Alias records Azure DNS offers integration with other services hosted in Azure via alias records. With conventional DNS records, you explicitly specify the target, such as the IP address of an A record. If the IP address changes, you need to update the DNS record accordingly. Using alias records, you can define the target of…
Transport Layer Summary – 100-150 Exam Guide
Transport Layer Summary (26.8) The following is a summary of each topic in the chapter and some questions for your reflection. Packet Tracer—TCP and UDP Communications (26.8.1) In this activity, you will explore the functionality of the TCP and UDP protocols, multiplexing, and the function of port numbers in determining which local application requested the…
UDP Communication – 100-150 Exam Guide
UDP Communication (26.7) Sometimes the reliability associated with TCP is not required or the overhead associated with providing this reliability is not suitable for the application. This is where UDP is used. UDP Low Overhead Versus Reliability (26.7.1) As previously explained, UDP is perfect for communications that need to be fast, like VoIP. This topic…
TCP Flow Control—Maximum Segment Size (MSS)
TCP Flow Control—Maximum Segment Size (MSS) (26.6.6) In Figure 26-27, the source is transmitting 1,460 bytes of data within each TCP segment. This is typically the Maximum Segment Size (MSS) that the destination device can receive. The MSS is part of the Options field in the TCP header that specifies the largest amount of data,…
Manage DNS records in Azure DNS
Manage DNS records in Azure DNS Each record in the domain name system includes the following properties: The collection of records in a DNS zone with the same name and the same type is called a resource record set. (These collections are also referred to as “RRSets” and as “record sets” in Azure DNS). Records…
TCP Flow Control—Window Size and Acknowledgments
TCP Flow Control—Window Size and Acknowledgments (26.6.5) TCP also provides mechanisms for flow control. Flow control is the amount of data that the destination can receive and process reliably. Flow control helps maintain the reliability of TCP transmission by adjusting the rate of data flow between source and destination for a given session. To accomplish…
Reliability and Flow Control
Reliability and Flow Control (26.6) Reliability and flow control are two of the main features of TCP, not present in UDP. TCP Reliability—Guaranteed and Ordered Delivery (26.6.1) The reason that TCP is the better protocol for some applications is that, unlike UDP, it resends dropped packets and numbers packets to indicate their proper order before…
Create and delegate a DNS Zone to Azure DNS
Create and delegate a DNS Zone to Azure DNS A DNS zone is a resource in Azure DNS. Creating a DNS zone resource allocates authorita- tive DNS name servers to host the DNS records for that zone. Azure DNS can then be used to manage those DNS records. DNS queries directed to those DNS name…
TCP Connection Establishment
TCP Connection Establishment (26.5.2) In some cultures, when two persons meet, they often greet each other by shaking hands. Both parties understand the act of shaking hands as a signal for a friendly greeting. Connections on the network are similar. In TCP connections, the host client establishes the connection with the server using the three-way…
DNS services in Azure – MS AZ-104 Exam Guide
DNS services in Azure There are several DNS-related services and features in Azure. An overview of each is given in the following list. The first three items are Azure services, which you consume by creat- ing service-specific resources that you will be billed for. The remaining three items are Azure features, which you configure using…