9.2 Networking Flashcards
What is topology ?
The structure of a network.
What are two types of topology to consider ?
Physical , Logical
What is Physical topology ?
The actual architecture of a network.
What are the two types of Physical topology ?
star and bus.
What are the characteristics of a physical star network ?
Each client has its own direct connection to the central hub.
What is the responsibility of the hub ?
receives packets for all of the clients connected to it and is responsible for delivering them to the correct recipient.
What are the advantages of a star topology ?
- Easy to add and remove clients
- One cable means no collisions
- Failure of one cable doesn’t affect the rest of the network
What are the disadvantages of a star topology ?
- If central hub fails , all communication in network fails
- Expensive due to amount of cable
How does a Physical bus topology work ?
A physical bus connects clients to a single cable called a backbone. A device called a terminator is placed at either end of the backbone.
What are the advantages of Physical bus topology ?
- No central Hub
- Inexpensive due to minimal cable
What are the disadvantages of Physical bus topology ?
-Shared backbone allows every client on the network to see packets .
- Risk of Collision
- Backbone fails = entire network fail
What is Logical network topology ?
the flow of data packets within a network
How does a logical bus network work ?
delivers packets to all clients on
the network
How does a logical star network work ?
Delivers packets only to their recipient.
What is a Host ?
a device on a network that provides services. eg. server
How does Client-server networking work ?
Clients on the network request services from the servers, which then respond to the client with the requested service.
How does Peer-to-peer networking work ?
services are provided by the
clients themselves and every client has equal status
What are the disadvantages of Peer-to-peer networking ?
All of the clients which provide
services must be running in order for the network to be fully operational.
What are the advantages of Peer-to-peer networking ?
- more cost effective
- no need for a powerful server
- easier to set up and maintain
What do wireless networks require ?
- a wireless access point
- a wireless network adapter in the device
What does WiFi refer to ?
A wireless local area network that is based on international standards
How are wireless networks secured ?
By encrypting transmitted data using WPA or WPA2
How does WPA work ?
Requires that a new wireless client enters a password in order to connect to the network.
What is disabling SSID broadcast ?
Disabling SSID broadcast stops wireless devices within range of the network from displaying that the network is available.
