Certexams.com Switch Network Simulator Update

 Network Simulators  Comments Off on Certexams.com Switch Network Simulator Update
Feb 092019
 

CertExams - SwitchSimCertexams.com, a leading network simulator provider, updated it’s SwitchSim for iOS/JUNOS to include the following:

  • Explanation for the labs – Now most of the labs include explanation for the lab. New commands and functionalities have been explained in detail for ease of understanding.
  • Update to command sequence- Based on the user feedback, we observed that a few conditionalities are in conflict with execution of certain commands. The same have been fixed.
  • New labs – a few labs have been added.
  • Improved lab diagrams – Again, based on user feedback, some of the lab diagrams have been redone to provide clarity and readability.
  • Show commands – Several “show” command outputs have been added in the new version. It helps in understanding how to determine the configuration of the device after a particular set of configuration tasks have been followed.

About Certexams.com Switch Network Simulator (Switch Sim): It is a highly advanced virtual switch network simulator that simulates Cisco and Juniper switches in a networked configuration. Several protocols such as STP have been implemented for realistic simulation of switches. The software is primarily intended for beginners for learning purpose, and not intended for field applications or in production environment. The available labs may be found here:

http://routersimulator.certexams.com/switch-simulator-labs.html

Being a virtual device, the commands that are available for simulation is limited to the scope of CCNA/JNCIA. However, new commands and functionalities are added often as required to provide better user experience.

Other software available include Network Simulator for CCNA (CCNA Netsim), Juniper Network Simulator for JNCIA, Comptia A+ Labsim and Network+ labsim. Please check out the website for more details.

Certexams.com Updates Juniper Netsim for JNCIA (JUNOS)

 Network Simulators  Comments Off on Certexams.com Updates Juniper Netsim for JNCIA (JUNOS)
Apr 232018
 

Juniper Netsim for JNCIACertexams.com, leading netsim provideer, recently updated Juniper Network Simulator with Designer for JNCIA to include more labs. The recent labs include the following:

  • Connectivity check between Router and workstations
  • Pinging between two workstations
  • Pinging between two workstations on different subnet
  • Tracing route from workstation to router
  • Creating DHCP pool on EX series switches
  • Configure DHCP Server for multiple vlans in EX series switches
  • Vlan Scenario
  • Troubleshooting Lab with trunk functionality
  • Routing between vlans and ping test

The available labs may be viewed by going to http://routersimulator.certexams.com/juniper-sim/labs/index.html

To download the software, please visit Juniper Netsim Download page.

Related products;

About Juniper Netsim for JNCIA: The software provides a virtual networking environment with virtual routers, switches, and other networking components. Using the software, one should not only be able to run the existing ready made labs, but also design (using GUI configuration tool), configure and simulate a network. The software provides an affordable alternative to learn Juniper IOS commands and configuration without the need for any external hardware or software. There is no need for any JUNOS software to run the program as all the functionality like routing, STP, etc. is built into the software natively, the only limitation being the number of commands available for use. The software is specifically developed to help new comers desirous of learning networking using routers and switches.

About Certexams.com: The website provides network simulators and exam sims for various certifications including Cisco CCNA, CCNP, CCDA; Comptia A+, Network+, Juniper JNCIA, and others. We also offer labsims for Comptia A+ and Network+. Please visit the website Certexams.com for more information and available products.

Disclaimer: CertExams.com is neither associated nor affiliated with Juniper Systems® or any other company. Junos™ and JNCIA™ is trademarks of Juniper Systems® and duly acknowledged. The Simulator lab exercises material is a copyright of CertExams.com and the same is not approved or endorsed by respective certifying bodies.

