Chapter 7: Networking= Connecting Computing Devices Nikki Schnelker
What is a Computer Network? A computer network is simply two or more computers that are connected via software and hardware so they can communicate with each other. What is a Computer Network? Benefits of networks are sharing an internet connection, sharing printers (and other peripherals), sharing files, and common communications.
Nodes Each device connected to a network is a node. A node can be a computer, a peripheral such as a printer or game console, or a network device such as a router.
Fiber-optic cable: is made up of plastic or glass fibers that transmit data at extremely fast speeds Twisted-pair cable: is made up of copper wires that are twisted around each other and surrounded by a plastic jacket Coaxial cable: Consists of a single copper wire surrounded by layers of plastic. If you have cable TV, the cable running into your TV or cable box is most likely a coaxial cable Types of cables An Unshielded Twisted-pair cable (UTP) is used for networks and is composed of four pairs of wires twisted around each other to reduce electrical interference
Types of cables continued Which type transmits data the fastest? Fiber optic Which type is used for normal telephone cable? Twisted- pair cable Photo of fiber optic cable
Data Transfer Rate What is another name for data transfer rate? Bandwidth Data transfer rate, or bandwidth, is the maximum speed at which data can be transmitted between two nodes on a network.
Throughput What is it? How is it measured? the actual speed of data transfer that is achieved. How is it measured? Both data transfer rate and throughput are usually measured in megabits per second (Mbps). Throughput Throughput is always less than or equal to the data transfer rate.
Concept of Network Neutrality If you posted a blog on the Internet, it would have the same opportunity of being accessed as a new on-demand movie from Verizon or an online sale at Target. This is because data on the internet is treated equally. There has been no differentiation by the type of user, the content that is being uploaded, or by the mode of communication. Concept of Network Neutrality Where I stand- its good but confusing
Watch video
How Are Networks Classified? Classified: The distance between nodes on a network is one way to describe a network. How Are Networks Classified? How does the distance between nodes define a network?
5 Common Types of Networks 1. Personal area network (PAN) Ex. Smartphones 2. Local area network (LAN) Ex. Computer Lab 3. Home area network (HAN) Ex. Television 4. Metropolitan area network (MAN) Ex. WIFI networks 5. Wide area network (WAN) Ex. All the connected LANS (such as a school with multiple campuses with LANS that are connected with telecommunications lines) 5 Common Types of Networks Personal- always with you Local- used with only locals Home- multiple devices linked with one single house Metropolitan- multiple devices all throughout the city linked together Wide- multiple devices throughout the country (or beyond) linked together
Chart of LAN-WAN