Internet Layer

Question 1

IP Address

Answer 1

32 bit binary nuber used to uniquely identify your computer

Question 2

Subnet Mask

Answer 2

A 32-bit number that splits your IP address into network ID and host ID. It is made of contiguous
1’s on the left-hand side of the number, and the rest of the number is 0’s. Where the 1’s stop and the 0’s begin on a subnet mask is where the IP address is
divided into the network ID and Host ID.

Question 3

How many IP addreses are there?

Answer 3

2^32 IP addresses

Question 4

Communication can occur directly if…

Answer 4

-Network ID is the same.
- Host ID is different.
- A physical (or wireless) connection exists between the devices

Question 5

Router

Answer 5

A router is a device that can communicate between multiple networks, helps computers communicates devices on another network.

Question 6

Default Gateway

Answer 6

The IP address of the router the device connects to

Question 7

To connect to the internet you need..

Answer 7

• IP address
• A subnet Mask
• A default gateway

Question 8

Routing Tables

Answer 8

Information about how routers get to other networks they are connected to are stored in routing tables

Question 9

Problems with IP address allocation

Answer 9

Class A and Class B networks were allocated and Class C networks were running out. Also routing tables were very big to keep track of the 2 million Class C networks.