Chapter 1.docx

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Department
Information Studies
Course
IST 233
Professor
David Molta
Semester
Spring

Description
Chapter 1 • AlohaSmart: credit card has both a computer chip and a traditional magnetic stripe. • Smart cards: cards with computer chips o Marketing campaign: advantages in terms of security and extra services o Slightly higher fee than traditional magnetic stripe cards, slightly higher fee than traditional magnetic stripe cards, bank will benefit • BlueSync server: saved the file to the cloud • BlueSync: cloud data and synchronization service provider • Cloud: imagery signifies that users do not have to know what is happening “inside the cloud”. • Cloud software service provider: software is provided as a service when needed, not on a product to be purchased once and stored on the user’s machine like traditional software • • Wireless sniffer: radar map which shows the relative directions of nearby access points and their signal strengths • Service set ID (SSID): name of the network • BSSID: address of the specific access point • RSSI: value which is the relative signal strength indicator, which shows strength in terms of decibel relative to one milliwatt • Rogue access point: a n unauthorized access point • BYOD: bring your own device, the phenomenon of employees bringing their own devices to work and using it for work purposes • • Network: system that permits applications on different hosts to work together • Network core: depicted as a cloud to emphasize that users do not have to know what goes on inside the network core • Host: any device attached to a network. Includes large servers, small desktops, laptops, netbooks, smartphones and tablets. • Networked applications: applications that require networks to work • File transfer protocol: moving large files • Web 2,0: users provide the content • Social media applications: designed to facilitate relationships • Hosts and addresses: applications run on devices called hosts, we use the term host rather than computer because not all devices connected to networks are computers in the traditional sense • Network address: when a source host sends a message to a destination host, the source host places the address of the destination host in the message. The network delivers the message to the destination host. • Network core: central part of the network • Access links: A transmission line that connects a station to a switch, in telephony, the line used by the customer to reach the PSTN’s central transport core • Client/server processing: the form of client/server computing in which the work is done by programs on two machines, a server program on a server host provides services to a client program on a client host • Server Host: in client/server processing, a server program on a server host provides services to a client program on a client host • Request response cycle: A cycle used in client/server processing where a client sends a request message to the server sends back a response message • Response message: in challenge-response authentication protocols, the message that the applications returns to the verifier • Peer to peer processing: client hosts provided services directly to other client hosts • Bits per seconds (bps): network speeds measured. • Bytes per second (Bps) • Kilobits per second (kbps), megabits per second (Mbps), gigabits per second (Gbps), terabits per second (Tbps) • Base units: in the metric system, the basic unit being measured: bits per second, hertz, meters, and so forth • Advanced Research Projects Agency (ARPA): US Department of Defense, an agency within the US defense that funded the creation of ARPANET and the Internet • Bursty: there are bursts of traffic separated by long sciences. Very wasteful if you’re using reserved-capacity circuits • Packet: a message at the internet layer • Packet switching: the source host fragments the application message into many smaller pieces (packets), the network delivers the packets to the destination host, which reassembles the application message, saves money back multiplexing multiple conversations over expensive circuits • Multiplexing: having the packets of many conversations share trunk lines; reduces trunk line cost, the ability of a protocol to carry messages from multiple next-higher-layer protocols in a single communication session • Multiplexes: mixes together, typically to reduce cost through economies of scale • Switching decision: It must decide where to send the packet next • Individual packet switches: do not know the packet’s entire path through the network. • Physical links: A connection linking adjacent devices on a network • Data link: The path that a frame takes
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