Transcript Evidencing P1 and P2

BTEC IT Unit 09 - Lesson 05
Evidencing P1 / P2
Mr C Johnston
ICT Teacher
www.computechedu.co.uk
Session Objectives
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Understand the requirements of assessment tasks P1 and P2
for this unit,
Understand what evidence is required to meet P1 and P2.
P1 Requirements
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P1 requires you to describe the different types of network
available and the technologies, standards and protocols which
support each,
You will need to focus on the three types of network: WAN,
LAN and PAN.
These are the supporting technologies / standards / protocols
which could be utilised by each type of network:
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Technologies e.g. frame relay, MPLS, ATM; logical and physical
topologies e.g. star, bus, ring, mesh, tree; network access methods eg
Ethernet, CSMA, Token passing; network models e.g. OSI 7 layer,
TCP/IP
Network protocols and standards: types e.g. TCP/IP, AppleTalk,
UDP, 802.2, 802.3, FDDI, 802.5; wireless technologies e.g. 802.11,
infrared, Bluetooth, 3G; factors affecting range and speed of wireless
technologies
P2 Requirements
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P2 requires you to describe why different network standards
are necessary,
This will normally be covered whilst completing work for P1
however its needs to be overt,
Ensuring these questions are answered during P1 will ensure
the content is properly covered:
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Why is TCP/IP used on this and any network instead of another
protocol suite?
The benefit of the WAN standard,
The benefit of the LAN standard,
What protocols are used on WAN?
What protocols are used on LAN?
Include within the description
benefits and limitations of the
network type
Evidence
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State why each different
technology, standard, protocol is
needed
Evidence for P1 / P2 will probably by a report. This essay
structure may help:
Types of Network and The Technologies, Standards and Protocols
Which Support Them
Title:
Para1: What Is A Computer Network
Para2: Types of Network and Supporting Techs, Stands, Protocols
Network Type
Description
Technologies & Standards Used
Protocols Used
WAN
LAN
PAN
Table or
paragraphs
WAN
Description
xxxxxxxxxxxxxxx
Technologies & Standards Used
xxxxxxxxxxxxxxx
Protocols Used
xxxxxxxxxxxxxxx
Para3: Notes on TCP/IP – Why used instead of IPX/SPX, AppleTalk
Para4: Notes of application layer protocols – why we need them / how used
Para5: Diagrams showing the use of different network types, technologies,
standards and protocols in real life.
P1 – Describe the types of network available and how they relate to
particular network standards and protocols
P2 – Describe why different network standards and protocols are
necessary
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Programming Constructs
For P1, describing networks, protocols and standards, learners could produce a
report using diagrams.
For P2, learners should be able to demonstrate they understand why different
network standards and protocols are necessary. Examples given should be realistic.
This can be linked to P1.
TCP / IP
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What is it
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Why – Its universal – No bridging required = less hassle
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Device independent
Platform independent
Why not AppleTalk
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Suite of protocols which allow communication and data transfer between devices to take
place.
4 layers (application, transport. Internet, data link) - communication seems to takes
place at the same layer of each machine e.g. application layer on one machine talks to
application layer on other
Developed by Apple only for apple = device dependant & platform dependant
May get around it with bridges but hassle
Why not IPX / SPX
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Used on Novel NetWare systems = platform dependant but device independent as Novell
provides clients for different devices – fine for LANs
Not used on internet as not all servers NetWare – can use bridges but adds complexity
Application Layer Protocols
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Describe what each of these protocols is for and how they are used
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HTTP / HTTPs
FTP / TFTP
SMTP / IMAP / POP3
NTP
TELNET
RDP
DNS
DHCP
SNMP
ICMP (actually internet layer but allows user to instigate a PING or a TRACERT)