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…
IPv4 and Network Segmentation
Objectives Upon completion of this chapter, you will be able to answer the following questions: • What are the characteristics and uses of the unicast, broadcast and multicast IPv4 addresses? • What are public, private, and reserved IPv4 addresses? • Can you explain how subnetting segments a network to enable better communication? Key Terms This…
Reliability – CLF-C02 Exam Guide
Reliability The reliability pillar consists of many important design principles that all focus on ensuring that your design can easily recover from service failures. It also ensures that your architecture can grow resources as needed on demand. Reliability in the cloud also means that disruptions can be mitigated with relative ease. Sound great? It is….
The IPv4 Address Structure
IPv4 addresses have a structure that identifies makes the address unique as well as identifying the network the address belongs to. Networks and Hosts (8.2.2) The logical 32-bit IPv4 address is hierarchical and is made up of two parts, the network and the host. In the figure, the network portion is blue, and the host…
The Internet Protocol – 100-150 Exam Guide
Objectives Upon completion of this chapter, you will be able to answer the following questions: • What is the purpose of an IPv4 address? • How are IPv4 addresses and subnets are used together? Introduction (8.0) Kishori is learning a lot from Rina! She understands that when she sends or receives a package in the…
The MAC Address Table
What happens when the switch receives a frame addressed to a new host that is not yet in the MAC address table? If the destination MAC address is not in the table, the switch does not have the necessary information to create an individual circuit. When the switch cannot determine where the destination host is…
Ethernet Hubs – 100-150 Exam Guide
The original Ethernet networks connected all hosts with a single cable, similar to how cable TV cables are connected in your home. All users on the network shared the bandwidth available on the cable. As Ethernet networks became more popular, connecting everyone on a single cable was no longer practical, nor even possible. Engineers developed…