Have you ever received an email that was addressed to every person at your work or school? This was a broadcast email. Hopefully, it contained information that each of you needed to know. But often a broadcast is not really pertinent to everyone in the mailing list. Sometimes, only a segment of the population needs…
Cloud Economics – CLF-C02 Exam Guide
Cloud Economics One of the biggest factors driving the move to public cloud technologies like AWS is economics. Organizations become aware of several major factors that make a cloud move almost inevitable. In this part of the chapter, we break them down to ensure that you fully understand them, even if finance is not your…
Database Migration Service
Database Migration Service One of the many areas where AWS shines is in managed database services. For example, with AWS Relational Database Services (RDS), customers can rely on AWS to do the hard work of managing underlying servers for the hosting of massive customer databases. Is it any surprise that AWS also offers a fully…
Legacy Classful Addressing – 100-150 Exam Guide
In 1981, IPv4 addresses were assigned using classful addressing as defined in RFC 790 (https://tools.ietf.org/html/rfc790), Assigned Numbers. Customers were allocated a network address based on one of three classes, A, B, or C. The RFC divided the unicast ranges into specific classes as follows: • Class A (0.0.0.0/8 to 127.0.0.0/8) — Designed to support extremely…
Cloud Transformation Journey
Cloud Transformation Journey Migrating to the cloud can be a very complex set of tasks for an organization, and so the AWS Cloud Adoption Framework provides us with another valuable tool. It suggests a cloud transformation journey that consists of four phases, as shown in Figure 4-2. Figure 4-2 The Cloud Transformation Journey These phases…
Routing to the Internet – 100-150 Exam Guide
Most internal networks, from large enterprises to home networks, use private IPv4 addresses for addressing all internal devices (intranet) including hosts and routers. However, private addresses are not globally routable. In Figure 9-4, customer networks 1, 2, and 3 are sending packets outside their internal networks. These packets have a source IPv4 address that is…
Broadcast – 100-150 Exam Guide
Broadcast transmission refers to a device sending a message to all the devices on a network in one-to-all communications. A broadcast packet has a destination IP address with all ones (1s) in the host portion, or 32 one (1) bits. Note IPv4 uses broadcast packets. However, there are no broadcast packets with IPv6. A broadcast…
The AWS Cloud Adoption Framework
The AWS Cloud Adoption Framework As AWS continues to grow in scale and scope, more and more organizations realize that they should make a move to cloud technologies to stay competitive and perhaps even to expand and improve their business offerings. To help these organizations make the move to the AWS Cloud successfully, AWS offers…
Cost Optimization – CLF-C02 Exam Guide
Cost Optimization The goal of the cost optimization pillar is quite simple: to save money and stop wasting investments in technology. The design goals are also straightforward: Implement Cloud Financial Management (CFM): CFM refers to the set of practices, tools, and strategies that organizations use to manage their finances and control costs in the context…
Performance Efficiency – CLF-C02 Exam Guide
Performance Efficiency The performance efficiency pillar is concerned with the most efficient use of AWS resources possible. The efficiency should be maintained as demand changes and technology evolves. Here are the design goals around this pillar: Democratize advanced technologies (that is, make them available to the masses): Budgeting for massive amounts of storage and compute…