How Fiber Optics Work Fiber optics or optical fibers are made of pure glass which has about the diameter of a human hair. They are bundled into optical cables which can transmit light signals and can contain hundreds up to… Read More ›
Cisco 
What is an Ethernet Switch and Layer 2 Bridging Explained
Ethernet Switch – Layer 2 Switching and Bridging Comparison of destination MAC address and bridge table addresses If unknown source address, new entry in MAC address table with source port gets created If destination MAC address from same segment as… Read More ›
Open System Interconnect (OSI) and TCP/IP Network Layer Model
7 Layers of Networking in the OSI Model Compared to the TCP/IP Model Network layers enable us to break down functional steps in communication by program protocols. Think of protocols as the different steps in an assembly line. Computers communicate… Read More ›
Ethernet Cable
What is an Ethernet Cable Loosened electrons that do not move and have a negative charge are called static electricity. If these static electrons have an opportunity to jump to a conductor, this can lead to electrostatic discharge (ESD). Voltage… Read More ›
Ethernet Cable Speeds – Fiber Optic & Maximum Length
Ethernet Cable Installation Wave — energy or disturbance traveling from point A to B Amplitude — height of the wave (V) Period — amount of time that it takes to complete 1 cycle or period between waves (s) Frequency —… Read More ›
What is Data Communication
Data Communication and Networking Physical Topology Logical Topology Bus Ethernet –> Broadcast Ring Token Ring –> Token (Extended) Star Hierarchical Mesh Two examples of data communications networks that use token passing are Token Ring and Fiber Distributed Data Interface (FDDI)…. Read More ›
Network Interfaces – Network Interface Card (NIC)
Network Interface Card & Internet Connection Requirements Physical connection – modem or network interface card (NIC) allow the local network to connect to the Internet Logical connection – standard protocols are a set of rules and conventions defining how the… Read More ›
