IGCSE ICT Networks and communication

What is a network?

• A computer connected to a network

• Two or more computers or electronic devices connected to each other to exchange data

• A computer that is not connected to a network

• A device for connecting to the Internet

What does a modem do?

• Converts digital signals into analog signals for transmission over an existing telephone line

• Connects a number of computers together to form a LAN

• Converts analog signals into digital signals for the computer

• Connects different LANs together

What is the main difference between a hub and a switch?

• What is the main difference between a hub and a switch?

• The switch sends data only to specific computers, while the hub sends data to all computers on the network

• The hub is faster than the switch

• The switch is less secure than the hub

What is the purpose of a bridge?

• To connect a computer to a modem

• To connect different LANs together

• To connect a computer to the Internet

• To connect a computer to a printer

What is the main function of a router?

• Converts digital signals into analog signals

• Sends data only to specific computers on the network

• Connects a number of computers together to form a LAN

• Reads address information to determine the final destination of packets

What do data packets contain?

• Only the IP address of the recipient

• Only the IP address of the sender

• Only the packet identification number

• The IP address of the sender and recipient, along with other information

What is the main difference between network cables and wireless networks?

• Network cables are less secure than wireless networks

• Network cables transfer data more slowly than wireless networks

• Network cables do not require any configuration

• Network cables offer faster data transfer speeds and greater security than wireless networks

What is a gateway?

• A device that connects a computer to the Internet

• A device that connects a computer to a printer

• A network point that serves as an entry for another network

• A device that connects two different LANs together

What is the role of a Network Interface Card (NIC)?

• Allows a device to connect to a modem

• Allows a device to connect to a network

• Allows a device to connect to a printer

• Allows a device to connect to a television

What does a switch do when it receives a message?

• Sends the message only to the closest computers

• Checks which computer the message is addressed to and sends it only to that computer (or those computers)

• Sends the message to all computers on the network

• Ignore the message