1752508
Description
Mind Map by ayoub_sebtane, updated more than 1 year ago
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Created by ayoub_sebtane
almost 10 years ago
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E - Network Components
- Switch
- Filters data packets as they are
received and forwards it to the
appropriate destination device
- Switch conserves network bandwidth by only
delivering the message to the device it was
intended. This offers better performance than a
hub.
- Filters data packets as they are
received and forwards it to the
appropriate destination device
- Hub
- Similar to switch but sends
data packets to every port it's
connected to; without
examining them.
- Data has to be filtered by
each device it is sent to,
once it has been received.
- Data is more
susceptible to
interception
- Similar to switch but sends
data packets to every port it's
connected to; without
examining them.
- Network interface card (Wireless)
- A NIC enables a computer
to be connected to a
network using a cable
- A wireless NIC allows the
device to connect to a
wireless access point,
therefore connect to the
network
- Each NIC has a Media Access Control
(MAC) address which is unique. Other
devices that are connected to networks
also have unique MAC addresses so they
can be identified.
- A NIC enables a computer
to be connected to a
network using a cable
- Router
- It sends data packets to the devices
using the most efficient route, which
is based on information stored in
routing tabels.
- A router is an advanced version of a
switch. It stores address of connected
devices & sends data packets to recipient
devices.
- It sends data packets to the devices
using the most efficient route, which
is based on information stored in
routing tabels.
- Repeater
- This sits between two long cables
and extends the range of the
cables so the signal doesn't
deteriorate
- It receives the signal from
one cable and re-sends it
along the next cable
- This sits between two long cables
and extends the range of the
cables so the signal doesn't
deteriorate
- Wireless Access Point (WAP)
- A WAP is a hub that communicates wirelessly instead
of having physical connections through ports.
- The WAP connects to the main network
infrastructure through a single cable
connected to a switch
- When a WAP receives a signal intended to be received by
a wireless device, it broadcasts it & the receiving device
collects data packets.
- A WAP is a hub that communicates wirelessly instead
of having physical connections through ports.
- Gateway
- This is the exit from one network and
the entrance to another network
- It creates a bridge
between two networks
- A bridge joins two networks together so
it looks like one large network
- A bridge joins two networks together so
it looks like one large network
- This is the exit from one network and
the entrance to another network
- Firewall
- A firewall is an application that is configured on a
computer/network device to prevent
unauthorised access to or form a network
- It works by examining all data coming into
and out of a network & blocks access to
unacceptable traffic
- A firewall is an application that is configured on a
computer/network device to prevent
unauthorised access to or form a network
- Servers
- Application
- Software stored on the server for
use across the network
- Software stored on the server for
use across the network
- Mail
- This server gives a private, internal email
system meaning that all of the emails are
sent securely across the server
- Users email addresses are all stored on
the server so they can be seen on the
contact list of each connected user
- This server gives a private, internal email
system meaning that all of the emails are
sent securely across the server
- Backup
- This server backs-up all of the files on the
server on the network, meaning that individual
users don't have to do it themselves
- This server backs-up all of the files on the
server on the network, meaning that individual
users don't have to do it themselves
- Print
- The print server puts all the print jobs
for each printer into a queue and deals with
them in turn
- The print server puts all the print jobs
for each printer into a queue and deals with
them in turn
- Proxy
- Stores details about recently visited web
pages in a cache, allowing the page to load
quicker if the user re-visits the page
- Stores details about recently visited web
pages in a cache, allowing the page to load
quicker if the user re-visits the page
- File
- Current files can be stored on the server and
accessed on any device connected to the network
- Can also have shared files that can
be access by all users on the
network
- Files on the server can be accessed
externally if the user can connect to the
server via their username and password.
- Current files can be stored on the server and
accessed on any device connected to the network
- Application
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