About This Chapter
Network Infrastructure - Chapter Summary
You may understand that networks connect communication systems, but you may not know the specific details concerning what keeps these systems and networks running. This chapter will give you a thorough explanation of network infrastructure, from a discussion of systems logic and architecture, all the way to a look back at the first systems to send data long distances in real time. These lessons have been created with all skill levels in mind. More experienced individuals can use the chapter menu to identify which specific lesson topics to examine. Individuals who know very little about network infrastructure should consider going through each lesson one at a time to develop a fuller understanding of this concept. By completing the chapter, you will have sharpened your skills and be able to:
- Summarize how different topologies link computer networks within organizations
- Differentiate between logical and physical topology
- Critique the applications of wireless network modes
- Generalize SSH remote access
- Review alternatives to SSH
- Show the differences between SSH and Telnet
- Determine how to use SSH to access a server
- Establish the characteristics of an FTP connection
- Outline a SFTP client
- Evaluate WAN connectivity techniques
- Map out the history of ARPANET
1. How Star, Bus, Ring & Mesh Topology Connect Computer Networks in Organizations
Computers in a network are connected in some logical manner, referred to as network topology or network architecture. Learn about the different types of network architecture.
2. Physical & Logical Topology: Definition & Characteristics
How do we connect to network resources? In this lesson, we'll discuss physical and logical topologies, which are different ways of describing network connections. We'll also look at characteristics of some commonly used topologies.
3. Wireless Network Modes: Applications & Differences
Wired connectivity isn't the only way to go, as new connections often do without. In this lesson, we'll take a look at wireless networks, their uses, and some differences.
4. SSH Remote Access
We many not always have the ability to physically access a computer we need to work on. SSH, or Secure Shell, allows us to access that computer from a remote location, and to do so securely. In this lesson, we'll learn what SSH is and look at a few examples.
5. SSH Alternatives
The remote access of computers remotely is a very convenient facility. SSH is one of the more popular protocols, but in this lesson, we'll look at alternatives to SSH for remote access to computers. You'll learn about Telnet, Mosh and VPN, and why you might prefer one over the other.
6. Telnet vs. SSH
Both Telnet and SSH allow you to access a computer remotely. In this lesson, we'll learn about the differences between the two and their respective advantages, and also take a closer look at some of the features of SSH.
7. Accessing a Server Via SSH
Secure Shell (SSH) is a network protocol that gives users security in an unprotected network. SSH allows for remote access without having to sit at a computer and easy installation on common operating systems. In this lesson, we'll learn how to install SSH, use it to access remote servers, and more.
8. What is an FTP Connection?
This lesson will cover FTP (File Transfer Protocol) connections. This protocol is used to transfer files between computers. FTP connection types will be discussed (active and passive), an example of an FTP connection between client and server is shown, and a sample FTP client is presented.
9. What is an SFTP Client?
Ever wonder how to copy files between computers, or even why you would want to? What is FTP? What is SFTP? And what in the world is an SFTP Client? In this lesson, we will define these terms, compare FTP to SFTP, and explain the concept of an SFTP Client.
10. WAN Connectivity Techniques
Any company that has more than one location will benefit from WAN connectivity. There are multiple techniques to connecting a WAN ranging from full service to do-it-yourself.
11. ARPANET: Definition & History
ARPANET was the first proven concept of sending and receiving information regardless of geographical location in near real time. Developed under U.S. Advanced Research Projects Agency, a Department of Defense agency, ARPANET uses packet-switch technology in order to send and receive data with built-in error correction and package assembly. ARPANET was the first design of what has become known as the Internet today.
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