Port Numbers (26.4) This section covers how both TCP and UDP use port numbers to identify the proper application layer process. Multiple Separate Communications (26.4.1) As you have learned, there are some situations in which TCP is the right protocol for the job, and other situations in which UDP should be used. No matter what…
Deploy and configure Azure Bastion Service
Deploy and configure Azure Bastion ServiceGenerally, you connect to remote virtual machines with either RDP or SSH. To do so, you either need to assign a public IP address (with the RDP/SSH port exposed) to the VM to which you are trying to connect, or you need to provision an additional jump server, assign a…
UDP Overview – 100-150 Exam Guide
UDP Overview (26.3) The reliability and flow control features provided by TCP come with additional overhead related to the connection establishment and tracking whether or not segments were received. UDP is a transport layer protocol that is used when this kind of overhead creates unnecessary delay. For example, transaction-based protocols such as DNS or DHCP,…
Create and configure an application security group
Create and configure an application security groupApplication security groups (ASGs) are separate objects that you create in your Azure subscrip- tion. You can think of an ASG like a group object in an identity system–members of the group have the permissions and access that are assigned to the group. ASGs work in a similar way—…
TCP Overview – 100-150 Exam Guide
TCP Overview (26.2) As previously mentioned, both TCP and UDP are transport layer protocols. It is up to the developer to determine which of these protocols best matches the requirements of the application being developed. TCP establishes a connection proving reliability and flow control. TCP Features (26.2.1) This section gives more details about what TCP…
The Right Transport Layer Protocol for the Right Application
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…