PDF Drive is your search engine for PDF files. . Tools for teaching computer networking and hardware concepts / Nurul Sarkar, editor Section IV Tools for. Product or company names used in this book are for identification purposes only. Tools for teaching computer networking and hardware concepts / Nurul. There are many books on computers, networks, and software engineering but none that integrate the three with applications. Integration is.
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Edited Book. Sarkar, N.I. () “Tools for Teaching Computer Networking and Hardware. Concepts” Hershey PA, USA: Information Science. NOT FOR REDISTRIBUTION. The Hardware Book is freely distributable but is copyrighted to Joakim Ögren. find any major visual errors. You will find the online version and the latest PDF version at HwB . Networking: Ethernet 10Base-T. to enhance teaching and learning computer networking and hardware appears in the book, Tools for Teaching Computer Networking and Hardware Concepts.
A typical WAP might have the theoretical capacity to connect hundreds or even thousands of wireless users to a network, although practical capacity might be far less. Nearly always servers will be connected by cables to the network, because the cable connections remain the fastest.
Workstations which are stationary desktops are also usually connected by a cable to the network, although the cost of wireless adapters has dropped to the point that, when installing workstations in an existing facility with inadequate wiring, it can be easier and less expensive to use wireless for a desktop. See the Topology , Cabling , and Hardware sections of this tutorial for more information on the configuration of a LAN.
Dedicated transoceanic cabling or satellite uplinks may be used to connect this type of global network. Using a WAN, schools in Florida can communicate with places like Tokyo in a matter of seconds, without paying enormous phone bills. Two users a half-world apart with workstations equipped with microphones and a webcams might teleconference in real time.
A WAN is complicated. It uses multiplexers, bridges, and routers to connect local and metropolitan networks to global communications networks like the Internet. Advantages of Installing a School Network User access control.
Modern networks almost always have one or more servers which allows centralized management for users and for network resources to which they have access. User credentials on a privately-owned and operated network may be as simple as a user name and password, but with ever-increasing attention to computing security issues, these servers are critical to ensuring that sensitive information is only available to authorized users.
Information storing and sharing. Computers allow users to create and manipulate information. Information takes on a life of its own on a network. The network provides both a place to store the information and mechanisms to share that information with other network users. Administrators, instructors, and even students and guests can be connected using the campus network.
The school can provide services, such as registration, school directories, course schedules, access to research, and email accounts, and many others. Remember, network services are generally provided by servers. The school can provide network users with access to the internet, via an internet gateway.
Computing resources. The base of a wireless network is the access point. The access point sends out signals using radio frequencies that computers can detect and join.
All wireless devices also have a LAN adapter built in that sends out and receives data through the radio signals sent by the access point.
Network switch[ edit ] A network switch is a multi-port device that connects multiple computers together to create a network.
It can be used for sharing data between computers and can also act as a network bridge. The switch filters out network packets from each connected device and forwards them the their destination on the network, unlike a less advanced network hub, a network switch only forwards the data to one or more devices that specifically need the data rather than broadcasting the data to all of its ports.
Other names for a network switch are switching hub, bridging hub, or Mac Bridge. Ethernet Hub[ edit ] A Ethernet Hub multi-port repeater is a small rectangular electronic network hardware device that connects many computers and other network devices to form a single central switching point. Once connected through the hub, all computers and network devices communicate with each other.
The number of ports that an Ethernet hub varies from four and five ports to eight and sixteen ports. Original Ethernet hubs only offered 10 Mbps speeds, newer hubs now offer Mbps support which usually offer both 10 Mbps and Mbps capabilities.
Modems[ edit ] The modem's purpose is to connect network points that are not specifically meant for network traffic by wire or wireless. They are mostly designed for telephone lines by a Digital Subscriber Line. Firewall[ edit ] The computing term "Firewall" came to existence during the 's.
This was around the time when the internet emerged as a new globally used technology.
A Firewall is a hardware or software network device that is responsible for controlling network access and security. Firewalls track all incoming and outgoing traffic and block or allow traffic based on preset perimeters.
With the increase prevalence of cyber attacks, firewalls are essential for any network to remain secure. There are many different types of firewalls used to fulfill different purposes. These include but are not limited to: Network Layer or Packet Fillers This firewall works on the smallest level. Everything that communicates between the network and the computer releases packets of information.
This type of firewall filters through all these packets by terms set by either the system or the user. Proxies Proxy servers serve as almost a gateway between networks, and can pass and filter packets between them. Network invaders may use public systems as proxies to perform an action known as IP Spoofing. Application Layer These firewalls work on the application level, and filter out packets coming and going from a specific application.
Cables[ edit ] A wired network must contain some type of medium to transfer data over. Fast Ethernet To allow for an increased speed of transmission, the Ethernet protocol has developed a new standard that supports Mbps. This is commonly called Fast Ethernet. Fast Ethernet requires the use of different, more expensive network hubs and network interface cards. The access method used involves token-passing. In Token Ring, the computers are connected so that the signal travels around the network from one computer to another in a logical ring.
A single electronic token moves around the ring from one computer to the next. If a computer does not have information to transmit, it simply passes the token on to the next workstation. If a computer wishes to transmit and receives an empty token, it attaches data to the token. The token then Come and Join us for more www.
At this point, the data is captured by the receiving computer. The Token Ring protocol requires a star-wired ring using twisted pair or fiber optic cable. It can operate at transmission speeds of 4 Mbps or 16 Mbps. Due to the increasing popularity of Ethernet, the use of Token Ring in school environments has decreased. The IP addressing scheme is integral to the process of routing IP data gram through an internet work.
Each IP address has specific components and follows a basic format.