C3 Data communication
The concepts, processes and implications of data transmission in and between
computer systems.
•
The concept of layers to describe how data is transferred, and how applications
communicate, over a network.
•
The role of data packets in transmitting data over a network:
o
contents and structure of a data packet
o
the purpose and function of each component of the data packet
o
the concept of packet switching.
•
IP and MAC addresses and their purpose.
•
The purpose and function of common network protocols, e.g. HTTP/HTTPS,
FTP, IMAP, TCP/IP.
•
Methods of connecting devices and transmitting data across and between
computer systems, e.g. Ethernet, Wi-Fi, Bluetooth.
C4 Network design
How to design a computer network to meet identified needs.
•
Planning a network to meet the identified organisational and business goals,
and technical requirements that need to be met, including:
o
data sharing
o
resource sharing
o
communication
o
creation of larger systems
o
operational goals, e.g. productivity improvements, diversification,
development of new or improved products.
•
Network size, small office/home office (SOHO), small and medium-sized
business (SMB), large enterprise.
•
Design aims and requirements for network (LAN/WAN) and how these can be
met, including:
o
scalability
o
availability
o
redundancy
o
performance, e.g. latency, bandwidth, large traffic volumes, distance
o
security, e.g. malware, unauthorized access, loss/theft of device.
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•
Benefits and drawbacks of implementing infrastructure using an on-site,
cloud- based or hybrid models, including consideration of:
o
Network as a Service (NaaS)
o
Platform as a Service (PaaS)
o
Software as a Service (SaaS)
o
Data as a Service (DaaS)
•
Network physical design schemes, including:
o
flat design and hierarchical design, including related topologies
o
network diagrams and physical layout
o
LAN/WAN equipment requirements, e.g. server, switch, router
o
network client device requirements, e.g. type of device, technical specifications,
peripherals.
•
Logical network design, including:
o
IP addressing
o
IPV4 versus IPV6, private versus public IP
o
naming schemes
o
virtual LAN (VLAN) design issues.
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24:
T
ECHNICAL
F
UNDAMENTALS FOR
C
OMPUTING
P
ROFESSIONALS
Pearson BTEC International Level 3 Qualifications in Information Technology –
Specification – Issue 3 – September 2022 © Pearson Education Limited 2022
327
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