Transcript What is a computer network?

Unit 1
Networks Workbook
What is a computer network?
What is a
computer
network?
Create a list of the
activities computer
networks make
possible.
Activities
Types of Network
Identify the network type from the description.
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
Bus Topology
Describe
the bus
topology
Advantages:
Bus topology diagram
Disadvantages:
Ring Topology
Describe
the bus
topology
Advantages:
Ring topology diagram
Disadvantages:
Star Topology
Describe
the bus
topology
Advantages:
Star topology diagram
Disadvantages:
Mesh Topology
Describe
the bus
topology
Advantages:
Mesh topology diagram
Disadvantages:
Network Media
Use internet research to complete the table below:
Type
Copper
Cable
Fibre Optic
Cable
Wireless
Range
Transmission Speed
Security (Good,
Medium, Poor)
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
Calculate the transmission times for the following scenarios:
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
Transmission Time
Calculate the transmission times for the following scenarios:
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
Error Detection
Identify the keyword from the description.
Keyword
Description
A 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.
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
1011010
0110111
1100000
0101111
Even parity
Odd parity
Network Addressing
What is a MAC
address?
What is a
hostname?
Give an
example of a
MAC address