20667167
Beschreibung
Karteikarten von Adriana Vincelli-Joma, aktualisiert more than 1 year ago
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Erstellt von Adriana Vincelli-Joma
vor fast 5 Jahre
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| Frage | Antworten |
| Networks allow you to: | -send/receive email -browse web pages stored across globe -download audio/video files -talk to people over phone |
| Collaboration | -two or more people work together to achieve common goal -produces greater results than working alone -involves coordination and communication |
| Effectiveness of collaboration | -communication skills and culture -communication systems -content management -workflow control |
| Computer network | -collection of computers that communicate with one another over transmission media |
| LAN components | -switch -Network Interface Card (NIC) -Media Access Control (MAC) address -unshielded twisted pair (UTP) cable -optical fiber cable -IEEE 802.3 (Ethernet) Protocol |
| switch | -special-purpose computer that receives and transmits data across network |
| Network Interface Card (NIC) | -hardware that connects device's circuitry to network cable -works together with programs in each device to implement Layers 1 and 2 of TCP/IT - OSI hybrid protocol |
| Media Access Control (MAC) address | -permanent address given to each NIC at factory -enables device to access network via Level-2 protocol -no two NICs have same MAC address |
| Unshielded twisted pair (UTP) cable | -connect computers, printers, switches, and other devices -four pairs of twisted wire -RJ-45 connector used to connect UTP cables into NIC devices |
| Optical fiber cable | -connect computers, printers, switches, and other devices -signals are light rays reflected inside glass core -core surrounded by cladding to contain light signals -cladding wrapped with outer layer to protect it |
| IEEE 802.3 (Ethernet) Protocol | -Ethernet protocol standard -specifies how messages are to be packaged and processed for transmission over LAN -operates at Layers 1 and 2 of TCP/IP - OSI architecture |
| 10/100/1000 Ethernet | -transmission rate of 10, 100, or 1000 Mbps -communications speeds expressed in bits -memory sizes expressed in bytes |
| WAN components | -router -Internet Service Provider (ISP) -Hypertext transfer protocol (HTTP) -browser |
| router | -special purpose computer that moves network traffic from one node on network to another -implement protocol for WANs |
| Internet Service Provider (ISP) | -provides legitimate Internet address -serves as gateway to Internet -passes communications back and forth between user and Internet -pay for Internet -collect money from customers and pay access fees and other charges on users' behalf |
| -Hypertext transfer protocol (HTTP) | -Layer-5 protocol used to process webpages |
| browser | -program that processes HTTP protocol -receives, displays, and processes HTML documents -transmits responses |
| Alternatives for WAN | -point-to-point lines -PSDN -virtual private network |
| Point-to-point lines | -span geographically distributed sites -use lines provided by licensed communications vendors -expensive to set up and manage |
| Public-switched data network (PSDN) | -lease time on public switched data network operated by independent party -ineffective for inter-company communication |
| Virtual private network (VPN) | -secure private connection provides tunnel through internet -can support inter-company communication -secure, encrypted communications |
| Firewall | -computing device that prevents unauthorized network access -located between firm's internal and external network -may be special-purpose computer/program or program on general-purpose computer/router |
| Search engine | -tool used to search for info on Internet |
| Web Search Engine Requirments | -way to collect URLS -method for storing/accessing URLs so they are searcheable |
| Web crawlers | -software program that browses web in methodical way -finds URLs |
| Search engine indexing | -organizes info. retrieved by crawlers |
| 3-tier architecture of web applications | -user tier -server tier -database tier |
| Network Layers | -Layer 1 (Network Access Layer) -Layer 2 (Internet Layer) -Layer 3 (Transport Layer) -Layer 4 (Application Layer) |
| Layer 1 (Network Access Layer) | -transmit data within single network |
| Layer 2 (Internet Layer) and Layer 3 (Transport Layer) | -data transmission across an internet |
| Layer 4 (Application Layer) | -protocols that help different applications interact with each other and person using computer |
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