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

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.

Anand software and training releases update on CCNA NETSIM.

 Network Simulators  Comments Off on Anand software and training releases update on CCNA NETSIM.
Feb 212017
 

 

http://routersimulator.certexams.com/network-simulator-designer.html

Anand software and training is releasing CCNA network simulator with designer with enhanced usability very shortly. The new features include the following :

  1. Ability to bookmark the labs so that a user would be able to return to the lab at a later time easily.
  2. Ability to mark the labs as 1) in progress,  2) yet to be completed,  and 3)Completed. A user would be able to readily identity the lab status by looking at the colour coding.
  3. In addition, a progress score has been implemented that indicates the extent of lab that has been completed.
  4. It is possible to save the configuration and return at a later time to complete the rest of the lab.

CCheck out the software here :

 

CertExams.com Updates Juniper® NetSim for JNCIA®

 Network Simulators  Comments Off on CertExams.com Updates Juniper® NetSim for JNCIA®
Jan 222017
 

CertExams.com recently updated its Juniper Network Simulator with Designer for JUNOS(TM) to include the following features:

  1. It is now possible for the users to:
    1. Bookmark the labs for reviewing later
    2. Color coding completed lab exercises, labs under progress, and labs yet to be attempted
  2. Progress bar: A progress bar indicates the extent of lab that has been completed, and what’s remaining. It indicates when the lab is successfully completed.
  3. A few bugs have been fixed

Download the software here:

http://routersimulator.certexams.com/juniper-sim/index.html

Disclamer: CertExams.com is not associated with Juniper Systems. Juniper, JUNOS are the trademarks of Juniper Systems and duly acknowledged.

SimulationExams.com Releases Cisco® CCENT™ Practice Tests

 Network Simulators  Comments Off on SimulationExams.com Releases Cisco® CCENT™ Practice Tests
Oct 162016
 

SimulationExams.com, examsims provider, released practice tests for Cisco CCENT™

The practice tests consists of 300+ most relevant questions with flash card explanation. The exam topics for CCENT are given below:

  1. Network Fundamentals 20% (weightage)
  2. LAN Switching Fundamentals 26%
  3. Routing Fundamentals 25%
  4. Infrastructure Services 15%
  5. Infrastructure Maintenance 14%

As it may be noted, the exam topics have been thoroughly revamped for the new CCENT exam. The exam code for CCENT is 100-105. CCENT, together with ICND2 contribute to CCNA certification. Alternatively, one can take CCNA certification exam directly by taking 200-125 exam.

Current exams:

Check out the website for the latest updates.

Disclaimer: SimulationExams.com is not associated with Cisco® Systems and CCENT™, CCNA™ are the trademarks of Cisco® and duly acknowledged.

India Successfully Launches GeoSynchronous Rocket To Put 2000+ kg Satellite in the Orbit.

 Network Simulators  Comments Off on India Successfully Launches GeoSynchronous Rocket To Put 2000+ kg Satellite in the Orbit.
Sep 182016
 

gslv-1On 8th September India put INSAT-3DR, an advanced weather satellite, weighing 2211 kg into Geostationary Transfer Orbit (GTO) using GeoSynchronous Satellite Launch Vehicle (GSLV-F05).

GSLV-F05 vehicle is configured with all its three stages including the CUS similar to the ones successfully flown during the previous GSLV-D5 and D6 missions in January 2014 and August 2015. GSLV-D5 and D6 successfully placed GSAT-14 and GSAT-6 satellites carried on-board in the intended GTOs accurately.

Hearty congratulations to the team behind the successful launch, and wish them all the best in coming years. India is proud of you!!

Photo Courtesy: http://www.isro.gov.in/

Read more here: http://www.isro.gov.in/launchers/gslv

 

CertExams.com Revises Its Juniper NetSim thoroughly.

 Network Simulators  Comments Off on CertExams.com Revises Its Juniper NetSim thoroughly.
Sep 032016
 

CertExams.com, a leading netsim software developer, released Juniper Network Simulator with Designer after a thorough review. The new version of the software includes several updates to its command support, and the lab exercises. The new features include Host to router/switch communication and/or router/switch to host communication and troubleshooting. Additionally, it supports DHCP configuration on routers and enables DHCP info to be obtained by the hosts connected via Juniper router/switch network.

You may download the software from the website here:

http://routersimulator.certexams.com/juniper-sim/index.html

The labs supported may be viewed here:

http://routersimulator.certexams.com/juniper-sim/labs/index.html

Disclaimer: Juniper JNCIA(R) is a registered trademark of Juniper Systems (R) and is duly acknowledged. Anand Software and Training or CertExams.com are not associated with Juniper Systems or any other company.

CertExams.com Updates LabSim for CompTIA® A+ Certification

 Network Simulators  Comments Off on CertExams.com Updates LabSim for CompTIA® A+ Certification
Apr 042016
 

certexamsCertExams.com, a leading NetSim and LabSim provider, recently updated it’s A+ Lab Simulator. The recent update includes several new labs as well as bug fixes. The details are the update are as given below:

  1. Net Features:
    1. Labs illustrating Windows 7 control panel features
    2. Labs showing setting up remote desktop, etc.
    3. Labs on creating/editing/deleting users/user groups and changing premissions.
  2. Bug Fixes:
    1. Labs 1 and 2 have been corrected to show proper connectors
    2. A few grammatical errors have been corrected

You may download the software here:

http://routersimulator.certexams.com/Aplus-labsim/CE_AplusLabSim.exe

The product detail is available here:

http://routersimulator.certexams.com/aplus-lab-simulator.html

The available labs may be viewed here:

\http://routersimulator.certexams.com/Aplus-labsim/labs/motherboard-aplus-lab-simulator.html

You may also be interested in Network+ Labsim

Disclaimer: CertExams.com is not associated with CompTIA® or any other company. All trademarks are duly acknowledged.