Total 4 Blogs

Created by - Stanley Avery

NAT vs PAT - Two Sides of a Coin

Network Address Translation (NAT) and Port Address Translation (PAT) are two common techniques for translating IP addresses. Both methods have benefits and drawbacks, which can make them better or worse for different situations. We are well aware that for some people, the differences between NAT vs. PAT might be confusing. On the other hand, if we begin with the descriptions of those terms, it would be easier to understand. Let's take a look at the differences. Pros and Cons of NAT NAT, or Network Address Translation, is a technology commonly used in networks to allow for the use of public and private IP addresses. Without NAT, every network device would need its unique public IP address, which can be scarce and expensive to obtain.NAT allows for a single public IP address to be shared among multiple devices with private IP addresses. This conserves public IP addresses and adds an extra layer of security as private IP addresses are not routed on the public internet. Advantages of NAT NAT essentially serves as a protective measure for registered public addresses and helps to prevent IP address space exhaustion. Addresses will no longer be renumbered when you switch networks. Address overlap happens much less frequently. Increased connection establishment flexibility. Disadvantages of NAT No end-to-end traceability Incompatible with some applications Path delays occur when switching Pros and Cons of PAT PAT, also known as port address translation, is an extension of network address translation (NAT). It allows a single public IP address to be used by multiple devices within a private network. This is accomplished by assigning each device a unique port number and routing incoming traffic accordingly. The main advantage of using PAT is that it helps to conserve scarce public IP addresses. In that sense, both NAT and PAT are similar. It also provides an added security layer since the traffic from a specific device can be easily identified by its port number. Additionally, PAT can also improve performance for certain applications, such as online gaming and video streaming. Overall, PAT is a useful tool for managing internet connections within a private network. Advantages of PAT IP addresses are conserved by using a single public IP for a group of hosts with different port numbers. By having a private address, you are lessening the chance of security flaws or attacks as opposed to if you had a public address. Disadvantages of PAT The internal table is limited to a specific number of entries to manage connections. In PAT, you cannot run more than one instance of the same public service from the same IP address. Different Types of NAT and PAT You might expect to see different types of NAT and PAT while researching the differences between NAT vs. PAT. Let's try to explain some of the different types of NAT and PAT... Static NAT is a type of Network Address Translation (NAT) that gives a fixed mapping between one internal IP address and one external IP address. This is in contrast to Dynamic NAT, which gives a different mapping each time it's used. Static NAT is useful for devices that need to have the same external IP address all the time, such as a web server. In static PAT, IP addresses and port numbers are changed, and the mapping between pre-translation and post-translation attributes is explicitly known. On the other hand, in dynamic PAT, the router decides this mapping every time. Final Words While the differences between NAT vs. PAT might sound confusing, they are actually pretty easy. They both have their benefits, and it is important to understand which one will work best for your specific needs. Hopefully, this article has helped you understand the differences between them and give you a few ideas on how to use them in your own network. If you need more professional support about network automation, you can check our network automation courses!

Published - Sun, 23 Oct 2022

Created by - Orhan Ergun

DEVASC Study Resources and Plan

DEVASC Exam for DEVNET Associate DEVASC Study Resources and Plan are available and detailed in the course of DEVASC 200-901 on out website. DEVASC Course and study plan The exam is not simple or foundational level, it is as always with Cisco, starts with you from scratch. up to a solid level where you are capable of discussing and implementing a solution. so studying and preparing should be careful and detailed as well. Even though the exam is considered a Written one, but preparation are almost 30% written only and by that i mean theoretical parts where you only get some concepts and leave, no implementations. SO 70% of the preparation should be practical, coding and validating a lot, constructing and encoding requests to communicate and work with Cisco platforms remotely. DEVASC and how to Study studying should be by constructing and validating every code for every request and platform of Cisco mentioned in the exam agenda. Constructing and sending API's and requests will be by using: Postman with XML, JSON, and YAML CURL request using Git Bash CLI Python Scripts from Python IDLE Validating the results will always be through the same construction and pushing platform mentioned above. Platforms are the once provided for FREE by Cisco through their Sandbox, and with the agenda request, it might be up to 30 different platform from Cisco to practice on. DEVASC Study tips to consider DO NOT study a code by "EYEs" only, this is very incorrect and probably will get you in a situation in the exam. when you will have to fill in the blanks a missing code, or you will have to drag and drop the code components in the correct order so that the code will work properly. ALSO something worth mentioning, in the course you will study how to authenticate to a platform, before starting to work with, and sending and receiving the requests and commands. STILL, the exam is mainly a written one, so understanding the theories and concepts is very important to answer and PASS.   Enjoy and get Certified.

