Download to read offline
![RJ-45
• The RJ-45 [ Registered Jack-45 ] connector is commonly used for computer
network cables .
• RJ45 connectors are twisted-pair connectors with eight positions and eight
contacts (8P8C).
• RJ45 connectors can be wired using two different schemes, T-568 A or B.](https://image.slidesharecdn.com/computersciencepresentation-250306131049-28a41b17/85/Class-8-Computer-Science-Presentation-pptx-4-320.jpg)
![ETHERNET
• An Ethernet card is sometimes known as Network Interface Card [ NIC ] .
• It is used to transmit data from the network to your computer by using a
network cable .
• The cable connection on the Ethernet card is called RJ-45 connection .](https://image.slidesharecdn.com/computersciencepresentation-250306131049-28a41b17/85/Class-8-Computer-Science-Presentation-pptx-6-320.jpg)
![BRIDGE
• A bridge is a device that is used to link two same networks .
• It reduces the amount of traffic on LAN [ Local Area Network ] as it does
not send all the data packs .
• It can be programmed to reject packets from particular networks .](https://image.slidesharecdn.com/computersciencepresentation-250306131049-28a41b17/85/Class-8-Computer-Science-Presentation-pptx-10-320.jpg)
![QUESTION TIME
1. Some of the devices that are required to connect computers . [ANY 4]
2. Modem is derived from the term ______________ .
3. Ethernet is a __________ technology.
4. A _____ is the most basic networking device that connects multiple
computers or other networking devices together .
5. A _________ is a device that is used to link two same networks .](https://image.slidesharecdn.com/computersciencepresentation-250306131049-28a41b17/85/Class-8-Computer-Science-Presentation-pptx-15-320.jpg)
![ANSWERS
1. Modem RJ-45 , Ethernet , Hub , Switch , Repair , Bridge , Router and
Gateway . [ANY 4 ]
2. Modem is derived from the term modulator-demodulator .
3. Ethernet is a networking technology.
4. A hub is the most basic networking device that connects multiple computers
or other networking devices together .
5. A bridge is a device that is used to link two same networks .](https://image.slidesharecdn.com/computersciencepresentation-250306131049-28a41b17/85/Class-8-Computer-Science-Presentation-pptx-16-320.jpg)
Class 8 Computer Science Presentation.pptx
- 2. NETWORK DEVICES • Someof the devices that are required to connect computers or peripherals in a network are : • Modem RJ-45 , Ethernet , Hub , Switch , Repair , Bridge , Router and Gateway .
- 3. MODEM • Modem isderived from the term modulator-demodulator . • It converts digital signals from the computer to analog from that can be transmitted over telephone wires and vice versa . • A modem is a device connecting your home to your internet service provider (ISP) through a physical connection.
- 4. RJ-45 • The RJ-45[ Registered Jack-45 ] connector is commonly used for computer network cables . • RJ45 connectors are twisted-pair connectors with eight positions and eight contacts (8P8C). • RJ45 connectors can be wired using two different schemes, T-568 A or B.
- 5. ETHERNET NETWORK INTERFACE CARD •Ethernet is a networking technology. • It is used in LAN and MAN networks . Ethernet cards are the essential parts of a network . • They are used to connect a computer to another computer or to a server by using a cable . • The computers on Ethernet are equipped with a special card called Ethernet card .
- 6. ETHERNET • An Ethernetcard is sometimes known as Network Interface Card [ NIC ] . • It is used to transmit data from the network to your computer by using a network cable . • The cable connection on the Ethernet card is called RJ-45 connection .
- 7. HUB • A hubis the most basic networking device that connects multiple computers or other networking devices together . • It is a single point of connection for all devices . It is available with 8 , 12 or 24 ports . • It connects segments of a LAN . The NIC tranfers data from a computer to a hub , which then tranfers it to other connected computers .
- 8. SWITCH • A switchin a network tranfers data to a specific computer .
- 9. REPEATER • A repeateris a device that regenerates the incoming signal . Then it places the same on the communication channel again . • It is used to increase the length of the network . • Since it amplifies the signal, it requires a source of electric power.
- 10. BRIDGE • A bridgeis a device that is used to link two same networks . • It reduces the amount of traffic on LAN [ Local Area Network ] as it does not send all the data packs . • It can be programmed to reject packets from particular networks .
- 11. ROUTER • A routeris used to forward (route) data packets to other networks when the destination address is outside its network .This process is known as routing . • It supports different WAN technologies . The most common example is a home router that is used to share broadband Internet connection .
- 12. GATEWAY • A gatewayis used to connect two networks of different types . It acts as an entrance to another network . • It can translate information into a format that is understood by the computer . • It can be implemented as software or as hardware or as a combination of both .
- 13. TECH FACT • Datapackets consist of data , which travel across a network. A packet is also referred to as a datagram , segment , block , cell or frame , depending on the protocol . • A protocol is a set of rules that govern how data is transmitted and received in a computer network . TCP = Transmission Control Protocol HTTP = HyperText Transfer Protocol
- 14. TECH FACT FTP =File Transfer Protocol SMTP = Simple Mail Transfer Protocol
- 15. QUESTION TIME 1. Someof the devices that are required to connect computers . [ANY 4] 2. Modem is derived from the term ______________ . 3. Ethernet is a __________ technology. 4. A _____ is the most basic networking device that connects multiple computers or other networking devices together . 5. A _________ is a device that is used to link two same networks .
- 16. ANSWERS 1. Modem RJ-45, Ethernet , Hub , Switch , Repair , Bridge , Router and Gateway . [ANY 4 ] 2. Modem is derived from the term modulator-demodulator . 3. Ethernet is a networking technology. 4. A hub is the most basic networking device that connects multiple computers or other networking devices together . 5. A bridge is a device that is used to link two same networks .
- 17.