Well today I'm going to go back and discuss about Bus topologies, because it seems like a tough subject! Well not really. its a very easy and interesting concept to grasp in NET +. Just imagine a row of buses, it's as simple as that.
Today we are going to talk about Repeaters.
Have you ever had a signal go weak on you? Well I haven't really, had a signal go weak on me, but I bet it happens to people all the time!
Repeters Work on the physical layer of the OSI model! Repeaters pretty much make signals stronger! Simple, and easy to understand
Bridges and Routers
They provide a way of segmenting network traffic and connect different LAN types.
Now If you plan ahead, you can efficiently use Routers and create a great system in which you can have an incredible communications environment!
Monday, September 24, 2007
Thursday, September 20, 2007
Net + Lesson 5
What is... and Operations Manager? Do you know? Well? Come on out with it... Let me know what an Operations Manager is! Well I guess i can give a small explanation for the whole thing about Operation managers!
It's pretty much like a secret agent that you put into your computer, so it can monitor the computer!
It watches a lot of things on the computer, such as Windows Event log for alerts etc!
There are a few Versions of Operations Managers
- Microsoft Operations Manager 2000
- Microsoft Operations Manager 2005
- System Center Operations Manager 2007
Well I know it's a random topic about operations managers, but My teacher talked about it today, and this is actually the notes he gave me... so I'm posting it!
Today we are going to talk about the differences between Baseband vs. Broadband!
- The baseband transmision method uses the media so that the cable is taken up by a single transmission
- Broadband communications, the communicators use different frequencies to seperate their messages from others by using the same media at the same time!
More tomorrow... we'll talk about Half-duplex... full-duplex!
It's pretty much like a secret agent that you put into your computer, so it can monitor the computer!
It watches a lot of things on the computer, such as Windows Event log for alerts etc!
There are a few Versions of Operations Managers
- Microsoft Operations Manager 2000
- Microsoft Operations Manager 2005
- System Center Operations Manager 2007
Well I know it's a random topic about operations managers, but My teacher talked about it today, and this is actually the notes he gave me... so I'm posting it!
Today we are going to talk about the differences between Baseband vs. Broadband!
- The baseband transmision method uses the media so that the cable is taken up by a single transmission
- Broadband communications, the communicators use different frequencies to seperate their messages from others by using the same media at the same time!
More tomorrow... we'll talk about Half-duplex... full-duplex!
Tuesday, September 11, 2007
Net + Lesson 4
In today's lesson we will cover more things that have to do with.... NET + hahaha!
Today we are going to talk about the OSI model. Open Systems Interconnection Basic Reference Model
The OSI model has several layers... infact it has 7 whole layers. that's a lot of layers. The Seven Layers are as follows
7. Application
6. Presentation
5.Session
4.Transport
3. Network
2. Data link
1. Physical
Yeah it's back wards... in fact it goes from the bottom up.. kind of weird huh?
Today we are going to cover just two of the OSI model layers! First we'll discuss the Physical layer and the data link layer!
1. Physical layer-
This pretty much controls how data is transmitted across the media.
2. The OSI Data link layer-
The data link layer tells how devices attached to a network gain access to the various computing resources
There are two sub layers in the Data link layer:
-The logical Link control (LLC)
-Media Access Control (MAC)
Today we are going to talk about the OSI model. Open Systems Interconnection Basic Reference Model
The OSI model has several layers... infact it has 7 whole layers. that's a lot of layers. The Seven Layers are as follows
7. Application
6. Presentation
5.Session
4.Transport
3. Network
2. Data link
1. Physical
Yeah it's back wards... in fact it goes from the bottom up.. kind of weird huh?
Today we are going to cover just two of the OSI model layers! First we'll discuss the Physical layer and the data link layer!
1. Physical layer-
This pretty much controls how data is transmitted across the media.
2. The OSI Data link layer-
The data link layer tells how devices attached to a network gain access to the various computing resources
There are two sub layers in the Data link layer:
-The logical Link control (LLC)
-Media Access Control (MAC)
Monday, September 10, 2007
Net + lesson 3
Today, we are going to discuss in Net + about topologies. Some say that topologies are the hardest concepts to capture in Net +... But i think it's the easiest thing to learn out of all there is to learn in Net +.
There are four main types of topologies:
-Bus
-Ring
-Star
-Mesh
They are all pretty much self explanatory. But we have to go into a simplistic way of looking at all of these Topologies in Net +. I'll explain it the same way as I've understood it.
Bus topology:
Imagine a school bus... go ahead... did you imagine a bus yet? What a bus topology is... just that... a row of computers in a line all connected to one another. there is computer A connected to B... B is connected to C... etc... and they are all linked! So if one crashes... they all crash!
A Ring topology:
Just like a bus... imagine a circle... with computers all surrounding the entire ring. But this one has a File Server and Mau... in order for them to work... none of the computers can be broken!
