acomputer network or data network, a telecommunications network, exchange data, computer networks, networked computing devices (network nodes), pass data, data connections. network links between nodes, cable media or wireless media, Internet, network devices, originate, route and terminate the data, hosts such as servers and personal computers, as well as networking hardware, to exchange information with another device, support applications, access to the World Wide Web, shared use of application and storage servers, printers, fax machines, use of email and instant messaging applications, to transmit signals, the communications protocols, to organize network traffic, the network's size, topology and organizational intent, wired technologies, from slowest to fastest transmission speed, twisted pair wire, medium for all telecommunication, reduce crosstalk and electromagnetic induction,range from 2 million bits per second to 10 billion bits per second, coaxial cable, cable television systems, office buildings, and other work-sites for local area networks, ITU-TG.hn technology,home wiring (coaxial cable, phone lines and power lines), to create a high-speed (up to 1 Gigabit/s) local area network, an optical fiber,a glass fiber, pulses of light to transmit data, advantages of optical fibers over metal wires are less transmission loss, immunity from electromagnetic radiation, and very fast transmission speeds of up to trillions of bits per second, the number of messages sent over a fiber optic cable, wireless technology, terrestrial microwave, Earth-based transmitters and receivers, resembling satellite dishes, terrestrial microwaves are in the low-gigahertz range, limits all communications to line-of-sight,relay stations, spaced approximately 48 km (30 mi) apart, communications satellites, via microwave radio waves, stationed in space, in geosynchronous orbit 35,400 km (22,000 mi) above the equator, Earth-orbiting systems, receive and relay voice, data, and TV signals, cellular and PCS systems, radio communications technologies, the region covered into multiple geographic areas, a low-power transmitter or radio relay antenna device, to relay calls from one area to the next area, radio and spread spectrum technologies,wireless local area networks, a high-frequency radio technology, digital cellular and a low-frequency radio technology, spread spectrum technology, multiple devices in a limited area,free-space optical communication, visible or invisible light for communications,line-of-sight propagation, limitingof the physical positioning of communicating devices, exotic technologies, transportdata over exotic media, IP over Avian Carriers,RFC 1149, interplanetary dimensions via radio waves, a large round-trip delay time, slow two-way communication, send large amounts of information, acommunications protocol, a set of rules for exchanging information over network links, a protocol stack, each protocol leverages the services of the protocol below it, the wireless router and the home user's personal computer,surfing the web, communication protocols,various characteristics,connection-oriented or connectionless, circuit mode or packet switching, hierarchical addressing or flat addressing, network security,network administrator,unauthorized access, misuse, modification, or denial of the computer network and its network-accessible resources,network administrator, users are assigned an ID and password, access to information and programs within their authority, a variety of computer networks, both public and private, to secure daily transactions and communications among businesses, government agencies and individuals, network resilience, share printers and some servers from a workgroup, to keep the network up and running, acommunity of interest, a set of arbitrarily located users, share a set of servers, communicate via peer-to-peer technologies, physical and logical perspectives,involve geographic locations, physical cabling, and the network elements (e.g., routers, bridges and application layer gateways),interconnect the physical media, logical networks, the TCP/IP architecture, subnets, map onto one or more physical media, a campus of buildings, a set of LAN cables, a common subnet, using virtual LAN (VLAN) technology, the trust and scope characteristics of a network, TCP/IP architectural terminology, an intranet, under private administration, an enterprise, authorized users (e.g. employees),intranet, Internet, extranet, users, enterprises, and content providers interconnected by Internet Service Providers (ISP), engineering viewpoint, the Internet is the set of subnets, and aggregates of subnets, which share the registered IP address space and exchange information about the reachability of those IP addresses using the Border Gateway Protocol,human-readable names of servers are translated to IP addresses, transparently to users, via the directory function of the Domain Name System (DNS), business-to-business (B2B), business-to-consumer (B2C) and consumer-to-consumer (C2C) communications, secure Virtual Private Network (VPN) technology
|
|
|
Exercise 3. What do you know about these notions?
