Most CCNA students are familiar with two privilege levels, which are the privilege level 1(user EXEC mode) and the privilege level 15(privileged EXEC mode). Cisco IOS software offers 16 privilege levels numbered from 0 to 15. The privilege level 0 is the most restricted level (you cannot configure anything and you cannot display the router configuration). The privilege level 15 is the least restricted (you can do anything on the router).
The Cisco IOS software gives you the ability to attach a set of command to each privilege level according to you network administrators’ needs. To secure access to a privilege level, you’ve to use the enable command in global configuration mode.
The enable command the following syntax:
enable {password | secret} [level level] {encryption-type encrypted-password}
In this article we”ll use a customized syntax of the enable command to set the password for the privilege level 15 as follows:
enable { password | secret } {password}
The enable secret command creates a highly secure password (the password is encrypted using a non-reversible encryption algorithm). But, the enable password command creates an unencrypted password unless the service password-encryption command is issued. The first command takes precedence over the second they are both configured on the router.
Note that the password is case sensitive and can contain up to 25 characters (uppercase and lowercase alphanumeric characters). Additionally, the password can have as first character a number. In these videos, you’ll to configure the enable password using both methods above.
Setting the password using enable password command
Use the following configuration to set the enable password using the enable password command. To remove the password use the no enable password command.
R1#conf t
R1(config)# enable password cisco
R1(config)# end
R1#
Setting the password using enable secret command
Use the following configuration to set the enable password using the enable password command. To remove the password use the no enable secret command.
R1#conf t
R1(config)# enable secret cisco
R1(config)# end
R1#
Note that if the enable password is not already set either using the enable password command or the enable secret command, and the console password is already configured, you”ll have to supply this password after you issue the enable command whenever you start a VTY session.
Related posts
Filed under study guides by on Mar 2nd, 2010. 
Following your computer training toward your career path, you can go for the CCNA certification (Cisco Certified Network Associate), which indicates a foundation in the apprentice knowledge of networking. CCNA training allows you the ability for installations and operation of LAN, WAN, and dialup access services for small networks with 100 nodes or less.
The Computer training program online consists of 2 sections; “Introduction to Network Engineering”, allowing the student to understand the world of network engineering, learning fundamental facts of data network theory and current technologies making the Internet tick.
The CCNA course includes, but not limited to use the different networking protocols such as Ethernet, Access Lists, Serial, IP, IGRP, Frame Relay, IP RIP, and VLANs. Cisco’s CCNA Prep Center Pilot offers simulations and sample questions, besides the e-learning modules and laboratories.
Computer training includes also valuable tips from CCNA professionals, in addition to expert advice, and encouragement through CCNA certification success stories. CCNA training does not require any prerequisite and makes available many other resources to help students with the preparation of their CCNA certification exams.
CCNA course, exams and recommended training include the Introduction to Cisco Networking Technologies (INTRO), the Interconnecting Cisco Networking Devices (ICND) or both. CCNA training and additional training, probably cover most of your career path expectations.
However, Cisco’s CCNA certifications are valid for 3 years, so it is necessary for additional computer training to re-certify. This is achieved by either passing the current CCNA exam at the moment of the original certification’s expiration, passing the ICND exam, passing the 642 professional levels.
CCNA training online focuses the coverage of Cisco router configuration procedures, mapped to exam objectives in order to prepare you for Cisco Exam 640-80, in partnership with major universities and colleges offering as well CCNA certification.
After CCNA training your can also re-certify by passing the Cisco Qualified Specialist exam, excluding the Sales Specialist exams, or passing a CCIE written exam, which is a re-certify form valid for individual who had a CCNA certification starting from October 1, 2004.
Cisco CCNA online training certification program, offers the same value, knowledge and skill earned on a traditional CCNA course, and it is a nationally recognized certification. With computer training online, you will gain knowledge of switched LAN Emulation networks, which are made up of Cisco original equipment.
The second section of the online CCNA course, “Practical Network Engineering”, is an approach to some of the most powerful networking technologies, involving extensive work on switches, Cisco routers, and firewalls in a simulated network environment, preparing students to earn the CCNA certification.
Related posts
Filed under study guides by on Feb 5th, 2010.