CertExams.com Releases Network+ Examsim with Netsim

 Exam Simulators, Network Simulators  Comments Off on CertExams.com Releases Network+ Examsim with Netsim
Mar 212018
 

Certexams.com released Network+ Exam Sim with Netsim for Comptia Network+ exam preparation. The software contains the regular practice tests along with netsim for thorough preparation. With the recent introduction of performance based questions, the need for skill development has become important for passing the exam.

comptia network plus lab sim and exam simThe Net+ practice tests contain up to 400 questions with answers and flash card explanation for each question. The software provides both Learn mode for starters and Exam mode for advanced preparation. Other features include “full screen” mode, “night” mode, and “font” adjustment. The software provides detailed stats according to the exam objectives that help candidates put extra effort in improving the weak areas. The question database is updated from time to time to comply with the latest exam topics.

The Network+® Netsim provides a virtual networking and configuration environment, wherein, you can configure the network elements such as switches, routers, servers, and access points for various parameters and test the same for proper functionality. Networking labs offered include configuring WiFi routers, wireless access points (WAP), file and user access servers, and troubleshooting tools such as trace route and ping. More labs are added from time to time keeping in step with the changes in the exam objectives and the latest technologies.

Download the free demo version of the Network+ exam with labsim for free evaluation.

About Network+ certification: The certification is offered by Comptia® organization on passing required exam(s). Currently, one needs to pass only one exam for attaining this certification, which is exam number N10-007. The exam requirements are updated from time to time, and one needs to check with the official website for current requirements.

About Certexams.com: The website certexams.com offers network simulators such as CCNA Netsim and Juniper Netsim, and exam simulators such as Comptia A+ practice tests. A brand website of Anand Software and Training, is not associated with any other company.

Disclaimer: Comptia Network+® is a trademark of Comptia® organization and duly recognized. CCNA® is a trademark of Cisco® and duly recognized.

Simulationexams.com Releases Comptia A+ Exams with Labsim

 Exam Simulators, Network Simulators  Comments Off on Simulationexams.com Releases Comptia A+ Exams with Labsim
Mar 062018
 

SimulationExamsSimulationexams.com, leading practice tests provider, released ComptiaⓇ A+ Exam Sim with Labsim for A+ certification preparation. The practice tests consist of 100s of up to date questions with answers and explanations, thus providing you with exam-like questions in a timed environment. Flashcards provide domain knowledge related to the question topic. The practice tests offer all standard features like bookmarking, wrong answers review, category scoring, learn/exam modes, and details stats.

Comptia A+ exam sim with labsimThe labsim is an addition to the practice exams, providing hands-on exposure to various labs. With the introduction of performance based questions by Comptia, hands-on experience has become essential for passing the exam. The labsim provides dozens of labs for attaining the practical experience. The virtual nature of labs enable users to practice without having to procure real hardware or crashing one’s own computer due to in-appropriate control panel settings.

You may download the Comptia A+ Practice Exams with Labsim and install the free version (limited to fewer questions). Full version may be purchased online using program interface with immediate online activation after subscription.

About Comptia A+ Certification: For those who are new to the A+ certification, it’s a leading vendor neutral certification in the area of computer hardware and operating systems, offered by Comptia organization. The certification is divided into two constituent exams, namely A+ Essentials exam, and A+ Practical Application exam. One needs to pass both the exams to attain A+ Certification, and it’s valid for 3 years. A certified pro is expected to renew the certification by the end of 3 years. The topics covered by the certification exam include computer hardware like processors, memory devices, interfaces & connectors, computer peripherals like printers and scanners, computer operating systems (primarily Windows is covered), and troubleshooting hardware and OS problems. The certification is available via Prometric/View testing centers worldwide.

About Simulationexams.com: The website, a brand site of Anand Software and Training, is engaged in providing practice tests and lab simulators for various IT certs including Comptia A+, Network+, Security+, Cisco CCENT, CCNA, Juniper JNCIA, and others. Please visit the website for more information and available practice tests.

Disclaimer: Simulationexams.com is not associated or affiliated with ComptiaⓇ organization. Comptia A+Ⓡ, Comptia Network+Ⓡ. are the trademarks of ComptiaⓇ and duly acknowledged.

