The switches are interconnected by the Inter-Switch Link port so that VLAN traffic
can cross multiple switches. A Layer-2 switch is a bridge, both switches and bridges
allow multiple ports to be active simultaneously. While every VLAN has an
equivalent bridge, the configuration required for bridging is related to the spanning-
tree algorithm. This allows the connected network topology to contain multiple
physical paths between two stations but constrains the active topology to a single-
span tree. Not only does a VLAN create a logical broadcast domain that spans
multiple physical LAN segments, it improves network performance by separating
large broadcast domains into smaller ones. VLANs aids with security enhancement by
creating a virtual boundary around that business unit. In addition, VLANs save
workplace disruption because there is no need to physically match up ports and
switches on a network. Routers between VLANs filter broadcast traffic, enhance
network security, perform address stigmatization, and mitigate network congestion.
The wireless technology I am most interested in seeing our future is Vehicle-to-
Everything (V2X) Wireless. This will open up employment opportunities for me in
the Information Technology field by troubleshooting, managing networks, and
implementing first call resolution protocols. VLANs prevent traffic, including
broadcasts and multicasts, from being propagated to members of other VLANs.
Switches are interconnected by the Inter-Switch Link (ISL) port so that VLAN traffic
can cross multiple switches. Both switches and bridges allow multiple ports to be
active simultaneously. There are 3 advantages to VLANs which are to help with
network efficiency by reducing extraneous traffic; enhance security by creating a
virtual boundary around that business unit; and improve bandwidth performance by
limiting node-to-node and broadcast traffic. Anything that becomes available like 5G
it will be a struggle for us going into the networking career because that is all new
to us and we will have to learn more than what we already know. The stuff we are
learning now is so different then what it was when i was in High school learning
this. I will be willing to learn what ever is thrown at me over the next few years.
Switches, bridges, and VLAN's function together similar to the way a traffic officer
interacts with a busy intersection, traffic, and pedestrians. The VLAN is like the
traffic officer in that is prevents traffic. It essentially keeps the traffic going to
where it is trying to get to and not get lost or picked up by other VLAN's. The
switches are like the street itself because they are interconnected to allow the traffic
to cross. Bridges also connect to allow the traffic to get to where it needs to go.
The advantage of a VLAN is that it integrates with the switches seamlessly, it keeps
data flowing smoothly through the system, and it makes sure your info gets to
where it is supposed to go. In the future, I anticipate most systems going completely
wireless allowing for less on-site inspections of a problem. A few key strokes and
problem solved! That will definitely affect my career because I want to be either the
one or on the team of IT pros that invent and implement that type of technology.
As far as wireless technology will be in the future we are changing it every day.
Every day we add an additional feature with updates with new iPhones with a better
resolution on the TV screen. These things all added together will eventually make
wireless TVs or just straight projector TVs and maybe some thing where it’s
completely wireless altogether and just from your mind is amplified out and to
screen for others to see. There are a lot of things that we have today that no longer
have wires that a different generation never imagined even possible to not have a
wire or even have some thing like an iPhone that is your phone as well as your
calculator and your lifeline. Going forward we can expect pretty much any
electronica device not to have wires for the convenience and the better slicker
looked at it does provide for the consumer. Pretty much any device as far as phone
earphones headphones any of that sort of item you already expecting today’s society
to not have a wire that would damper you down. It’s part of that moving forward
progressiveness that the rest of us are all four and use that to the advantage of the
wireless aspects. when I was working at a large department store, we had switches
and had what we called a network within a network, by using vlans to break up the
different departments on the switches. Take like our POS group (Point Of Sale) was
a vlan 10, computers and printers was vlan 20, pharmacy was vlan 30, automotive
was vlan 40, handhelds was vlan 70, etc. No matter what switch the devices was
connected to as long as the vlans were set correctly then the devices could
communicate with the others in their respected network without interfering with the
other departments in the store. To me, this created better reliability, better (faster)
response times, and less traffic on the main network. As far as the wireless
technologies coming out I have not heard of any new cutting edge tech in this area.
