This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Hub What is a hub? A machine acting as a central relay point on
a star topology How does it work? Think of a hub as a repeater. It
basically takes all traffic on an Ethernet network and rebroadcasts
it. Explain when and where the device might be used. With the cost
of switches declining you probably wouldnt want to use a hub. You
could still use a hub to network computer together for file sharing
or gaming. Cost They are relatively inexpensive now ranging from
$12 to $100
Slide 3
Hub (Diagram)
Slide 4
Switch What is a switch? A machine acting as a central relay
point. The same as a hub but its intelligent. How does it work? A
switch works much like a hub, but more efficiently. The switch will
learn about the network and route network traffic only to the
intended user. Explain when and where the device might be used.
Switches are the backhaul to many networks and are used by almost
every company that has a network. Cost They are relatively
inexpensive now ranging from $20 to $1,000s depending on network
size
Slide 5
Switch (Diagram)
Slide 6
Router What is a router? A machine acting as a central relay
point on a network. It forwards data packets between networks. How
does it work? It takes data lines from different networks and
routes data to the intended destination. It utilizes routing
tables, routing policies, and packet headers to decipher the true
destination of data. Works on OSI Layer 3. Explain when and where
the device might be used. Many of us own routers and use them to
connect to the internet via an ISP (Internet Service Provider) Cost
They are relatively inexpensive now ranging from $20 to $1,000s
depending on network size
Slide 7
Router (Diagram)
Slide 8
Bridge What is a bridge? (a). A local area network (LAN) device
that connects network nodes. (b). A machine acting as a central
relay point on a star network topology using MAC address How does
it work? A bridge operates on Layer 2 of the OSI model. It operates
much like a switch but usually only supports one network boundary.
It essentially connects multiple networks to form one. You can
create a network bridge to manage your lan segments and create a
single subnet for the entire network. Explain when and where the
device might be used. This would be used in most small business and
home offices because of the simplicity. However its usually not a
hardware bridge. Cost They are relatively inexpensive now ranging
from $20 to $100 depending on network size. For large business this
could be even higher.
Slide 9
Bridge (Diagram)
Slide 10
Gateway What is a gateway? Is a device that that communicates
with your ISP (Internet Service Provider) for you and brings in
data from the ISPs routers. How does it work? Well generally your
home modem acts as your gateway. It request an IP address from your
ISP. Explain when and where the device might be used. This is used
to connect to the internet just about everyone uses a gateway to
connect to the internet. Cost They are relatively inexpensive now
ranging from $30 to $100 depending on network size. For large
business this could be even higher.
Slide 11
Gateway (Diagram)
Slide 12
Firewall What is a firewall? A security feature on a network
that filters unwanted traffic from entering a network or a computer
How does it work? It basically filters/inspects the information
coming into your network from the outside. It works much like a
firewall in a house. It keeps unwanted traffic out or from
spreading. Explain when and where the device might be used. This
device or software is used on most home network and almost all
business networks. You should always have a firewall to prevent
unauthorized access to your network. Cost They are relatively
inexpensive ranging from free for software version to hundred of
thousands of dollars for physical devices.
Slide 13
Firewall (Diagram)
Slide 14
Wireless AP What is a wireless ap? A device used to connect
wireless nodes and relay traffic among these nodes How does it
work? These devices allow a wired network to become wireless by
allowing Wi-Fi signals to be transmitted. Devices that are equipped
to pickup these signals can connect to the network. Explain when
and where the device might be used. This is used in most homes and
business today. You can find them in Starbucks and even rest stops
of major highways. Cost They are relatively inexpensive now ranging
from $30 to $100 depending on network size. For large business this
could be even higher.