Unit 1Networks Workbook

What is a computer network?

What is a computer network?

ActivitiesCreate a list of the activities computer

networks make possible.

Types of Network

Type of Network Description Example

Connect computers over a large area such as a town, city or country.

The internet (a global computer network)

Connect computers over a building or a site. School network

Connect computers or devices used by one person.

Bluetooth headset connected to a mobile phone

Identify the network type from the description.

Bus Topology

Bus topology diagram

Advantages:

Disadvantages:

Describe the bus topology

Ring Topology

Ring topology diagram

Advantages:

Disadvantages:

Describe the bus topology

Star Topology

Star topology diagram

Advantages:

Disadvantages:

Describe the bus topology

Mesh Topology

Mesh topology diagram

Advantages:

Disadvantages:

Describe the bus topology

Network Media

Type RangeTransmission Speed

Security (Good, Medium, Poor)

Copper Cable

Fibre Optic Cable

Wireless

Use internet research to complete the table below:

Transmission Speed

Data transmission speeds are measured in:Data storage is measured in:The formula used to calculate how long it will take to transfer a file:

Transmission Time

Scenario Answer (including working)

File Size: 2 KB Speed: 5 Mbps

File Size: 3 KB Speed: 1 Mbps

File Size: 10 KB Speed: 2 Mbps

Calculate the transmission times for the following scenarios:

Transmission Time

Scenario Answer (including working)

File Size: 1 KB Speed: 10 Mbps

File Size: 1 MB Speed: 4 Mbps

File Size: 8 KB Speed: 1 Gbps

Calculate the transmission times for the following scenarios:

Error Detection

Keyword DescriptionA checksum is an algorithm used to check for errors in data transmission. It works by calculating a numerical value based on the number of bits in a packed of data. This value is attached to the packet.

When the packet reaches its destination, the same checksum algorithm is applied to the data. If the two checksums don’t match it shows that an error has occurred and the receiving computer asks the sending computer to re-send that package.

Identify the keyword from the description.

Parity Checking

What is parity checking?

What is even parity?

What is odd parity

Parity Checking

Add an even and an odd parity bit to each of these numbers.

Data being transmitted Even parity Odd parity

1011010

0110111

1100000

0101111

Network Addressing

What is a MAC address?

What is a hostname?

Give an example of a MAC address