ICONS AND SYMBOLS:
1.)ATM
2.)ROUTER
3.)SWITCH
4.)COMMON SERVER
5.)ISDN SWITCH
6.)BRIDGE
7.)PC
8.)LAPTOP
9.)PHONES
10.)FILE SERVER
11.)HUB
12.)MODERN
13.)PHONE COSTUMER
14.)NETWORK CLOUD
15.)BUILDING
16.)HOME OFFICE
DATA NETWORK-sharing data through the use of floppy disks is not an efficient or cost effective manner.
3 PROBLEMS:
1.)How to avoid duplication of equipment and resources.
2.)How to communicate efficiently.
3.)How to set up and manage a network.
2 CLASSIFICATION OF DEVICES:
1.)End user devices.
2.)Network devices.
NETWORK DEVICES-include all the devices that connect the end user devices together to allow them to communicate.
SWITCH-add more intelligent to data transfer management.
MESH TOPOLOGY-is implemented to provide as much protection as possible from interruption of services.
PHYSICAL AND LOGICAL TOPOLOGY:
1.)ETHERNET
2.)FDDI
3.)TAKEN RING
4.)BUS,STAR,OR POINT TO POINT
5.)RING
6.)STAR
7.)BUS
LAN'S ARE DESIGNED:
1.)Operate within a fimited geographic area
2.)allow multi access to high bandwidth media
3.)control the network privately underlocal administration
4.)provide full time connectively to local services
5.)connect physically adjocent devices
VIRTUAL PRIVATE NETWORK-a VPN is a private network that is contructed within a public network.
BANDWIDTH:
1.)bandwidth is limited by physics and teccnology
2.)bandwidth is not free
3.)bandwidth requirements era growing at a rapid rate
4.)bandwidth is critical
7 LAYER OF THE OSI REFERENCE MODEL
1.)application
2.)presentation
3.)session
4.)transport
5.)network
6.)data link
7.)physical
This layer deal with networking application.
