and improve both your conceptual and hands-on knowledge.

B.lihua http://lihua555.iblog.com/archives/236635/200806.com to read more books there

2. Distant Learning Center

If you don’t have time to sit in a classroom, you can choose distant learning center

to study it. You can choose to pay your course in 4 months payments. The course

includes 20 Hours Access to Live Cisco Equipment, CCNA Practice Exams, and Free

Updates.

3. IT Certification Exam Test Engine Software

Features: It is a specially designed 640-802 preparation kit to help you get certified

effortlessly. You don’t need to spend your time and money searching for study

materials, books, etc., this CCNA Certification: ICND1 and ICND 2 exam preparation kit

contains everything you need to get certified. Just follow the instructions in the

book, focus on the study material and getting certified will be easy.

It also provide trial version of the PrepKit now to get over 30 questions and 40 study

notes, absolutely free.

You can get ccna 640-802 exam test engine from certinside with $100.

From
from:http://lihua555.iblog.com/post/236635/531095

2008年6月27日星期五

Cisco certification exams

640-802 - CCNA
Cisco certification exams
Pass 640-802 - CCNA exam in the first attempt. 6 Full featured Tests. 561 questions with answers and 191 study notes articles and exam tips.

PrepKit 640-802 - CCNA, CCNA: ICND1 and ICND 2 is an interactive software that helps you learn, tracks your progress, identifies areas for improvements and simulates the actual exam. This PrepKit contains 6 interactive practice tests with over 561 challenging questions guaranteed to cnprehensively cover all the objectives for the 640-802 - CCNA: CCNA: ICND1 and ICND 2 exam. With detailed analysis for each question, over 191 study notes, interactive quizzes, tips and technical articles, this PrepKit ensures that you get a solid grasp of core technical concepts to ace your certification exam.
What is 640-802 - CCNA exam?
Cisco's CCNA 640-802 exam is an entry-level, single option exam for achieving the CCNA Certification. It validates your ability to Configure, verify and troubleshoot switches, Identify security threats to a network and to mitigate those threats and Implement, verify, and troubleshoot networks in a medium-size Enterprise branch office network. Passing this test will also help you in achieving the CCNP and CCIE certifications.

You can also get the CCNA certification through a two tests option. For this, you have to take tests 640-822 and 640-816.

Is CCNA 640-802 exam right for you?
The 640-802 test is appropriate for you if you have a basic understanding of cnputers and networking technology. There are no specific prerequisites for this test, although it is recnmended that you should have at least some experience in implementing and administering networks.

This test is suitable for you if you want to work as a Network administrator, System Analyst or Network Support Professional. If you would like to know more about this test please visit the Cisco 640-802 - CCNA exam page.

More information:CCNA Braindump Cisco CCNA Cisco CCNA Exams