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Internet
GATEWAY
A B C D E
Figure 6.24 Switch as Gateway
GATEWAY
A E F J
B C D G H I
Figure 6.25 Router as Gateway
1. Which network (LAN / MAN/PAN/WAN) covers the geographical area of a university campus?
2. Which is the largest WAN existing on Earth?
3. Name the device that connects two networks with different protocols.
4. Can a router be replaced with a bridge?
5. Which network device is used to connect computers to the local area networks?
Let's Summarise
Transfer of data between computers (also called nodes or terminals) via some channel is called data
Ø
communication.
Chat provides real-time communication between two or more users. It allows the connected users to
Ø
exchange messages in a chat window. Examples of chat applications include WhatsApp, Facebook messenger,
and Telegram.
236 Touchpad Informatics Practices-XII

