Author: Arman Hasen

Cisco has announced 50% Off on all Exams fee!

Cisco Discount on exams

Cisco has officially announced a 50% off discount on all exam fee today which is valid till 16-May 2021. This is a very Good News for all students who have been planning to attempt their Cisco CCNA, CCNP-1 OR ENCOR exam recently. So, if you were planning to attempt the exam, then this is the best opportunity for you to avail this cisco discount offer. We have prepared a short video on this, plz watch it now. Official Cisco website (as shown in this video): https://learningnetwork.cisco.com/s/cisco-certifications-and-training-offers Please read all detail yourself from above Cisco official website. Below are some important Read More …

Network Architectures, SDN & Automation Quiz (ENCOR/CCNP)

        Also check our free Online Quizzes on all IT topics and CCNA, CCNP, CCIE including new Python Automation Programming. Free Online Quizzes (Best for Cisco CCNA, Huawei HCNA, N+) You can also view free study notes (Cheat sheets) on all IT and Cisco CCNA/CCNP/CCIE topics for long term memory: Networkwalks Summary Cheatsheets     Follow our Facebook Page & YouTube Channel for more updated Cheatsheets & Quizzes:  

IP Services Quiz (ENCOR/CCNP)

IP Services Quiz best for IT certifications like Cisco CCNA, CCNP, CCIE, Huawei HCNA, Juniper JNCIA, Microsoft MCSA/MCSE, …          More quizzes on all IT topics and CCNA, CCNP, CCIE including new Python Automation Programming. Free Online Quizzes (Best for Cisco CCNA, Huawei HCNA, N+) You can also view free study notes (Cheat sheets) on all CCNA/CCNP/CCIE topics for long term memory: Networkwalks Summary Cheatsheets   Follow our Facebook Page & YouTube Channel for more updated Cheatsheets & Quizzes like this IP Services quiz:  

WLAN Wireless Roaming & Authentication Quiz (ENCOR/CCNP)

WLAN Wireless Roaming & Authentication Quiz best for IT certifications like Cisco CCNA, CCNP, CCIE, Huawei HCNA, Juniper JNCIA, Microsoft MCSA/MCSE, …            More quizzes on all IT topics and CCNA, CCNP, CCIE including new Python Automation Programming. Free Online Quizzes (Best for Cisco CCNA, Huawei HCNA, N+) You can also view free study notes (Cheat sheets) on all IT and Cisco CCNA/CCNP/CCIE topics for long term memory: Networkwalks Summary Cheatsheets   Follow our Facebook Page & YouTube Channel for more updated Cheatsheets & Quizzes like this WLAN Wireless Roaming & Authentication Quiz:  

Wireless Signals Modulation Quiz (ENCOR/CCNP)

            Also check our free Online Quizzes on all IT topics and CCNA, CCNP, CCIE including new Python Automation Programming. Free Online Quizzes (Best for Cisco CCNA, Huawei HCNA, N+) You can also view free study notes (Cheat sheets) on all IT and Cisco CCNA/CCNP/CCIE topics for long term memory: Networkwalks Summary Cheatsheets Follow our Facebook Page & YouTube Channel for more updated Cheatsheets & Quizzes:  

Bit Error Rate & BERT Meter (part2)

Bit Error rate control & Bit Error testing (BERT) is crucial to network performance especially for Ethernet, SDH, DWDM and OTN Networks that are based on Optical transmission.   What is a BERT Meter (BER Tester)? A BERT Meter is an electronic device that is used to measure the Bit Error Rate. There are many equipment vendors that manufacturer that sell BER Testers. Some of the popular companies are JDSU, Anritsu and EXFO. However, their prices & features vary a lot. Below is one of the famous BERT Meter model as an example (courtesy JDSU).       How to Read More …

Bit Error Rate & BERT Meter (part1)

Bit Error Rate & BERT

Performance of the transmission system is of crucial importance to communication quality of the whole communication network. Good performance can be achieved through proper control over Bit Error Rate & BERT. The major factors affecting the performance of SDH transmission network includes bit error, jitter and wander. So, what are the Bit Errors? Why are they so important to control? Do the Bit errors affect my network performance? These are some of the questions that every network engineer and optical transmission engineer must know. Let’s dissect these questions & their answers one by one. “Bit Error is the amount of Read More …

IP Address & its Types

IP address types ipv4 ipv6

“IP address is a unique number which is used to identify network devices in computer networks”. An IP address mainly serves two functions: host or network interface identification and location addressing. It is a logical numeric address that is assigned to every single computer, printer, switch, router or any other device that is part of a TCP/IP based network. The IP exists in every network, even only a pair of computers or a network of a large enterprise. Each computer, without exceptions, has its own unique address, if there is a connection to the network. Each of the computers in Read More …

Application Layer of OSI Model (Layer-7)

Application Layer is the highest layer in seven layer OSI Model. It is responsible for End user Network Applications Management. This is the layer where real traffic data is generated in most of the cases. For example, this could be a web request generated from HTTP protocol or a command from telnet protocol. OSI Model divides the network communication processes into seven layers in order to simplify it. Each layer performs specific functions to support the layers above it. The seven Layer model starts from Physical Layer & goes till Application Layer on the top, as below in figure: Functions/Duties Read More …

Presentation Layer of OSI Model (Layer-6)

Presentation Layer of OSI Model

Presentation Layer is responsible for representation & formatting of data for session Layer in encapsulation process. It is the 6th Layer in the seven layer OSI Model after Session Layer. Presentation layer serves like a translator & takes care that the data is sent in such a way that the receiver will understand the information or data and will be able to use the data. OSI Model divides the network communication processes into seven layers in order to simplify it. Each layer performs specific functions to support the layers above it. This seven Layer model starts from Physical till Application Read More …