The CCNA® certification indicates a professional’s knowledge of and foundation in basic networking. This course incorporates content based on the objectives for the Cisco CCNA exam version 640-802 focusing on providing the skills and knowledge necessary to install, operate, and troubleshoot a small and medium branch office Enterprise network, including configuring several switches and routers, connecting to a WAN and implanting network security. A student should be able to complete configuration and implementation of a small branch office network under supervision. In order to prepare students to obtain the CCNA® certification credential, this program is comprised of content based on the stated objectives for this exam. Upon successful completion of this program, students should be prepared to sit for the Cisco® 640-802 certification exam.
Related posts
Filed under study guides by on Jan 27th, 2010.
Once upon a time, I was in Exambible. Yes, I know how difficult it is to get started with Cisco studies. But stick to it and I promise, the challenges will pay off handsomely. The CCNA is Cisco’s entry level certification exam, but it is not easy. And since the CCNA covers a wide array of topics, I have designed this course to help you tackle those diverse challenges.
The key to exam and job success is in the details. And most of those details are hard won from real world experience. Everything I am going to teach you, I wish someone would have taught me when I first started studying for my CCNA. At least you can benefit from my hard won experience and hopefully not repeat the same mistakes.
As with all Train Signal courses, I break down the theory and “real world” application of Cisco Networking. This exciting course contains nearly 29 hours of video instruction where I break down networking theory as you work hands on with real Cisco routers & switches… and build your own working network!
Related posts
Filed under study guides by on Jan 25th, 2010.
You deserve a hands-on Cisco CCNA training weekend training course which is fun, fantastic value, taught by friendly Cisco experts and contains the very latest strategies to guarantee your success in the CCNA exam. Discover how you can benefit from affordable, authentic hands-on CCNA training and see how like these people you can be successful in your CCNA exam using a new breakthrough training system.
Related posts
Filed under study guides by on Jan 25th, 2010.
Exambible is internationally acclaimed Cisco CCNA exam router simulation software that helps aspiring candidates prepare for the Cisco Certified Network Associate certification exam. Not only does it provide an understanding of networking concepts – through router simulation based virtual labs and practice tests, but also recreates an environment for real-life network configuration practice. It opens new vistas in personal flexibility and time management. SemSim provides you with a classroom quality-learning environment at an affordable price. Start a successful career as a Cisco certified network professional with SemSim now ! We even offer an online free CCNA Study center to provide some helpful articles on basic exam information.
Related posts
Filed under study guides by on Jan 25th, 2010.
Cisco has been known to the industry for its network appliances from last couple of decades. Cisco Certified Network Associate is now been simplified by its vendors. It has been classified into categories, providing the essentials now in even more details than before. In almost every networking related job, Cisco CCNA Certified Professionals are required and Cisco Certified Network Associate (CCNA) 3.0 certification is a must. If you are a beginner or a professional and are seeking career by becoming a Cisco CCNA 3.0 Certified Professional then we can help you achieve your goal. There are innumerous websites providing Cisco CCNA 3.0 Braindumps, CCNA 3.0 Practice Questions and Answers, CCNA 3.0 Practice Testing Software, CCNA 3.0 Preparation Labs and other Cisco CCNA 3.0 Certification Training Tools but we are the best you can ever get in return of your money.
Our Cisco Certified Network Associate (CCNA) 3.0 Training Tools and Cisco CCNA 3.0 Study Material is prepared by CCNA 3.0 Certified Professionals and CCNA 3.0 Certified Trainers who have carefully combined the Cisco CCNA 3.0 Study Material keeping in view CCNA 3.0 Exam Objectives. There can be no better way of preparing for your next Cisco CCNA 3.0 Cisco Certification Exam than by using our Cisco CCNA 3.0 Training Tools.
Self Exam Engine Training consists of but is not limited to CCNA 3.0 Practice Questions and Answers, CCNA 3.0 Audio Learning, CCNA 3.0 Preparation Labs and many more. With the help of our Cisco CCNA 3.0 Training Tools, you will get past your next CCNA 3.0 Certification exam hassle free. Our CCNA 3.0 Certification Training Tools and CCNA 3.0 Study Guides give you the best return for your money and are designed for optimum results.
Related posts
Filed under Cisco Exams, ccna certification, cisco certification, study guides by on Jan 22nd, 2010.