Star Topology:
It seems to be the best... because the way it is set up... that if one computer is broken or working improperly... all the other computers won't be affected... So There is a central hub... which has it's own connections to each different computer... which makes networking easy!
Mesh topology:
Think of Mesh topology as a messy topology... it's like a group of three freinds... that live in different parts of the state... and they all stay connected to one another... like this...
ABCD
EFGH
A connects to E... F... G.... H
B connects to E...F...G...H...
ETC!!!
More next time folks... more on Net + and Networking!
There are four main types of topologies:
-Bus
-Ring
-Star
-Mesh
They are all pretty much self explanatory. But we have to go into a simplistic way of looking at all of these Topologies in Net +. I'll explain it the same way as I've understood it.
Bus topology:
Imagine a school bus... go ahead... did you imagine a bus yet? What a bus topology is... just that... a row of computers in a line all connected to one another. there is computer A connected to B... B is connected to C... etc... and they are all linked! So if one crashes... they all crash!
A Ring topology:
Just like a bus... imagine a circle... with computers all surrounding the entire ring. But this one has a File Server and Mau... in order for them to work... none of the computers can be broken!
Star Topology:
It seems to be the best... because the way it is set up... that if one computer is broken or working improperly... all the other computers won't be affected... So There is a central hub... which has it's own connections to each different computer... which makes networking easy!
Mesh topology:
Think of Mesh topology as a messy topology... it's like a group of three freinds... that live in different parts of the state... and they all stay connected to one another... like this...
ABCD
EFGH
A connects to E... F... G.... H
B connects to E...F...G...H...
ETC!!!
More next time folks... more on Net + and Networking!
Net + Lesson 2
Today we will discus the Role of Network Operating Systems, servers, workstations, and hosts!
What is a network operating system you ask? Well In computer lingo it's NOS. It runs on a server in a cleint/server network configuration and turns a PC into a network server...
Servers:
A server is a computer that was made to use, or run NOS's!
Workstations:
Is a personal computer that is pretty much connected to a network, which can do stuff through applications and utilities.
Hosts:
It pretty much any network device that has a TCP/IP address
There are many kinds of Servers out there...
a few of them include
CD servers
E-mail servers
Fax servers
Print servers.
We'll discuss about CD Servers today as well.
It usually is alone, and consists of four or more, CD-ROM readers... could be up to 100 CD ROM readers.
E-mails Servers:
Is pretty much what e-mail is. there is a server that holds all the mail coming in from the internet.. and it just sends it out to the appropriate place!
Well that's all for today... more tomorrow!
What is a network operating system you ask? Well In computer lingo it's NOS. It runs on a server in a cleint/server network configuration and turns a PC into a network server...
Servers:
A server is a computer that was made to use, or run NOS's!
Workstations:
Is a personal computer that is pretty much connected to a network, which can do stuff through applications and utilities.
Hosts:
It pretty much any network device that has a TCP/IP address
There are many kinds of Servers out there...
a few of them include
CD servers
E-mail servers
Fax servers
Print servers.
We'll discuss about CD Servers today as well.
It usually is alone, and consists of four or more, CD-ROM readers... could be up to 100 CD ROM readers.
E-mails Servers:
Is pretty much what e-mail is. there is a server that holds all the mail coming in from the internet.. and it just sends it out to the appropriate place!
Well that's all for today... more tomorrow!
Sunday, September 9, 2007
Net +... computer basics
I'm into computers and I'm a very technical guy! I love computers and I love using it! Today I'm gonna talk about the different types of networks.
1. A legacy network:
- In a legacy network all of the processing takes place at the central computer. That means that anything you do... on ur computer... it all is actually done on one main computer.
- It's very hard to get softwards and other products for legacy networks.. most of the applications are custom built... and it becomes pretty darn expensive.
2. Peer to Peer networks:
See the simple explaination of this network... is that everything... is done on each persons seperate computers... All of the files are in their own computers... Each computer has the ability to transfer files to one another... that's why it makes file sharing and using one printer easier!
The last one I will be talking about today is About a WAN
WAN:
WAN means its a Wide area network... it covers a really big geographical area, it can be as big as the national or international level. They have low to high speed links... this is a great type of server and is very useful int eh internet world! Hope this was helpful... More later!
1. A legacy network:
- In a legacy network all of the processing takes place at the central computer. That means that anything you do... on ur computer... it all is actually done on one main computer.
- It's very hard to get softwards and other products for legacy networks.. most of the applications are custom built... and it becomes pretty darn expensive.
2. Peer to Peer networks:
See the simple explaination of this network... is that everything... is done on each persons seperate computers... All of the files are in their own computers... Each computer has the ability to transfer files to one another... that's why it makes file sharing and using one printer easier!
The last one I will be talking about today is About a WAN
WAN:
WAN means its a Wide area network... it covers a really big geographical area, it can be as big as the national or international level. They have low to high speed links... this is a great type of server and is very useful int eh internet world! Hope this was helpful... More later!
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