Chapter 4

Question 1

What is a router ?

Answer 1

A device that enables data to be sent between different types of networks. Used to connect a LAN to the internet, can be connected through cables or wirelessly.

Question 2

Uses of router ?

Answer 2

connecting networks and devices to the internet,
storing computer addresses,
routing data packets.

Question 3

What is NIC

Answer 3

NIC is needed to allow a device to connect to a network. Turns binary data into electrical signal that allows network access. Usually integrated into the motherboard.
Each NIC is given a unique hardwired media access control (MAC) address.

Media access control (MAC) address: a number which uniquely identifies a device when connected to a network.

First 6 hex digits identify the manufacturer’s code and the next 6 identify the device’s serial number.

Question 4

What are hubs ?

Answer 4

Hubs: they are hardware devices that can have a number of other devices connected to them. They are used to connect devices together to form a local area network (LAN). It takes a data packet received by one of its ports and sends it all relevant or irrelevant device connected to it.
Not very secure, broadcast data to all devices.
Unnecessary network traffic.