CertExams.com Updates Comptia A+ Exam Simulator

 Exam Simulators, Network Simulators  Comments Off on CertExams.com Updates Comptia A+ Exam Simulator
Jan 192018
 

CertExams.com has recently updated ComptiaA+ exam simulator with additional questions, and a few bug fixes. The practice tests provide first hand experience of what it might be when taking the actual certification exam. The software has two modes, Learn Mode and Exam Mode. For beginners, it is recommended to start with Learn Mode, and then work with Exam Mode.

A+ Certification is most widely known in the area of computer hardware and operating systems. One may obtain the certification, awarded by Comptia organization, by passing A+ Essentials and A+ Practical Application exams.

FAQ on A+ exam sim:

  1. How many questions are available with the practice tests?
    1. 500+ questions are available.
  2. What question types are supported?
    1. Similar to the actual exam environment MCQs, Drag-n-Drop, Hot Spot, Match-type questions are supported. Performance based questions are also provided.
  3. How long the certification is valid?
    1. CompTIA A+ certification are generally valid for three years from the date the candidate is certified. There are several ways to renew certification, including re-certification. Comptia has CE (short for Continuing Education) program that provides several paths for re-certification. Some of these include Completing CompTIA CertMaster CE, Passing a CompTIA recertification exam, earning a higher-level CompTIA certification or a non-CompTIA IT industry certification, or passing the latest release of your CompTIA exam. Please check with the Comptia website for complete and latest list of available options.
  4. Is it a dump of actual questions?
    1. No. The question bank is developed by authors having good industry experience with similar difficulty levels as that of the actual exam.
  5. Where do I get more information about the practice tests?
    1. Checkout the product home page:
      http://www.certexams.com/comptia/a+/a+essentials-exam-details.htm
  6. Do we get any labs for hands-on experience?
    1. Please check out our A+ Labsim for virtual lab environment, wherein you can practice dozens of labs.
  7. What other practice tests are available with you?
    1. Check out other exams: Network+ exam, Security+ exam, and Server+ exam.

Disclaimer: Certexams.com is not associated with ComptiaⓇ. Comptia a+, network+, and security+ are trademarks of ComptiaⓇ and duly acknowledged.

CertExams.com Updates CCNA NetSim for VPN and FHRP

 Network Simulators  Comments Off on CertExams.com Updates CCNA NetSim for VPN and FHRP
Dec 222017
 

CertExams.com released a thorough update to their flagship software, Network Simulator with Designer for CCNA® , to include functionality for the following:

  • Site to Site VPN configuration between routers
  • FHRP configuration

VPN (Virtual Private Network) is widely used these days for security and confidentiality of communication between hosts. The two main types of VPN are Site-to-site VPN and Remote-to-Site VPN. In Site-to-site VPN, a secure tunnel is formed between two peers within the communication channel. An example configuration scenario is shown in the figure below:

Photo Courtesy: Brocade.com, a leading networking equipment manufacturer.

As may seen in the exhibit, the VPN is configured between two routers. A site-to-site VPN is also called router-to-router VPN. The hosts on LAN are unaware of the VPN between routers V1 and V2. However, all the communication between routers V1 and V2 moves securely over OpenVPN tunnel. You typically need a NAT (Network Address Translation) to translate internal IP address 192.168.200.1 to external IP address 12.34.56.78 and vice versa (for incoming traffic). The same thing is done at router V2 also. The word “tunnel” may be a bit misleading some times. Note that there is no route and bandwidth allocated between the routers when a tunnel is formed. A VPN typically secures the communication channel but not the route or bandwidth. A VPN connections use 1) Encapsulation 2) Authentication, and 3) Data encryption.

In Encapsulation, user data (i.e. TCP/IP packets) is wrapped around by using encapsulation protocol such as GRE, IPsec, L2F, PPTP,  or L2TP. The encapsulated data packets are again wrapped inside carrier protocol packet, and then routed across the public network.

For site-to-site VPNs, the encapsulating protocol is usually IPsec or GRE (Generic Routing Encapsulation).  For remote-access VPNs, tunneling normally takes place using PPP (Point-to-Point Protocol). PPP tunneling will use one of PPTP, L2TP or L2F.

