The Right Transport Layer Protocol for the Right Application (26.1.6) Some applications can tolerate some data loss during transmission over the network but cannot tolerate delays in transmission. For these applications, UDP is the better choice because it requires less network overhead. UDP is preferable for applications such as voice over IP (VoIP). Acknowledgments and…
Associate NSG to a subnet or network interface
Associate NSG to a subnet or network interface NSGs are used to define the rules for how traffic is filtered for your IaaS deployments in Azure. You’ve learned how to create NSG resources and define the NSG rules. However, these NSGs, by themselves, are not effective until they are associated with a resource in Azure….
Transmission Control Protocol (TCP)
Transmission Control Protocol (TCP) (26.1.4) IP is concerned only with the structure, addressing, and routing of packets, from original sender to final destination. IP is not responsible for guaranteeing delivery or determining whether a connection between the sender and receiver needs to be established. TCP is considered a reliable, full-featured transport layer protocol, which ensures…
Create an NSG using the Azure portal
Create an NSG using the Azure portalTo create an NSG using the Azure portal, follow these steps: FIGURE 4-24 Creating a network security group using the Azure portal FIGURE 4-25 The NSG Overview blade, showing the inbound and outbound security rules FIGURE 4-26 Adding an inbound rule to allow HTTP traffic
Transport Layer Responsibilities
Transport Layer Responsibilities (26.1.2) The transport layer has many responsibilities. At the transport layer, each set of data flowing between a source application and a destination application is known as a conversation and is tracked separately. It is the responsibility of the transport layer to maintain and track these multiple conversations. As illustrated in Figure…
Default rules – MS AZ-104 Exam Guide
Default rules All NSGs have a set of default rules. You cannot add to, edit, or delete these default rules. However, since they have the lowest possible priority, they can be overridden by other rules you create. The default rules allow and disallow traffic as follows: Table 4-5 shows the default inbound rules for each…
Transport Layer – 100-150 Exam Guide
Objectives Upon completion of this chapter, you will be able to answer the following questions: • What is the purpose of the transport layer in managing the transportation of data in end-to-end communication? • What are the characteristics of TCP? • What are the characteristics of UDP? • How do TCP and UDP use port…
Service tags – MS AZ-104 Exam Guide
Service tags Many Azure services are accessed via internet-facing endpoints. These endpoints can change over time, for example as new Azure regions are built. This makes it difficult to use NSG rules to control access to those services—it’s hard to identify the list of IP ranges to use, and even harder to keep the list…
IP Addressing Services Summary
IP Addressing Services Summary (25.3) The following is a summary of each topic in the chapter and some questions for your reflection. What Did I Learn in this Module? (25.3.1) In data networks, devices are labeled with numeric IP addresses to send and receive data over networks. Domain names were created to convert the numeric…
DHCP Services – 100-150 Exam Guide
DHCP Services (25.2) Dynamic Host Configuration Protocol (25.2.1) The Dynamic Host Configuration Protocol (DHCP) for IPv4 service automates the assignment of IPv4 addresses, subnet masks, gateways, and other IPv4 networking parameters. This is referred to as dynamic addressing. The alternative to dynamic addressing is static addressing. When using static addressing, the network administrator manually enters…