Published - Thu, 17 Feb 2022

Created by - Orhan Ergun

How to Pass DEVASC

Cisco DEVASC Exam How to Pass DEVASC? the new exam from Cisco, first version released in 2019, having an exam code of 200-901 DEVASC Exam Content & Topics the exam generally has 6 modules to study and focus on, teaching you data encoding languages for the first time, introducing the Cisco Sandbox for practices, and start automation Cisco's platforms over the Sandbox. Skills learned with DEVASC many encoding, programming, and automation skills, including: XML, JSON, YAML API's SDK's NETCONF & RESTCONF IaC and CI/CD Python Git bash & Github Cisco Sandbox Cisco's Touch in DEVASC Exam the presence here for Cisco is not to just TEACH you DEVNET/DEVOPS but to allow you to implement and practice most of the tools/techniques on their platform using the FREE new sandbox service. DEVASC Exam Nature & Type the first and the current version of the exam has the code of 200-901 it is kind of a written exam, why kind of?, because the exam questions can be: MCQ's (single/multi answer multi choice questions) DnD's (Drag and Drops) Fill in the Blanks that is the tricky one, as you will have to fill in the blank the missing parts of a Code it should work normally after that, but the catch is that you can't verify or validate the code A total of 101-103 questions should be answered in a time of 120 minutes + 30 minutes for non-native English speakers. upon finishing the exam you will get a report with: result: either pass or fail exam statistics: how good you were per domain NO SCORE WILL BE SHOWN Enjoy and get Certified.  

Published - Thu, 17 Feb 2022

Created by - Orhan Ergun

What is DEVASC

What is DEVASC, a new question actually, DEVNET Associate from Cisco Systems is their first DEVOPS derived DEVNET certificate that was announced on June 9th - 2019. it is the first version of the DEVASC exam that grants the Cisco Certified DEVNET Associate certificate, and has the exam number of 200-901 DEVASC and DEVNET DEVASC was not the only exam announced from Cisco regarding DEVNET, an entire new domain of knowledge and hierarchy was there as well. DEVASCwould be your first step in that hierarchy, then you will see DEVNETProfessional which contains so many exams inside it. one of them is mandatory, and a selective one of the others is required to become a CCDevP, that will be for another blog. and the highest peak is the recently officially announced CCDevE, an 8-Hours LAB exam to validate how expert you are with Cisco DEVNET. Is DEVASC Important? not just because it is a fresh branch, or not something that is generally provided by other vendors, but because the agenda of the DEVASC are very useful. they do as always with Cisco, start from scratch telling you what is DEVOPS, DEVNET, DEVASC and start learning all the basics of: Data Encoding API's and SDK's Automating Cisco Platforms and of course the famous and most desired nowadays "Python" all from scratch, up to a level where you can use them well in a real environment and be eager to take the nextDEVNETstep to develop your automation skills even more. DEVASC and other Associate exams Nowadays, there are only 3 Associate exams and certificates from Cisco: Cisco Certified Network Associate Cisco Certified DEVNET Associate Cisco Certified CyberOps Associate The DEVASC and CCNA are related and one needs the other. Each of them had a specific module where it mentions and maybe practices the technologies of the other. That will be the "Automation & Programmability" module in the CCNA, and the "Network Fundamentals" module in DEVASC. But the CyberOps Associate is away from here, not a familiar topics with DEVNET.

Published - Thu, 17 Feb 2022