Flashcards
CHAPTER 4- NETWORKS
Cards in this deck (10)
- 1WHAT IS A NETWORK?A network is two or more computers or other electronic devices, connected together so that they can exchange data.
- 2WHAT DO NETWORKS ENABLE US TO DO?- Share files
- send emails to each other
- share resources like printers or scanners - 3WHY NOT USE NETWORKS?- The computer is vulnerable to hackers
- If the network breaks, many tasks become very difficult
- Your computer can more easily be attacked by virus. - 4LOCAL AREA NETWORK (LAN)- Is a network confined to one building or site.
- Often a private network that belongs to business or organizations. Because LAN's are geographically small so they need to use cables for connections. - 5WIRELESS LOCAL AREA NETWORK (WLAN)- A wireless LAN is a LAN that uses radio signals (wi-fi) to connect computers instead of cables.
- Routers or wireless switches are used to send and receive data around the network. - 6WIDE AREA NETWORK (WAN)- A Wide Area Network is a network that extends over a large area.
- A WAN is often created by joining several LANs together.
- For example, when a business has offices in different countries, they link the office LANs together. - 7WHAT IS A ROUTER?- A router is a device that allows computers to send data packets from one computer to another.
1. Routers read data and decide where to send it.
2. They decide on the fastest route in which to send the data.
3. They then make the format of the data suitable for the network that it is being sent to.
The router uses the IP address to route the message to an appropriate switch. The switch will then use the MAC address to locate the device on the network. - 8WHAT IS THE DIFFERENCE BETWEEN IP ADDRESS AND MAC ADDRESS?- The IP gives the location of each device connected to the internet.
- The MAC address identifies the device connected to the internet. - 9WHAT IS A NETWORK INTERFACE CARD?- A NIC is needed to allow the network device to connect to a network. It contains the MAC address.
- Without a NIC the device would not be able to communicate with each other on a network - 10WHAT IS A HUB?A hub allows you to connect together a limited number of devices to create a small Local Area Network.
- Hubs work by receiving data packets from one of it's ports and transmits the data pocket to every computer on the network.
- This means that hubs are not very secure and can cause data collision resulting in too much information being sent and received at the same time making it inefficient.
Information
- Description
- Flashcards on CHAPTER 4- NETWORKS, created by Aditi Anil on 19/03/2018.
- Created by
- Aditi Anil
- Views
- 0
- Rating