We used ap's and handhelds that operated in the 2.4 as well as the 5ghz ranges and
some 900 meg units as well, and I do remember one of the network gru's talking
about having to do a site survey on one of our stores due to the loss of
connectivity at one end of the building / parking lot. I learned that the switches are
great because they are interconnected and can transported VLAN traffic over multiple
switches, this in fact makes the bridge a switch because it bridges the traffic and
allows the information to travel to every device that is connected to the switch. The
advantages of the Vlans are to help users share information all at once. for instance
a small company with about 10 users can have a single LAN and and switches and
bridges and turn it into a VLAN and all users on the network can work together
across the the servers. I personally have a switch in my home for my company but
I am using home based internet on the side where there is not being business
conducted the switch allows that traffic to working independently but my company
side with the server inlace allows all three computers to share information and never
interrupt or see my personal computer information. Switches, bridges, and VLAN's
all work together to help network flow and congestion, while letting the information
get sent to the correct place. I don't know if this is correct, but it reminds me of a
call center to some degree. A receptionist decides what you are calling about and
what the appropriate person/department would be, then connects you to that specific
destination. There are a few different benefits to using a VLAN. The first one is
security. VLAN's can give you better network security because the admins have
control over port and also the user. Another advantage of a VLAN is the cost that
is attached to it. Segmenting a large VLAN to smaller VLANs is cheaper than
making a routed network with routers because normally routers are more expensive
than switches. The third reason that VLAN's are a good choice is the ability for
broadcast control. This one was a little confusing to me at first, but I believe that I
understand it now. A network administrator now has the ability to see the list's of
traffic flow and can decide who or what has access to it, thus optimizing traffic. I
know that 5G telephone service has started moving into Montana and that could
affect the speed of how things get done. Whether it be by phone or teleconference,
this could make a connection difference. They all function together because that is
the way that technology is brought together. You need to understand all these
techniques before you can be able to work a general computer or data basis. You
should study all of the needed functions that there are to know about what is going
on. You should realize what is going on before you stop and try to put it all
together throughout the needed area. You should know what you are doing within
these functions. They are important and you do not want to cross them because you
will end up having some trouble and you do not want that. You should know that
you need to understand everything that is going on. Everything that is going on is
needed and in a needed area. You should know where to exactly put the functions
and have the technology exactly where you need it to be. You need to justify some
areas so that you have everything that is needed to put into the input. The input of
the functions are important as well. imagine you're in a call center that operates on
a few different floors. The call center has a few different departments. You can
connect all of the computers to the switches, but all of the computers are going to
receive each other's network traffic, and the network can get a little congested. One
solution would be to physically group the different department computers together
and add additional hardware (I'm not sure what the additional hardware in this
scenario would be...) to segregate them from the others on the network, OR you can
create VLANs for each department. With the separate VLANs, the switch only sends
the frames designated for the specific VLAN to that VLAN.
By segregating the departments this way, you're able to apply specific permissions to
the individual departments. This is helpful if there are things that a Fraud department
need to have access to that Customer Service doesn't need to see, for example. The
bridge acts as more of a filter, and I think you would find the bridge at the centre
of the network connected to switches, each sending and receiving information for
their respective domains. The bridge receives frames and decides if that frame needs
to be forwarded or not.As far as wireless technologies is concerned, I'm still learning
about the technologies that are available, and I don't know very much about it just
yet. The first thing to come to mind is the cellular carriers that are beginning to roll
out 5G technology, and I'm interested to see how that works and if it truly is an
improvement. I have a friend who is actually refusing to upgrade her phone because
she's convinced 5G will give her cancer. Interesting times we live in, ladies and
gents. Switches, Bridges, and VLAN's work together to extend our networks causing
less collisions. Switches help each location maintain speed and its own collision
domain. When using VLAN's each VLAN is like it's own subnet or individual
network. This is used very often, as I have seen it, but did not realize it was
VLAN's in use. Switches allow us to connect to one VLAN per port or multiple
VLAN's if the port is designated as a trunking port.
As far as Wireless technologies in the future, that is a tough question. We are
always creating and learning new things and advancing technology. At the time of
this writing we did not have or atleast not in practice, 5G cellular technology. I'm
sure they will continue to expand the cellular capabilities. I know their are WI-Fi
hotspots all over now but in the future they will probably be at every corner of the
globe that has access to electricity. VLAN keeps things separate, so not everyone
gets hit with all the network traffic at the same time. VLANs reduce the amount of
packets being sent through the network which reduces congestion and improves
latency overall. VLANs keep smaller parts of networks working independently from
the greater network as a whole which can also help with security, by reducing the
number of devices that get hit with packets with sensitive information. VLANs also
allow for a more flexible network topology by allowing segments to be shared
regardless of physical location which can help reduce costs by allowing smaller
teams to be positioned farther apart but still working together to reduce network
traffic. Bridges break up the network into smaller more manageable chunks but they
do this through software. Switches do the same but more and through dedicated
application specific hardware which makes things happen faster.In the future I'm
really hoping to see someone implement a low earth orbit wireless network globally.
