aizkie_cute:))

Hello,this is our third meeting.



                Types of transmission:

• Unicast
• Multicast
• Broadcast

Broad cast domain - a group of devices  receiving broadcast frames initiating from any device within the                                            group.

Routers- do not forward broadcast frames ,broadcast domain are not forwarded from one broadcast  to                      another.

Collision-the effect of two nodes sending transmissions simultaneously in ethernet when they  meet on the                      physical media  the frames from each node collide  and a damage.

Collision domain- network area in ethernet over which frames that have  collided will be  detected  collisions                            are propagated  by  hubs and and repeaters collisions are not propagated by                                                switches,routers,or bridges.


            TCP/IP  MATH

"IP Address classes"

class A :ONNNNNNN/ HOST/HOST/HOST
            Range(1-126)

class B:Range (128-191)/0NNNNN/NETWORK/HOST/HOST

class C: Range (192-223)/10NNNN/NETWORK/NETWORK/HOST

class D:Range(224-239)



Classes Inter -Domain Routing(CIDR)

         -basically the method that ISPSs(Internet Service Providers) use to  allocate of addresses to a                       company and a home.
ex:
     192.168.10.32/28

The slash notations (/) means how many bits are.

aizkie_cute:)))

Hello! This is our second meeting.This is all about the OSI Model.


OSI Model- use for  solving problems or tracing problems.


The OSI Reference Model:

• Application
• Presentation
• Session
• Transport
• Network
• Data-Link
• Physical

Application-this layer dealwith networking applications.
              ex:
                 email,web browsers

Presentation- is responsible for presenting the data in the required formal which may include:

•  code formatting
• encryption
• compression

Session- establishes,manages,and termates,sessions between two communicating hosts.

Transport-breaks up the data from sending host and then reassembles it in the receiver.

Network-sometimes referred to as the "cisco layer".
              -provides logical addressing that routers used for.

Data-link-provides reliable transit of data across a physical link,the devices: switch,bridge.

Physical-physical media through which the data.    

aizkie cute:))

        Hi mga ka blogger....this is our first meeting in I.T.
-2 Network Management/Principles....I hope you enjoy while reading my post.

Our topic is all about Networking- which means communicating through device.


ICONS:

•           ATM Switch  
•           Router
•           Switch
•           Comm Server
•           ISDN Switch
•           Bridge
•           PC
•           Laptop
•           Phones
•           File Server
•           Hub
•           Modem
•           Phone Customer
•           Network Cloud
•           Building
•           Home Office

Data Network is a sharing data through the use of floppy disks is not an efficient or cost effective manner.

       Businesses needed  a solution that would  successfully address the Three Problems:

• How to avoid duplication of equipment and resources.
• How to communicate efficiently.
• How to set up and manage a network.

                                           Two classification of Devices:

• End-User Devices:like computer,printers,file server,scanners,hub.
• Network Devices:like modem,ISDN Switch,router,switch.

      Network Interface Card (NIC) is a printed circuit board that provides network communication         capabilities  to  and from a Personal Computer.Also called LAN Adapter.


Network Topologies defines the structure of the network.

         Two Types of Network Topologies:

• Physical Topology- the actual layout of wire  or media.
• Logical Topology-defines how the media is accessed by the  facts for reading data.

Bus Topology -uses a single backbone cable that is terminated at both ends.

Ring Topology- connect one host to the next and the last host to the first.

Star Topology -connect all cables to a central point of concentration.

Extended Star Topology -links individual  stars together by connecting the hubs  and/or switches.The    topology can extend the  scope and coverage of the network.

Mesh Topology-meshy
                          -is implemented  to provide  as much protection as possible from interruption of service.