When using site-to-site VPN, any user can access remote site from any of the computers inside the firewall (local network). For this purpose, one needs to configure AAA (Authentication, Authorization, and Accounting), so that one needs to authenticate to access any resources at the other end of the VPN tunnel to restrict user access.

Remote access VPN is typically used with home and mobile users to connect to the corporate office. For example, a mobile traveler can connect to the Corporate head quarters using his laptop computer securely using a public Wi-Fi connection. Please see the figure below:

Photo courtesy: brocade.com, a leading networking equipment manufacturer.

As seen in the figure, a remote user communicates with the sever securely over VPN tunnel. All the user information, login credentials, etc. are encrypted when using VPN tunnel. In remote access VPN, usually, a client is installed on the remote user’s computer. Alternatively, the remote user uses SSL enabled browser session to communicate with the corporate network (shown as Private Network in the figure)

FHRP (First Hop Redundancy Protocol): Usually, when a subscriber connects to an ISP using Wi-Fi router, he will have single point of failure. i.e. if the router fails, the connection to the Internet fails. FHRP allows redundancy or a fail over mechanism, thus ensuring that there is no single point of failure for a subscriber to the Internet. There are several  protocol defined for FHRP, popular among these are: HSRP, VRRP, and GLBP.

HSRP, short for Hot Standby Router Protocol, is a Cisco proprietary protocol, and supported by most of the Cisco routers.

A simple HSRP configuration is shown in the figure. In HSRP, one router acts as an Active router and the other as Standby router. There can be more than two routers in HSRP configuration, however, only one router is put in Standby state using a selection criteria. HSRP routers may be assigned “Priority” so that a network admin can choose which router has be in HSRP Active state and which has to be in Standby state.

VRRP, short for Virtual Router Redundancy Protocol, is a standards based protocol. It is quite similar to HSRP in configuration and functionality.

GLBP, short for Gateway Load Balancing Protocol, is slightly advanced, in the sense, that it supports load balancing by default. Otherwise, it is similar to other two redundancy protocols.

CertExams.com CCNA Netsim, offers a virtual networking environment, where in, one can create a network with Cisco(R) routers, switches, and other networking elements and experiment. The software has a GUI based designer that allows drag-n-drop functionality for designing one’s own network. Several labs on HSRP, and site-to-site VPN have been added for hands-on practice. The software is intended for learning purpose with limited set of commands support.

List of available CCNA labs may be viewed by going to the product page. You may download the free demo version of the software by going to the product download page.

Disclaimer: CertExams.com is not associated nor affiliated with Cisco Systems, or Brocade. Cisco®, CCNA® are registered trademarks of Cisco Systems, and Brocade® is trademark of Brocade/Broadcom Limited and duly recognized.

First Hop Redundancy Protocols (FHRP) – A Primer

 Network Simulators  Comments Off on First Hop Redundancy Protocols (FHRP) – A Primer
Dec 082017
 

FHRP, short for First Hop Redundancy Protocol, is used at the customer premises for route redundancy.  Usually, you have a default gateway defined to your ISP (in case of connecting to the public Internet) or to your server (in the event you have an internal network). If the default gateway router fails, you will not be able to connect to the external resources unless a replacement is found and necessary configuration changes are made. First Hop Redundancy protocols will allow default gateway redundancy. With two or more default gateways defined using FHRP, in the event of a router failure there’s a backup router that will take place of the failed gateway, transparent to the user. The user’s host computer is configured with a virtual IP address and the switch between the redundant routers takes place without any user intervention. A typical configuration is shown in the figure below:

There are 3 types of FHRP protocols that are widely used:

  1. HSRP
  2. VRRP
  3. GLBP

Of the above three types of FHRPs, HSRP is Cisco proprietary protocol, where as VRRP is a standards based protocols. The two protocols HSRP (short for Hot Standby Router Protocol) is very similar to VRRP (Virtual Router Redundancy Protocol), except that VRRP is based on Open standards. When using HSRP, one router assumes the function of “Active” router and the other is known as “Standby” router. The routers communicate within themselves and when the active router fails, the standby router will kick-in. There can be more than two routers in a HSRP group.

