Section B Flashcards
What are the different type of networks
Local area network
Personal area network
Wide area network
Wireless local area network
Storage area network
What is a local area network
A local area network is one that spans a relatively small geographical area, usually a building or site
What are the benefits of a local area network
- Can share peripherals such as a printer which reduces
- Can share files and software applications between devices without the need to use external methods
- Improved security because it’s centralized
What is a Wireless local area network
The same as local area network but uses wireless connections
What are the benefits of a wireless local area network
- No cables trailing around, which reduces tripping hazards
- doesn’t require physical access points which limits connectivity
What is a storage area network
It’s another type of LAN, however its a specifically specialized high-speed network designed to provide block level access to data storage, it’s only used for storage and is kept separate from the LAN
What are the benefits of a storage area network
It’s used when there are large and ever expanding data storage requirements
WHAT IS A WIDE AREA NETWORK
THIS IS A NETWORK THAT SPANS A LARGE GEOGRAPHICAL AREA SUCH AS AN ENTIRE COUNTRY OR THE WHOLE WORLD
WHAT IS A PERSONAL AREA NETWORK
A PAN IS A NETWORK THAT IS USED TO CONNECT DEVICES WITHIN THE RANGE OF A SINGLE PERSON
WHAT IS THE INTRANET
AN INTRANET IS A NETWORK THAT USES COMMON INTERNET PROTOCOLS SUCH AS TCP/IP, IT GIVES YOUR LOCAL AREA NETWORK OR PRIVATE WIDE AREA NETWORK ACCESS TO INTERNET SERVICES SUCH AS PRIVATE WEBSITES
WHAT IS THE EXTRANET
THIS IS A PRIVATE INTRANET THAT IS ACCESSIBLE BY SELECTED EXTERNAL ORGANISATIONS SUCH AS SUPPLIERS OR CUSTOMERS, IT ALLOWS YOU TO PROVIDE INFORMATION WITH THIRD-PARTIES WITHOUT PROVIDING ACCESS TO THE ORGANISATIONS ENTIRE NETWORK
WHAT IS THE INTERNET
A WORLDWIDE NETWORK THAT IS MADE UP OF INTERCONNECTED SMALLER NETWORKS TO ALLOW FOR GLOBAL COMMUNICATION
WHAT ARE THE BENEFITS OF WIRELESS CONNECTIVITY
- MODERN COMPUTERS DON’T PROVIDE AN ETHERNET PORT AND RELY ENTIRELY ON WIRELESS CONNECTIONS
- ALLOWS VISITORS TO EASILY CONNECT TO A BUSINESSE’S NETWORK IN ORDER TO ACCESS RESOURCES
WHAT ARE THE DRAWBACKS OF WIRELESS CONNECTIVITY
- EASIER FOR MALICIOUS USERS TO CONNECT TO THE NETWORK
- IF THE CORRECT INFRASTRUCTURE, POLICIES AND TOOLS ARE NOT IN PLACE, THEN SOMEONE THAT CONNECTS TO THEIR WAN CAN CAUSE SERIOUS DAMAGE
WHAT IS A PHYSICAL NETWORK TOPLOGY
A NETWORK TOPOLOGY DETERMINES HOW DEVICES ON A NETWORK ARE PHYSICALLY ARRANGED( THE WAY CABLES ARE USED AND ARRANGED)
WHAT ARE THE DIFFERENT TYPES OF NETWORK TOPOLOGIES
- STAR
- MESH
- HIERARCHAL
- EXTENDED STAR
- WIRELESS MESH
WHAT IS A STAR TOPOLOGY
A STAR NETWORK TOPOLOGY CONSISTS OF A CENTRAL HUB WITH EACH NODE(A DEVICE WITH THE NETWORK) CONNECTED TO IT
WHAT ARE THE ADVANTAGES AND DISADVANTAGES OF THE STAR NETWORK TOPOLOGY
ADVANTAGES
- IF ONE NODE GOES DOWN THE NETWORK WILL CONTINUE TO RUN EXCEPT FOR THE CENTRAL HUB
- EASY TO SET UP AND TROUBLE SHOOT
DISADVANTAGES
- REQUIRES A LOT OF CABLING WHICH MAKES IT EXPENSIVE TO SET UP AND MAINATIN
- IF THE ROOT NODE GOES DOWN THE WHOLE NETWORK WILL ALSO GO DOWN
WHAT IS THE EXTENDED STAR TOPOLOGY
IT USED THE SAME FRAMEWORK AS THE START TOPOLOGY BUT HAS EXTRA LAYERS TO EXTEND THE MAXIMUM RANGE
WHAT ARE THE ADVANTAGES AND DISADVANTAGES OF THE EXTENDED STAR TOPOLOGY
ADVANTAGES
- IT HAS GREATER RANGE THAN THE STAR TOPOLOGY
DISADVANTAGES
- FURTHER INCREASES THE COSTS DUE TO ADDITONAL HUBS AND CONNECTIONS
WHAT IS A HIERARCHIAL TOPOLOGY
A HIERARCHIAL TOPOLOGY IS WHERE THE DEVICES CONNECT TO A CENTRAL HUB WHICH WILL IN TURN CONNECT TO A CENTRAL BUS BACKBONE
WHAT ARE THE ADVANTAGES AND DISADVANTAGES OF THE HIERARCHIAL TOPOLOGY
ADVANTAGES
- HIGHLY EXPANDABLE AS YOU CAN ADD ADDITONAL STARS TO THE BUS BACKBONE
DISADVANTAGES
- IF THE BUS BACKBONE GOES DOWN THE WHOLE NETWORK GOES DOWN WITH IT
WHAT IS A WIRELESS MESH TOPOLOGY?
A MESH TOPOLOGY CONSISTS OF NODES CONNECTED WITH MANY REDUNDANT INTERCONNECTIONS WITH SEVERAL NODES, A FULL MESH WILL INVOLVE EVERY NODE HAVING A CONNECTION TO EVERY OTHER NODE
WHAT ARE THE ADVANTAGES AND DISADVANTAGES OF A WIRELESS MESH TOPOLOGY?
ADVANTAGES
- IF ONE NODE FAILS ANOTHER CAN REPLACE IT
- FALSE IDENTIFICATION IS RELATIVELY EASY
DISADVANTAGES
- REQUIRES LOTS OF REDUNDANT CABLING TO CONNECT TO ACCESS POINTS
- INSTALLATION AND SETUP IS MORE COMPLICATED COMPARED TO OTHER NETWORKS
WHAT IS AN AD-HOC TOPOLOGY
THIS IS A LAN THAT IS BUILT AS DEVICES CONNECT
WHAT ARE THE ADVANTAGES AND DISADVANTAGES OR AN AD-HOC TOPOLOGY
ADVANTAGES
- DOESN’T REQUIRE ACCESS POINTS WHICH MAKES IT CHEAPER
DISADVANTAGES
- AS THE NETWORK GROWS PERFROMANCE CAN SUFFER AND NOT WORKING ACCORDINGLY
WHAT IS NETWORK ARCHITECTURE
NETWORK ARCHITECTURE IS CONSIDERED THE LAYOUT AND DESIGN OF A NETWORK