The potential for humans to greatly increase the entirety of human knowledge and
the potential geniuses we have lurking around that simply need access to legitimate
credible sources to further their educations. It would be incredible. Imagine some kid
being able to quench their thirst for knowledge while still living way out in the
sticks, and having their full potential reached by having this kind of access. With
this kind of impact I'm hoping to be put out of a networking career completely by
having some revolutionary idea implemented that makes everything else completely
obsolete. SpaceX is working on this currently but I don't see this really being
practical for a long time. The VLAN and Bridge application permit you to arrange
groups of ports independent of their physical area as a virtual LAN. Ports or groups
of ports in a VLAN are called VLAN individuals. VLANs forestall traffic, including
broadcasts and multicasts, from being proliferated to individuals from different
VLANs.Switches are interconnected by the Inter-Switch Link (ISL) port so VLAN
traffic can cross numerous switches. A Layer-2 switch is essentially a bridge. The
two switches and bridges permit different ports to be active simultaneously.Each
VLAN has an equivalent bridge. The greater part of the configuration required for
bridging is identified with the spanning tree algorithm, which permits the associated
network topology to contain different physical paths between two stations yet obliges
the active topology to a single-span tree. In the event, if a port on one bridge fails,
different bridges can reconfigure the topology and change traffic to new paths. A
VLAN, hence, can be viewed as identical to a bridged LAN.In the future, networks
will be more automated, 5G and Wifi 6 is the next evolutionary step in our homes
and offices, AI and ML Will lead to Autonomous Networks, and SD-Wan will
become standard. How do switches bridges and VLANs work together? Well lets fist
look at a bridge. I bridge will link two routers together in you network. A switch is
going to give you different paths to the network for each of your computers to work
on. what the switch is going to do is be like the lines in the roads that we drive
on. That each lane is there so nothing Collides with Each other. How a VLAN
work is connecting the switches to each switch. So, if in your home or office if you
need to have your devices working on two different networks you can use a VLAN
to connect the two to gather to share and info that you need. At one of my job we
have the main computer that connects to our home office where it leads out to a
switch that give the other computer at work access to the info that the main CPU
has. If you look a cash regsters at store they can connect to each other to show
what has been sold and what has not been sold but they can’t get on line to look
anything up they send the info back to the main CPU to tell the home office what
inventory has been sole in that store. With working for a cell phone provide I see
that one of the biggest that that is changing with wireless technologies is that we
might not have any more fiber Optical lines or cable lines running into buildings
anymore everything is going to be working off of cell phone towers which might
make it hard to pin point where the Failure is in the network. some advantages of
VLANs that I can see from what I have looked up and read on , Since a VLAN is
a logical broadcast domain , creating them isolates broadcasts, narrows the broadcast
range and controls the generation of broadcast storms. Also it improves the overall
security of the network. You can control user rights and logical network size. It also
makes network management more user friendly. VLAN can divide network users in
different geographical locations into one logical network. From what I have seen Li-
Fi seems pretty interesting as far as new networking technology. It uses visible light
waves instead of radio waves. Also it offers faster speeds and improved security
with lab tests showing it hitting speeds of 224Gbps. The difference between switches
and bridges comes down to how they perform their duties on a hardware level.
Switches have ASIC’s chip while bridges use software to perform their function.
And from my understanding scalability is easier with the switch because with a
bridge you must use hubs as well. Security is always a factor while setting up a
network, using a VLAN helps with that. For example, if you have different sections
under your VLAN like an engineering department VLAN helps segment it from
other users like someone from accounting that might not need access to that
information. Something I currently use at work with VLAN it was all the registered
devices and gives access to a specific application to complete work. Another perk of
using VLAN is traffic flow, the administrator can have an access list that limits the
people able to receive information and in turn reduces the amount of data being
sent.
