One of the first stages in the networked world of cisco is CCNA. There are many people who think that it is very simple and they don't learn without learning. Is CCNA really not very important and very basic? I think it is completely wrong.

    We know that network technology is actually not difficult. The hard part is how to break down some technologies into small knowledge points to understand and apply. If you follow the learning step by step, you will find that there are many problems in the actual work, but the solution is very simple. When the solution is proposed, several problems are raised, and at the same time new problems are The solution is very simple...so the problems are solved one by one, and the problems are discovered one by one... Network technology is like this, it is difficult because there are countless related The problems and techniques are waiting for you to solve and learn.

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    As an example of a VLAN, the problem arises from the problem of the broadcast domain collision domain and the waste of physical equipment in actual work. The solution is simple, logically dividing vlan on a physical device. It is very simple to solve, but it also brings the problem of data sharing broadcast domain in the same vlan between different devices... The solution is very simple, even if the two devices belong to the same vlan port A data line is ok. But the problem that arises is that when there are too many vlans, the connection between each vlan causes a lot of port waste. The solution is very simple. You can do a trunk. But the new problem is that it is impossible to distinguish the data flow in different vlans. The solution is very simple. It is ok to add the package when the data enters the trunk. It seems to be perfect but there are still problems. When the network is increased, it is a big difficulty for the administrator to do the same vlan on each device. The solution is very simple. It is enough to do a vtp domain for unified management. Wait a minute, etc... One problem occurs and one problem is solved.

    Hard? Not difficult. Just know how the problem is generated and how the problem should be solved. Then sort out the whole idea, it is not difficult at all. Therefore, the key to learning is the problem of methods.

    Inside CCNA is a way to teach you the basics of networking and how to learn about network knowledge. There are many people who don't care about ccna, don't care about lab operations, and choose to study their own books, but when they work, they find it hard to understand the actual use, so they feel that they can't start when they face network work and network failure.... .. This is the basis of not playing firmly.

Learning CCNA is very important! The important thing is that it is a framework for learning network technology in the future. It guides us how to continue to learn higher network technology and lay a solid foundation for future learning.

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Let's take a brief look at what CCNA is going to learn:

CCNA Certification (CCNA - Cisco Network Installation and Support Certification Assistant) is the first level of certification in the entire Cisco certification system, and it is also a prerequisite for CCNP certification, CCDP 300 320 certification and CCSP certification (CCIP certification, CCIE certification is not mandatory) And many Cisco Qualified Specialists also require candidates to get CCNA certification first.

    First, CCNA certification training

    CCNA certification is an entry-level certification for the Cisco After-sales Engineer Certification System. CCNA demonstrates that you have a basic knowledge of the network and can initially install, configure, and operate Cisco routers, switches, and simple LANs and WANs. CCNA certification means that certified personnel have the basic skills and knowledge to network in the small office/court office (SOHO) market. CCNA-certified professionals can install, configure, and operate LAN, WAN, and dial-up access services on small networks (100 or less nodes). The protocols they can use include (but are not limited to) IP, IGRP, IPX, Serial, Apple, Talk, Frame, Relay, IP RIP, VLAN RIP, Ethernet, Access Lists.

    Second, training skills

    Install, configure, and operate simple routing LANs, routing WANs, defining "simple" network content such as IP, IGRP, IPX, Serial, Apple, Talk, Frame Relay, IP RIP, IPX RIP, VLAN, Ethernet, and Access to the table, etc.

    Third, CCNA can provide solutions based on training and real-world experience:

    1. Install and/or configure a network;

    2, through the use of access to the directory;

    3. On-demand bandwidth (BOD) and on-demand dialing (DDR) features such as Internet access solutions that reduce bandwidth and reduce WAN costs, optimizing the WAN.

    4. Provide remote access through integrated dial-up connections and traditional remote LAN-to-LAN access and support for the highest levels of performance required for new applications such as Internet e-commerce and multimedia.

    Fourth, the prerequisites for obtaining CCNA certification

    Candidates do not need to hold any certificate to apply for CCNA, and there is no hard and fast rule on the age, education, and foreign language level of candidates.

    V. CCNA certification exam

    There are 2 exams for the exam now: 1. Take the 640-801CCNA exam; 2. Take the 640-821INTRO and 640-811ICND exams respectively.

ccna rs exam

    6. Validity of CCNA certification

    The CCNA certificate is valid for three years. After three years, you need to take the recertification exam. If you take a higher level of Cisco certification within two years, the validity period of the CCNA certification is automatically updated.

    Seven, CCNA recertification exam

    You must take the 640-811CND exam after the expiration date, or take any CCNP, CCIP, CCSP, exam, or take any exam with the prefix 642-XXX in the Cisco Qualified Specialist.

    CCNA training objectives

    After completing this course, students will achieve the following goals:

    Complete the device initialization configuration using the available configuration tools;

    According to the new requirements, new functions can be realized through additions, deletions and changes;

    Use the command line interface to determine network performance and status;

    Implement access layer switch configuration according to given requirements;

    Use the command line to implement VLAN, VTP, IEEEE802.1Q, and ISL configurations.

    Describe the functions and operations of static and dynamic routing protocols (RIP, OSPF, IGRP, EIGRP);

    Use the SHOW and DEBVG commands to determine the exception of the routing protocol.

    Ability to configure standard and extended access lists;

    Configure the serial interface (PPP, HDLC) using the command line interface.

I hope more people will join the world of the Internet. End with a sentence that: Pass CCIE RS 400 101 Exam? First read CCNA's book Guides three times.


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