The network three-tier architecture:
1. Access layer: provide network access points, the corresponding equipment, the port is relatively dense. Major equipment: switches, hubs.
2. Convergence layers: access layer of the convergence point, able to provide the routing decision-making. To achieve security filtering, flow control. Remote access. Major equipment: routers.
3. Core layer: provides faster transmission speed, not the operation of the packet to do anything
================================================== ===============
OSI seven layer network model: Protocol data unit
1. Physical Layer: speed, voltage, pin interface type Bit
2. Data Link Layer: The data error detection, physical address MAC Frame
3. Network layer: routing (path selection), the logical address (IP) Packet
4. Transport Layer: reliable and unreliable transport services, re-transmission mechanism. Segment
5. Session Layer: distinguish between different applications of data. Operating system work in this layer DATA
6. Said layers: data encoding, encryption. DATA
7. Application Layer: User Interface DATA
Bit, Frame, Packet, Segment are all unified as: PDU (Protocol Data Unit)
================================================== ===============
Physical Layer:
1. Media types: twisted-pair, coaxial cable, optical fiber
2. Connector Type: BNC port, AUI port, RJ45 port, SC / ST Interface
3. Twisted pair transmission distance is 100 meters.
4.HUB Hub: a broadcast domain, a collision domain. Flooding forward. Shared bandwidth.
Direct Line: the host and switch or HUB Connection
Cross Line: switches and switches, switch and HUB Connection
All-trans line (Rollback): used to manage the CISCO network equipment to use.
================================================== ===============
Data Link Layer:
1. Switches and bridges 2. Switches and bridges of the number of segment (port) there are that many of the collision domain.
3. Switches and bridges all of the segment (port) in the same broadcast domain
================================================== ===============
Network Layer:
1. Routers 2. Routing path selection (routing policy). Routing Table 3. Wide Area Network access. 4. Routers broadcast the domain partition (partition).
================================================== ===============
Transport Layer:
1.TCP (Transmission Control Protocol), connection-oriented, with re-transmission mechanism, reliable transmission
2.UDP (User Datagram Protocol), no connections, no retransmission mechanism is not reliable transmission
3. Port number: available to the session layer to differentiate without the application data. Identity services.
================================================== ===============
show hosts display the current configuration of the host name
show sessions show the current out-of-TELNET session
clear lines clear line XXX
<ctrl> + <z> a direct return to the privileged mode
<ctrl> + <shift> + <6> + x
================================================== ===============
enable access to privileged mode
disable from a privileged mode back to user mode
configure terminal to enter the global configuration mode
interface ethernet 0 / 1 into slot 0 of the number of 1 Ethernet port
Mode exit Back to Top
end the direct return to the privileged mode
================================================== ===============
1. When the CISCO CATALYST series of switches, in the initialization could not find the “User Configuration” file, it will automatically load Default Settings (default configuration) file to the switch to initialize. To ensure that the switch works .2. CISCO Router in the initialization could not find the “User Configuration” file, the system will be automatically entered into the “Initialization configuration mode” (the system configuration dialog mode, SETUP mode, STEP BY STEP CONFIG mode, standby mode), does not work !
================================================== ===============
1.CONSOLE PORT (management console interface): distance restrictions, exclusive way.
2.AUX port (supporting management interface): can be articulated MODEM remote management, and exclusive way.
3.Telnet: more than a remote management (determined by the performance, VTY number of lines). Unsafe.
================================================== ===============
Immediate implementation, with immediate effect
================================================== ===============
hostname configuration Host Local Identity
r6 (config) # interface ethernet 0
r6 (config-if) # ip address 1.1.1.1 255.255.255.0
IOS version of the show version observe hours of work-related equipment, the list of interfaces
show running-config to view the current configuration of the entry into force of this configuration file is stored in the RAM
show interface ethernet 0 / 1 Ethernet interface see the status of working conditions and so on and so on …
================================================== ===============
reload Reload Router (restart)
setup manually enter the setup configuration mode
show history View history command (recently used order)
terminal history size <0-256> Set the command buffer size 0: on behalf of non-cache
copy running-config startup-config save the current configuration
Concept:
nvram: non-volatile memory, power-off information is not lost “- User Profiles <- startup-config
ram: random access memory, power off all this information is lost “- the current force configuration <- running-config
startup-config on each router or a switch to start time, will take the initiative loads
================================================== ===============
banner motd [char c] at the same time in order to [char c] Another line from the end of
description description interface annotations
(<ctrl> + <shift> + <6>) + x
For the console port to configure Password:
line conosle 0 into consolo 0
password cisco set a password for “cisco”
Set login password when you login
enable password <string> set up expressly to enable password
enable secret <string> to set the text of the enable secret password (priority to be used in the plaintext)
service password-encryption encryption system for all clear-text passwords (weak)
Set vtp line password (Telnet)
line vty 0?