With things to come in the future I can see this being more streamlined, like having
devices that are able to do more. Doing such tasks as routing, supplementing for
multiple switches which would get rid of trunking, and having it set up its on
VLAN. This all might be wishful thinking but technology keeps moving. Switches
are basically just bridges with more ports. They function similarly except bridges use
software to make filtering decisions whereas switches use hardware. They can be
used to create VLANs by having specific ports assigned to which ever VLAN you
want. The ports on the switch will then only communicate with other ports on the
same VLAN. One of the advantages that you gain from using VLANs is that you
can place a host anywhere on the physical LAN and still have them only able to
use resources available to them on their assigned VLAN. Trunk ports can be
configured so that multiple VLANs can access the resources along with trunk links
that let VLANs span several switches. VLANs are also able to separate broadcast
domains because they only communicate within themselves, freeing up bandwidth. As
for the wireless technology, I read an Ars Technica article recently about how a
company is working on using light to deliver fast internet wirelessly, “Like fiber,
without cables.” The biggest problem being that it requires line-of-sight, but I think
there could be some cool applications for it. Bridges have a limited number of ports
and other network services they could provide, and that's when Layer 2 switches
come to assist. Bridges uses a software to create and manage a filter table, but they
also use applications specifically for integrated circuits . Switches and bridges are
faster than routers because they don't take up time looking at the Network layer
header information. They will focus on looking at the frame hardware addresses
before deciding to forward, flood, or drop the frame. In a switch they create a
private dedicated collision domains and provide independent bandwidth on each port.
With a VLAN (virtual local area network) is a logical grouping of network users
and resources connected to administratively defined ports on a switch. Within a
VLAN you'll have the ability to create a smaller broadcast domains within a Layer
2 switched internetwork by assigning the various ports on the switch to different
subnetworks. You will also see that the hosts within each VLAN you can only
communicate with each other but not with anything else. VLANs are created by a
system administrator who proceeds to assign switch ports to each one. VLANs of
this type are known as Static VLANs. Creating a static VLANs one of the most
common reasons for them is because they are the most secure. The security stems
from the fact that any switch port you've assigned a VLAN association to will
always maintain it unless you change the port assignment manually.Another example
of the use of a VLANs is when using a static access ports are either manually
assigned to a VLAN or assigned through a Radius server for the use with
IEEE802.1X. There's also the dynamic VLAN determines a host's VLAN assignment
automatically. And a switch port can belong to only one VLAN if it is an access
port or all VLANs if it is a trunk port. I really can't say one technology I can pin
point right now I anticipate on coming up in the future, but what I would like to
see more technology focusing in on people with disabilities mainly ones in a
wheelchair. Being a person in a wheelchair right now were faced with so many
different types of obstacles to overcome to even full normal and not having people
look at us weird or helpless. I'm certainly not a helpless person. Anything to make
our lives easier I'm all for it and even would love to work with someone on
developing materials. a switch has a limited number of ports to build. when you link
these ports together to create a vlan you need a connection in and out of that
switch to make them have a road. however when you use a bridge that makes a
one lane road with ability to go both ways there for giving you more ports to use
for other connections. vlans have a fair share of benefits, one of the easiest to
notice will be security. when you have 1 network with 100 users its harder to
secure that connection however when you have 4 networks with 25 users on each its
easier to access the threats each group is facing and divide and conquer was created
and this is a example of its use. Vlans create a smoother traffic flow which helps
make a better connection. the last and most notable benefit would be the trouble
shooting process is easier when you have multiple smaller networks instead of 1
large one.Future technology is scary at times but it also brings in the chance to
improve old process's. I think one of the future wireless technologies that i hope i
will see in my future is virtual reality for meeting and shopping. much like in ready
player one where the world connects through 1 big social virtual space i think that
being emerged into the world you are accessing with others at the same time like
having a meeting from NY with a partner in Tokyo will feel more connection then
using a phone. think of it like when the jedis have meetings and some are off
planet they are holo projected to feel more involved. VLAN's use a switch or a
bridge to communicate with a network virtually. A computer that is connected to the
network via ethernet which is connected to a switch could have a VLAN connection
with this same network. Typically a VLAN is found in a wifi connection like a
laptop using a VPN. The systems that are connected to this virtual network can be
grouped together with other users not using the same switch or bridge. This helps to
simplify a group policy when a users workstation may need to physically move or
keep the user online using different equipment. These examples of wireless transition
without moving a LAN is advancing more and more. I think that with Space X
advancement into the ISP side using Starlink will make a massive spike in wireless
connection and technology. Now this technology will be primarily used in a house to
connect to a LAN but since Space X is going to be using Starlink to fund the
future mars expedition then i could see this technology also expanding into the
commercial side. This transition could make wireless VLAN technology not only
more convenient but also faster. VLANs prevent traffic, including broadcasts and
multicasts, from being propagated to members of other VLANs. Switches are
interconnected by the Inter-Switch Link (ISL) port so that VLAN traffic can cross
multiple switches. A Layer-2 switch is basically a bridge. Both switches and bridges
allow multiple ports to be active simultaneously. Every VLAN has an equivalent
bridge. Most of the configuration required for bridging is related to the spanning-tree
algorithm, which allows the connected network topology to contain multiple physical
paths between two stations but constrains the active topology to a single-span tree. If
a port on one bridge fails, the other bridges can reconfigure the topology and switch
traffic to new paths. A VLAN, therefore, can be considered equivalent to a bridged
LAN. Three advantages if VLANs are: broadcast control, security, and cost.
