Unit introduction
Networks are used in one way or another by virtually every organisation, from simple use
of internet services through internal file sharing to wide area networks exchanging data
across continents. Therefore, it is essential that learners thinking of careers within the IT
i...
Unit 42: Computer Networks
Unit code: R/601/7320
QCF Level 3: BTEC Specialist
Credit value: 10
Guided learning hours: 60
Aim and purpose
The aim of this unit is to ensure learners understand the key components of networked
systems, know about network protocols and the services provided by network systems
and develop the skills required to ensure network security.
Unit introduction
Networks are used in one way or another by virtually every organisation, from simple use
of internet services through internal file sharing to wide area networks exchanging data
across continents. Therefore, it is essential that learners thinking of careers within the IT
industry have a good understanding of the underlying principles of networking and how
data travels around networks.
This unit starts by exploring the different types of networks and the standards relating to
network systems, including local and wide area networks. Networks can be either wired
or wireless systems and, although much of the underpinning content is similar, this unit
does make reference to both.
The hardware and software components used in networks and their operation are
explored and learners will develop an understanding of their functions and how they
relate to each other, particularly how connections are made and the purpose of these
connection devices.
As users of networks, we work with them mostly through the services that they provide,
from simple services such as file sharing and communications to more complex services
involving security and account management. Learners will explore and use the different
services available.
For networks to be suitable they must be secure and networks distributed across several
physical locations, perhaps via a WAN, makes the ensuring of security a complex
business. Learners will be exploring the technologies used to create secure systems and
putting security procedures and devices in place to secure a networked system. Learners
will come to understand the risks to businesses from insecure networks.
Learning outcomes and assessment criteria
In order to pass this unit, the evidence that the learner presents for assessment needs to
demonstrate that they can meet all the learning outcomes for the unit. The assessment
criteria determine the standard required to achieve the unit.
On completion of this unit a learner should:
Learning outcomes Assessment criteria
1 Know types of network 1.1 describe the types of networks available and how
systems and protocols they relate to particular network standards and
protocols
1.2 describe why different network standards and
protocols are necessary
2 Understand the key 2.1 explain the key components required for client
components used in workstations to connect to a network and access
networking network resources
2.2 explain the function of interconnection devices
3 Know the services provided 3.1 describe typical services provided by networks
by network system
4 Be able to make networked 4.1 make a networked system secure
systems secure
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