password cisco
login
================================================== ===============
Configure the virtual loopback interface (loopback interface by default as the UP state)
inerface loopback? to create a loopback interface
ip address 1.1.1.1 255.0.0.0 interface IP address configuration
end withdraw from the interface
ping 1.1.1.1 test the effectiveness of the interface
no * to do to configure the reverse operation of
DCE / DTE only exists in the wide area network
show controllers serial 0 for viewing the properties of DCE and the DTE
DCE need to configure the clock frequency of the Router
clock rate? configured DCE interface clock frequency (system specified frequency)
Related posts
Filed under ccna certification, study guides by on Jan 16th, 2010.
Would like to verify the blessed comrades, and I help you lists all of the following should be completed CCNA certification, CCNP certification, CCIE certification experiment name. Empty lot of practice time ah!
Experiment 1: The Console port access Cisco Router
Experiment 2: Telnet access to Cisco routers
Experiment 3: Configure Terminal Server
Experiment 4: to access the router through a browser
Experiment 5: The mode switching, context-sensitive help and to see information about
Experiment 6: Using historical records, the system log and debugging tools
Experiment 7: Use Setup Mode to configure the router
Experiment 8: the router’s password settings and password recovery
Experiment 9: Managing configuration files
Experiment 10: backup and upgrade IOS Software
Experiment 11: Switch start and basic settings
Experiment 12: switch port and MAC address table settings
Experiment 13: VLAN, VLAN Trunk, VTP, and STP
Experiment 14: familiar with the commonly used IP-related commands
Experiment 15: static routing settings and related commands
Experiment 16: Using the loopback interface, the extended ping and trace
Experiment 17: Configuring CDP Protocol
Experiment 18: RIP basic configuration protocol
Experiment 19: Using RIP protocol for dealing with continuous sub-networks and VLSM
Experiment 20: IGRP with the basic configuration
Experiment 21: IGRP Protocol Advanced Configuration
Experiment 22: EIGRP protocol basic configuration
Experiment 23: Using EIGRP commands for monitoring and diagnosis of
Experiment 24: EIGRP Advanced Configuration
Experiment 25: ISDN basic configuration
Experiment 26: PPP authentication, DDR, and Multilink
Experiment 27: Configuring ISDN interface as a backup interface
Experiment 28: Configuring Frame Relay Switch
Experiment 29: Basic Frame Relay Configuration
Experiment 30: Configuring Frame Relay sub-interface
Experiment 31: IP Access Control List
Experiment 32: IPX Access Control List
Experiment 33: Configure and view the OSPF protocol
Experiment 34: Monitoring and Debugging OSPF protocol
Experiment 35: configuration and monitoring of a static internal source address translation
Experiment 36: configuration and monitoring of dynamic internal source address translation
Experiment 37: configuration and monitoring of re-using in-house NAT global address
Experimental 38:2950 switch to start and basic settings
Experiment 39: Configure VTP, VLAN, and VLAN Trunk
Experiment 40: Reverse telnet
Experiment 41: Configure an asynchronous interface and circuit
Experiment 42: Manually configure the modem
Experiment 43: Auto Configuration Modem
Experiment 44: Asynchronous line chat scripts
Experiment 45: Configure the remote router, an asynchronous link between the
Experiment 46: right modem verification and troubleshooting
Experiment 47: Configure PPP interactive session
Experiment 48: Configuring PPP Session Line
Experiment 49: Local interface: configuration ip unnumbered
Experiment 50: Give the remote dial-in host distribution of pre-assigned IP addresses
Related posts
Filed under ccna certification, ccnp certification, cisco certification, study guides by on Jan 14th, 2010.