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Week Five: Cloud Networking

 

 

This week objectives covered an array of topics like, Networking Concepts in the Cloud, which is in conjunction to, Networking Concepts, From OSI Model to Cloud Stack, and Software-Defined Networking in the Cloud to IP Address Space, also in conjunction also to IP Addressing, Subnetting, Cloud Network Interfaces, and many more.

Let’s dive into discussing some little but important aspects and details that are associated with some of the topics listed above. You can always pursuit other articles throughout the Internet to be better orientated for your preferences.

Networking Concepts in the Cloud

1.      The OSI Model to Cloud Stock:

The OSI (Open System Interconnection) Model and the TCP/IP (Transmission Control Protocol/Internet Protocol) Model have some similar features and operations, just like every other technology we utilized. The TCP/IP and the OSI models work hands-in-hand to allow the flow of communication on any given network, and the diagram above shows how communication transpires. The OSI Model has a total of seven layers (protocols), and the TCP/IP Model has a total of four layers, - three less than OSI, but more powerful with greater efficiency.



Regardless of whether in the OSI model or the TCP/IP model, the process of adding additional information to a document (data) as it travels down from layers-to-layers in computer networking is considered as encapsulation. Think of encapsulation as working on an assembly line in a bakery where all employees on that assembly line are assigned to add an ingredient on dope as the dope role down the conveyor line. Encapsulation is the process of accomplishing various tasks (each layer adds a header) to maintain information (communication) as it travels downward from layers to layers until it reaches its destination.  

IP Address Spaces

1.      IP Address:

In an on-perm (company owned) network, DHCP (Dynamic Host Configuration Protocol) server can be configurated for the purpose of normally assigning private IP addresses, while it is automatic in cloud IP address assignment. It is informative to know that “Private IP addresses are assigned chronologically from specific IP address ranges that are defined when you create the virtual network and its subnets.” The concept for implementing the proper applications (practices) for IP “address allocation on private network” is RFC (Request for Comments) 1918 and was published February of 1996 by IETF (Internet Engineering Task Force). More details on RFC 1918 can be found at: https://datatracker.ietf.org/doc/html/rfc1918 which identifies three IP address space blocks that are reserved by IANA (Internet Assigned Numbers Authority) for private networks use, “including private networks hosted in the cloud.” These blocks of reserved IP address space are:

Class of networks

Start address

End Address

Prefix

Subnet mask

Class A network

10.0.0.0

10.255.255.255

10x.x.x/8

255.0.0.0

Class B network

172.16.0.0

172.31.255.255

172.16.x.x/12

255.240.0.0

Class C network

192.168.0.0

192.168.255.255

192.x.x/16

255.255.0.0

 

 

 

 

 

Reference

West, Jill. (2023). CompTIA Cloud+ Guide to Cloud Computing (p. 133). Kindle Edition. Retrieved: October 5, 2023.

  

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