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40 Cards in this Set
- Front
- Back
- 3rd side (hint)
Definition of computer networks and Communication. |
1. Computer network is a system of interconnected computers and peripheral devices. 2. Peripheral devices: printers, scanners and cameras. 3. Function: exchange & share information and resources a network. 4. Medium: wire or wireless. 5. Hardware & software used to able interconnected in a network. |
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Definition of communication |
Is about the transfer of information from a sender, across a distance, to a receiver. |
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The important of computer networks and Communication |
1. E-business 2. Online Education 3. E-Banking 4. Long Distance Communication. |
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E-Business |
~ business transaction ~ buying & selling ~ servicing customer ~ collaborating with business partners |
Activities |
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Online education |
~ student at any location around the world can participate in an online classroom. ~download tutorial questions and submit the assignment |
Activities |
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E-banking |
~ account management, fund transfer, payment over internet. ~ transaction can be done anywhere and anytime. (Save time because no traversing & queuing at counter) |
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Long distance communication |
~Communication is possible via voice, text on video. ~Is cheaper than making normal phone call. ~ is faster and more effective than letters of fax. |
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Types of computer networks |
1. Local Area Network (LAN) 2. Metropolitan Area Network (MAN) 3. Wide Area Network (WAN) |
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Local area network |
1. Covers a small region of space , typically a single building. 2 Example: school lab |
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Metropolitan area network |
~A collection of LANs with the same geographical area, for instance a City. ~ Example: Kuala Lumpur |
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Wide area network |
A collection of LANs and or MANs or the mix of two with a very large geographical area, for instance a country or beyond the border. Example: between KL and London. |
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Defferentiate between the three types of computer network |
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Types of network architecture |
1. Client/ server 2. Peer-to-peer |
2 types |
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Differentiate of client/ server and peer-to-peer network |
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Types of network topology |
Bus topology Ring topology Star topology |
3 types of network topology, |
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Bus topology |
~ consists of a single central cable (backbone) which all nodes (computer and peripheral devices) connected. ~ If one of the nodes fails, the bus network would still function as long as the backbone is working. |
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Ring topology |
~ all nodes connected in a loop. ~ each node directly connected to 2 neighborhood nodes. ~ one of the nodes fails, the entire network would down. |
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Star topology |
~ consists of a center host and all nodes connected to the host. ~ host: hub, switch, modem router, server. ~ the host will control the flow of communication in the network. ~ if one of the nodes fails, the network can still function as long as the host is working. |
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Differentiate between three types of network topology |
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Network Protocol |
1. Transmission Control Protocol/ Internet Protocol (TCP/IP) 2. Hypertext Transfer Protocol (http) 3. Files Transfer Protocol (FTP) 4. Simple Mail Transfer Protocol (SMTP) |
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Transmission Control Protocol/ Internet Protocol (TCP/IP) |
~ is a internet communication protocol ~ is a standard that sets the rules for communication on network. ~TCP establishes connection between two computers, protects against data loss and data corruption. ~ IP takes care of delivering data packets between two computers |
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Hypertext Transfer Protocol (http) |
Display web page written using HTML languange (tag) |
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Files Transfer Protocol (FTP) |
Transfer files directly to the server. |
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Simple Mail Transfer Protocol (SMTP) |
– This protocol is used for transferring e-mail between computers. |
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Network Communication Technology |
1. Intranet 2. Extranet 3. Internet |
3 types |
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What is Intranet? |
~ is an internal network that uses internet that exists within an organisation. ~ is a private network. ~ share an organisation's information or operation with its employee only. ~ Example: telephone directory, events calendars & job postings. |
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What is Extranet? |
~ a private network. ~ share parts of the business's information or operations with partners, suppliers, vendors, customers or others business. ~ given ID and Password to access company server. |
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What is internet? |
~ is a public network ~ interconnected millions of conputer network that transmit data by packet switching using internet protocol (IP). ~ carry internet services like: electronic mail, online chat, World Wide Web (WWW). |
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Devices needed in computer network communication |
1. A network card or PC card a) NIC ~ Network Interface Card. b) WNIC~ wireless NIC 2. MODEM (internal & external) 3. Hub, switch, router 4. Wireless Access Point (WAP). |
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Network card |
A network card or PC card that enable computer to access the network. a) NIC ~ Network Interface Card. (Conner to cable) b) WNIC~ wireless NIC |
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MODEM (internal & external) |
~ enables computer to transmit data over telephone or cable. ~Convert analog signal to digital signal, vice versa. |
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Hub, switch, router |
1. To connect segment of a LAN. (Hub & switch) 2. To connect multiple computer or network( router) |
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Wireless Access Point (WAP). |
~ a device that allow computers to transfer data wireless. (mobile device) |
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Types of network communications channels (Medium) |
1. twisted-pair cable 2. coaxial cable 3. fiber-optic cable 4. satelite systems 5. wireless systems ~radiowaves, microwaves and infrared. |
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Twisted-Pair Cable |
1. 2 wires twisted together. 2. Wrapped with plastic outer jacket 3. Connector: RJ45 4. UTP~Unshielded Twisted-Pair Cable. 5. STP~Shielded Twisted -Pair Cable. |
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Coaxial Cable |
1. Single copper cable surrounded by at least 3 layer. 2. Cable television |
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Fiber-optic cable |
1. Using light for data transmission. 2. Consists of hundred of thin strand of glass or plastic. |
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Comparison of 3 types of wireless transmission media |
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Network Operating System (NOS) |
~ NOS has additional functionality that allows it to connect computer and paripherals to a network. ~ most frequenly used with LAN & WAN. ~Example: Windows NT, Windows 2000 Server, Windows Server 2003, Red Hat Linux. |
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Client Software |
1. Web Browser ( Internet Explorer, Safari, Netscape, Firefox, Opera) 2. Email Client 3. File Transfer Protocol (FTP) Client. |
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