GLBP, short for Gateway Load Balancing Protocol, is a bit different from HSRP and VRRP, in the sense, GLBP offers load balancing among the redundant gateways. However, note that HSRP and VRRP too offer load balancing using distinct “groups”, but load balancing is not native to HSRP and VRRP, where as GLBP, as the name implies, offers load balancing inherently.

FHRP is not to be confused with defining multiple gateway routers with a host’s network configuration file. A host computer may be defined with one or more default gateways, so that if one fails the other default gateway takes its position. In this case, the default gateways have different IP addresses, whereas in FHRP, the default gateway will have only one virtual IP address that is to be configured at the workstation.

Check out the router network simulator for practicing HSRP and VRRP labs.

References:

FHRP or “First Hop Redundancy Protocols”


Figure courtesy: https://www.engineerkhan.com/switch/hsrp-concept-notes/
HSRP – No longer for the weak of heart

Network Simulator w/Designer Update

 Network Simulators  Comments Off on Network Simulator w/Designer Update
Nov 292017
 

We are working on an update to NetSim for CCNA to include FHRP and VPN functionality. FHRP, short for First Hop Redundancy Protocol, is used to provide redundancy up to the ISP. There are several FHRP protocols, of which HSRP (Hot Standby Router Protocol),  GLBP (Gateway Load Balancing Protocol) and VRRP (Virtual Router Redundancy Protocol) are popular and being implemented in our NetSim.

Another addition would be VPN (short for Virtual Private Network) protocol that ensures encrypted tunnel between two end points. There are several types of VPN, of which Site-to-Site VPN and Site-to-Remote VPN are most widely used and being implemented. A Site-to-Site VPN is typically used between two offices (say head office and branch office) where as Remote-to-Site VPN is typically used by mobile commuters or smaller branch offices to connect to the head office.  A VPN, as you might be knowing, encrypts the communication between two end points as defined by the communicating hosts.

Check out for updates.

Yogi Adityanath is the CM of UP (India)

 Network Simulators, Others  Comments Off on Yogi Adityanath is the CM of UP (India)
Mar 272017
 

UP, India: Yogi Adityanath has been elected as the CM of Utter Pradesh state after recent landslide win by the BJP in state assembly elections. Given below are the decisions made by the CM during the first few days of his taking the position:
1. Strict implementation of ban on illegal slaughter houses. – Checked unhygienic conditions in dense market places,
2. Police officials are putting in extra hours in the streets of UP – No eve-teasing and improved law and order situation in the state.
3. Installation of biometric attendance at government offices – Improved attendance.
4. Ban on use of pan masala at government offices – Improved cleanliness in government complexes.
5. State roads to be pot hole free by June 15 – yet to see the results
6. Installation of cctv cameras in government offices – improved attandence
7. Both male and female police officers to be present in every police station – Confidence in public particularly female.
8. Officials not to take any files home, should clear files only in office, during office hours – a drive towards anti corruption in the state.

The above are a few to mention, and surely the state is going in the right direction.

Very best to the CM and all.

Certexams.com Netsim for CCNA Update

 Network Simulators  Comments Off on Certexams.com Netsim for CCNA Update
Mar 132017
 

Certexams.com updated netsim for ccna with the following:
1. Book marking of labs
2. Color coding labs so that a candidate would be able to identify labs that had been completed, under progress, and to be completed.
3. Progress indicator for a lab, which enables a user to view how much of the lab exercise has been completed and what is remaining.

Download the limited version of the netsim here:
CCNA Labsim

The labsim consists of dozens of exercises that provide handson experience in designing and configuring networks using Cisco routers and switches. Commands like ping, trace route and ipconfig are also supported.