Diana Grams' Blog


Networking Fundamentals

Learning About Networking

I'm currently taking a course through WithYouWithMe Logo, it's a Networking Fundamentals course. This course is a foundational course that reviews the different components of a network, how they interact with one another, how data moves through a network, and how a smaller network connects to the wider internet.

Network Topologies:

  • A Network Topology is the way computer systems and network devices are connected to one another

Star Topology

  • The most common topology
  • All computers are connected to a central connection point, such as a hub or a switch
  • All data on a star network topology passes through the cental point before continuing to its destination and is commonly utilized within a LAN (Local Area Network)
Pro Con
If one computer failed or if ther was a break in the cable, the other computers would not be affected because each computer has their own cable Creates a single point of failure, if the central hub or switch fails, then all the computers on that central point would be affected

Bus Topology

  • Creates a network in which each of the computers and network devices are connected to a single cable or backbone
  • A backbone (within a Bus Topology) is the part of the network that ties different departmental networks, computers or devices into a single connection carrying the bulk of the data
  • In order for this set up to remain operational, there must not be any open connections including the ends that attach to the computers
  • If a computer is removed, added, or if the terminators are loose or missing the cable would be open and data would bounce back creating signal reflection
Pro Con
This topology is fairly cheap and easy to implement Requires the cable to be terminated at both ends of the topology

Tree Topology

  • The tree topology is a branching version of the bus topology
  • Each branch within the network is terminated to prevent signal reflection and data is passed to all devices attached to the network

Ring Topology

  • Creates a network where each computer is connected to each other creating the shape of a closed loop or ring
  • Every computer in the ring topology has exactly two neighbors for communication purposes
  • Each data packet is sent around the ring until it reaches it's final destination
Pro Con
Easy to install No longer practical
Easy to troubleshoot Creates a single point of failure

Mesh Topology

  • Creates a network where each computer or device on the network connects to every other computer or device on the network
  • Avoiding single points of failure through several connection points it's more unlikely to experience a loss
Pro Con
Great for WANs (wide area networks) Increased cabling and network device makes this topology more expensive
Provides a high-level redundancy network solution
No single point of failure

Hybrid Topology

  • Topologies can be combined with others
  • Most buisinesses use a form of hybrid topologies
  • The most common forms of hybrid topologies are the star ring topology and the star bus topology
  • In a star bus network topology two or more star topologies are linked together using a single bus connection
  • In a star ring network two or more star topologies are linked together to form a large ring network

Point-to-Point Topology

  • This topology has two hosts that are directly connected to each other using a single cable
  • These connections can be comprised of any network device or computer
  • The point set topology is the simplest of all the topologies

Clietnt Server Topology

  • Connects clients directly to a centralized dedicated server to access resources rather than connecting to each other
  • Commonly used in businesses instead of having to put all the resources on each computer
  • All clients can access resources as needed
  • Network administrators can manage their centralized resources allowing for easier management and higher efficiency

Point to Mulipoint Network Topology

  • Commonly used in wireless outdoor networks
  • A central wireless base station is utilized to connect additional wireless locations around it
  • In this topology the other wireless locations do not pass data between one another
  • The additional wireless locations are often referred to as clients while the base access point acts as the access point

Peer to Peer Topology

  • A network topology in which all the clients on the network pass data to one another sharing resources
  • This type of connection is often referred to as a workgroup
  • Simple to set up
  • Typically found in private resendences and small businesses