1.4 Wired and Wireless Networks Flashcards
(44 cards)
What is a NETWORK?
Networks are multiple devices (computers) connected together to share resources
What is a local area network called?
LAN
What is a wide area network is called?
WAN
List 2 characteristics of LANs
- Covers small geographic areas
- Connected with a switch
List 2 things about WANs
- Cover a large geographic area
- Connects LANs together in a large geographical area
List 3 disadvantages of NETWORKS
- Malware and viruses spread very easily between computers
- Expertise is expensive requires lot of money
- Increased secured risk of data
Give an example of Network
Internet
The speed of a network is measured in …
Bit per Second
What does… mean
- Kbps
- Mbps
- Gbps
Kilobits per second
Megabit per second
Gigabits per second
Define “Bandwidth”
It describes how much data can be transferred over a connection in a given time.
List the 2 types of copper Ethernet cables
Cat-5 goes to 100Mbps (Slower)
Cat-6 goes to 1 Gbps (Faster)
Define how fiber optic cables work
Fiber optic cables are a lot faster and transfer data using light, Fiber is really expensive.
Define “Backbone”
A backbone is a part of computer network that interconnects various pieces of network.
Name the 2 radio bands of WiFi
2.4 and 5ghz
List 3 characteristics in Wired Network
- It’s more costly than Wi-Fi to install in a building
- Allows hundreds of people to log in at the same time
- It is immune to radio interference
What is a server?
A server is a special computer on a network that is not used as a work station but is a computer dedicated to serving files and managing services.
What is the name of the network that uses a server?
A network that uses a server is called client-server model.
What is the name of a network that doesn’t use a server?
A network that doesn’t uses a server is called peer to peer model.
List 3 characteristics of Client server
- Server controls access and security to one shared file store.
- A server runs a backup of data.
- Most larger local area networks will use a client server type
Advantages of Client server
- Easier to manage security of files.
- Easier to take backups of all shared data. (because is connected to the server)
- Easier to install software updates to all computers.
Disadvantages of Client server
- Can be expensive to set up and maintain.
- Requires IT specialists to maintain.
- The server is a single point of failure. User would lose access if the server fails.
- If it overloads, stops sharing files
List 3 characteristics of Peer to Peer server
- Peers serve their own files to each other.
- Each peer is responsible for its own security.
- Each peer is responsible for its own backup.
Advantages of Peer to Peer server
- Very easy to maintain. Specialist staff are not required.
- No dependency on a single computer. (No single point of failure)
- Cheaper to set up. No expensive hardware required.
Disadvantages of Peer to Peer server
- The network is less secure. (No single service area that authenticates users, each client will need to authenticate it themselves)
- Users will need to manage their own backups.
- Can be difficult to maintain a well ordered file store.(If peers are sharing files with each other)
