THE AWS CERTIFIED ADVANCED NETWORKING – SPECIALTY EXAM OBJECTIVES COVERED IN THIS CHAPTER MAY INCLUDE, BUT ARE NOT LIMITED TO, THE FOLLOWING: Task Statement 3.1: Maintain routing and connectivity on AWS and hybrid networks. Industry-Standard Routing Protocols Used in AWS Hybrid Networks When creating a hybrid network with AWS, a standards-based routing protocol is required […]

Multicast Distribution Trees A multicast distribution tree (MDT) represents the path that multicast data takes between the routers that connect sources and receivers. The multicast software builds different types of trees to support different multicast methods. A source tree represents the shortest path that the multicast traffic takes through the network from the sources that transmit […]

Note Changing the query interval can severely impact multicast forwarding. When a multicast host leaves a group, a host that runs IGMPv2 or later sends an IGMP leave message. To check if this host is the last host to leave the group, the software sends an IGMP query message and starts a timer that you […]

Further Reading For additional information on the AWS shared responsibility model and the underlying foundation of AWS security, please look at the following resources: Exam Readiness Drill – Chapter Review Questions Apart from a solid understanding of key concepts, being able to think quickly under time pressure is a skill that will help you ace […]

Breaking Down a UTP Ethernet Link Note If available, find a nearby Ethernet UTP cable and examine the connectors closely. Look for the pin positions and the colors of the wires in the connector. To complete the physical link, the nodes each need an RJ-45 Ethernet port that matches the RJ-45 connectors on the cable so […]

The final operator you should be familiar with for the exam is the conditional operator, The first operand must be a boolean expression, and the second and third operands can be any expression that returns a value. The ternary operation is really a condensed form of a combined if and else statement that returns a […]

9.4 @TestSetup Method Here’s an example that demonstrates the usage of @TestSetup: @isTest private class ContactTriggerTest { @TestSetup static void setupTestData() { // Create a test account Account testAccount = new Account(Name = ‘Test Account’); insert testAccount; // Create a test contact without setting standard field values Contact testContactWithoutValues = new Contact( FirstName = ‘John’, […]

AWS Budgets and Billing Alarms In the third step, you can set up alerts. These alerts can be used to notify you if you are getting close to your budget maximum. Alerts can be either mailed to individuals, sent via Amazon SNS (Simple Notification Service, which can be used as a text-messaging service), or via […]

Transmitting Data Using Twisted Pairs While it is true that Ethernet sends data over UTP cables, the physical means to send the data uses electricity that flows over the wires inside the UTP cable. To better understand how Ethernet sends data using electricity, break the idea down into two parts: how to create an electrical […]

Internet Group Management Protocol IGMPv3 includes the following key changes from IGMPv2: IGMPv3 supports source-specific multicast (SSM), which builds shortest path trees from each receiver to the source, through the following features: Host messages that can specify both the group and the source. The multicast state that is maintained for groups and sources, not just […]