Broadcasts are required for the normal function of a network. If we segment a large
LAN to smaller VLANs we can reduce broadcast traffic as each broadcast will be
sent on to the relevant VLAN only. VLANs provide enhanced network security. In a
VLAN network environment, with multiple broadcast domains, network administrators
have control over each port and user. VLANs help to restrict sensitive traffic
originating from an enterprise department within itself. Segmenting a large VLAN to
smaller VLANs is cheaper than creating a routed network with routers because
normally routers costlier than switches. Switches, bridges, and VLANs function
together to make it possible for multiple users to be on the same VLAN without
physical space and/or location being an issue. Figure 11.16 in module 4.4 sums it up
perfectly. You can have a switch connected to additional switches to allow each
switch port to be assigned a VLAN membership. Using the example in module 4.4,
physical location will not be an issue for the new Sales representative by creating a
VLAN.There are a few advantages of VLANs. VLANs are used to group switch
ports to create a separate network segment. This is perfect to have separate
departments on separate networks. One's physical location does not matter with
VLANs. At my job, we have close to 100 people in my department, but we are
scattered throughout the building. Security and control are both vital. You create the
VLAN on the switch and you decide on the port that belongs to the VLAN. Also,
you can't just plug a host into a switch. You have to verify the VLAN membership
of that port in order to gain access to the network services.Technology is advancing
daily. I watched a video of someone that built a robotic suit that was similar to the
Iron Man suit in the Avengers movie. He was able to float in the air. After seeing
that, it reminded me that sky is the limit with any type of technology. But as these
advances are made, I believe it means more opportunities will be available in our
networking careers because there is always going to be something new. This means
there will always be need for networking technicians among other technicians. The
advantage of a VLAN is the security that it provides from both internal and external
threats. VLAN also have an easier fault management, also an improved quality of
service. An example of VLAN security is that internally it separates users to be
responsible for their network that the user has access to. When it comes to faster
fault management is because a VLAN has segmented users are isolated from each
other allowing to narrow down the problem quicker. With a VLAN quality of
service it allows less latency problems it also allows prioritizing the flow of traffic.I
think that in the future more networks will become wireless. Things like 5G coming
out will soon take over the office networks and will replace the server farms. I
think that with this change that it may cause me to have to learn more about how
a wireless network works over a hard wired network such as switches, bridges and
VLANs. After doing my reading and a little research, I came to an understanding
that VLANs, switches, and bridges all play their role in making a network work
efficiently. VLANs blocks traffic for other members or users of other VLANs.
Switches are like traffic lights; that's how I wanted to look at it. Switches receive
and direct data to the designated device. Both switches and bridges allow multiple
ports to be active, which is a great thing. To get a better understanding of VLANs,
they create their broadcast domain, and the only way two VLANs can communicate
is if a router was connected to the two. There are plenty of advantages of VLANs;
one is that they provided segmentation services that are typically service provided by
routers to reduce equipment cost. Security is a plus when using a VLAN as well
each VLAN is identified by a single IP subnetwork so any packets passing through
will be tagged with that VLAN ID. VLANs also react quickly to host relocation;
this is because of the persistent tag on the packets that come through the VLAN.
