These booklets contain all notes required to achieve an A* in the Information Systems module, all notes have been extracted directly from CCEA's mark schemes.
Booklet 1 - Networks
Booklet 2 - Databases
Booklet 3 - Application Of Digital Technology
,LAN:
A LAN is spread over a small geographical area, such as a building or an office. A switch
or hub is used to connect the devices to the network. Devices on the network can
connect wirelessly or by cable. This allows a range of devices to be on a LAN at the
same time, for example tablets, PCs and laptops could all connect to the same network.
WAN:
A WAN covers a large geographical area using the public telephone
system/communication satellites undersea cables, a WAN provides services globally.
MAN:
A MAN covers a highly populated area using fibre optic/wireless technology a MAN
provides services for the community.
, Network Card:
It connects a computer to a LAN so that it can communicate with the file
Server. It provides a port for connecting a network cable/Ethernet cable.
Server:
Manages shared network resources such as data/files/peripherals. A server processes
requests from other nodes.
Switched Hub:
Acts as a connection point for several network computers/nodes
Checks the destination/IP address of data packets and forwards them to the intended
recipient using the optimum route.
Repeater:
Regenerates data transmission signals that have been attenuated.
Wireless Access Point (WAP):
To connect wireless devices to a wired network using Wi-Fi or Bluetooth
Media converter:
Allows two dissimilar media types … to connect together/ Changes the physical signals…
from one media type to another … such as fibre optic cable and copper
MAC Address:
Identifies a computer’s network interface card (NIC) uniquely on a
LAN
IP Address:
An IP address is a unique number assigned to each computer connected
to the Internet
It consists of 32 bits
An IP address consists of two parts
... one identifying the network
... and one identifying the node or host.
Distinguish between the purpose of an IP and MAC address:
The IP address is set by the ISP
It is linked to the physical location of the device
This will change/update with the location of the device
Each device has a permanent/fixed MAC address
... set by the manufacturer
... and embedded on the network card
IP addresses use 32 bits/4 bytes
MAC address use 48 bits/6 bytes
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller jhay208. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for £5.99. You're not tied to anything after your purchase.
