Relational Operators We now move on to relational operators, which compare two expressions and return a boolean value. Table 2.8 describes the relational operators you need to know for the exam. TABLE 2.8 Relational operators Operator Example Description Less than a < 5 Returns true if the value on the left is strictly less than […]

Active Directory Active Directory provides a centralized management application for Microsoft Windows computers and user administration. The AD architecture is a distributed hierarchical database for information about your IT infrastructure, containing configuration and management for users, user credentials, and access rights based on group memberships, DHCP, policy management, DNS zones and records, applications and devices, […]

OSI Networking Model and Terminology At one point in the history of the OSI model, many people thought that OSI would win the battle of the networking models discussed earlier. If that had occurred, instead of running TCP/IP on every computer in the world, those computers would be running with OSI. However, OSI did not […]

Limitations of VPC Peering Although VPC peering is relatively easy to understand and implement, there are some limitations that you must be aware of as well: The preceding list was of the most prevalent rules. For a complete list of VPC peering limitations, visit the following URL: https://packt.link/Jkkhv. Using Transit Gateway to Connect VPCs Transit […]

Configure management groups Management groups can also be used to apply Azure RBAC to a subscription. Using man- agement groups, you can apply governance consistently across subscriptions, including the application of common RBAC controls and the application of Azure Policy, as discussed later in this chapter. Within management groups, subscriptions can be organized in a multi level […]

Cost Allocation Tags A cost allocation tag starts as a regular resource tag. Typically, these tags can be assigned when creating a resource or after the resource has already been created. For example, Figure 14.1 demonstrates tags being assigned to an EC2 resource as it is being created, whereas Figure 14.2 demonstrates tags being assigned to an […]

Return Value of Assignment Operators One final thing to know about assignment operators is that the result of an assignment is an expression in and of itself equal to the value of the assignment. For example, the following snippet of code is perfectly valid, if a little odd-­looking: long wolf = 5; long coyote = […]

Note The dynamic AS number prefix peer configuration overrides the individual AS number configuration that is inherited from a BGP template. To establish BGP sessions between peers, BGP must have a router ID, which is sent to BGP peers in the OPEN message when a BGP session is established. The BGP router ID is a […]

Assign administrator permissions Azure has many different roles for managing access to Azure resources. These include classic subscription administrative roles like Account Administrator, Service Administrator, or Co-Administrator, as well as Azure role-based access controls (RBAC) that are available in Azure Resource Manager (ARM). Note that classic roles and resources are scheduled to be deprecated in […]

Remove resource groups In Azure, you can delete individual resources in a resource group, or you can delete a resource group and all its resources. Deleting a resource group also deletes all the resources contained within it in one operation. When deleting resource groups, exercise caution because the resource group might contain resources that other […]