User-defined routes In some cases, you will want to configure the routing of packets differently from what is pro- vided by the default system routes. One of these scenarios is when you want to send traffic through a network virtual appliance, such as a third-party load balancer, firewall, or router deployed into your VNet from…
Network Layer Summary
Network Layer Summary (22.4) The following is a summary of each topic in the chapter and some questions for your reflection. What Did I Learn in this Module? (22.4.1) • Network Layer Characteristics—The network layer, or OSI Layer 3, provides services to allow end devices to exchange data across networks. IPv4 and IPv6 are the…
IPv6 Packet Header
IPv6 Packet Header (22.3.4) The fields for the IPv6 packet header shown in Figure 22-10 are as follows: • Version —This field contains a 4-bit binary value set to 0110 that identifies this as an IP version 6 packet. • Traffic Class — This 8-bit field is equivalent to the IPv4 Differentiated Services (DS) field….
IPv6 Packet – 100-150 Exam Guide
IPv6 Packet (22.3) This topic introduces the successor of IPv4: IPv6. Limitations of IPv4 (22.3.1) IPv4 is still in use today. This topic is about IPv6, which will eventually replace IPv4. To better understand why you need to know the IPv6 protocol, it helps to know the limitations of IPv4 and the advantages of IPv6….
Outbound internet connections
Outbound internet connections When a public IP address is assigned to a virtual machine’s network interface, outbound traffic to the internet will be routed through that IP address. The recipient will see your public IP address as the source IP address for the connection. However, the virtual machine itself does not see the public IP…
IPv4 Packet Header Fields
IPv4 Packet Header Fields (22.2.2) The binary values of each field identify various settings of the IP packet. Protocol header diagrams, which are read left to right, and top down, provide a visual to refer to when discussing protocol fields. The IP protocol header diagram in Figure 22-7 identifies the fields of an IPv4 packet….
Media Independent – 100-150 Exam Guide
Media Independent (22.1.7) Unreliable means that IP does not have the capability to manage and recover from undelivered or corrupt packets. This is because while IP packets are sent with information about the location of delivery, they do not contain information that can be processed to inform the sender whether delivery was successful. Packets may…
IP Encapsulation – 100-150 Exam Guide
IP Encapsulation (22.1.3) IP encapsulates the transport layer (the layer just above the network layer) segment or other data by adding an IP header. The IP header is used to deliver the packet to the destination host. Figure 22-2 illustrates how the transport layer PDU is encapsulated by the network layer PDU to create an…
Network Layer – 100-150 Exam Guide
Objectives Upon completion of this chapter, you will be able to answer the following questions: • How does the network layer use IP protocols for reliable communications? • What is the role of the major header fields in the IPv4 packet? • What is the role of the major header fields in the IPv6 packet?…
Public IP address prefixes – MS AZ-104 Exam Guide
Public IP address prefixesWhen using multiple public IP addresses, it can be convenient to have all of the IP addresses allocated from a single IP range or prefix. For example, when configuring firewall rules, this allows you to configure a single rule for the prefix, rather than separate rules for each IP address.To support this…