Networking Flashcards
(29 cards)
What is a LAN?
Confined to a small geographical area su ch bad a building or group of buildings.
What is a WAN?
These span a wide geographical area such as possibly several continents.
What are main advantages of LANA?
-Cheaper
-Share resources
-File sharing
-centralised control(one network)
-Easy backup
What components do WANs involve?
-Computers
-Modems
-Firewalls
-Hubs
-Access points
What is a Star Network?
Consists of a central computer to which all other computer equipment is attached
What are advantages of star topology?
-Reliability-single device doesn’t affect network
-Ease of management due to central hub
-Fast Performance-data transmission speeds optimised
What are disadvantages of Star topology?
-Cost-Expensive to install and maintain
-If central hub fails entire network won’t work
-Requires regular maintanence
What is a Bus Network?
This topology consists of a single length of transmission cable on two which various computers and printers are attached
What are advantages of the bus topology?
Cost effective-less expensive due to single cable
Easy to Install-simple to set up
Easy to expand by adding cables and terminators
Easy to add or remove devices
What are disadvantages of the Bus Network?
Core failure-if main cable is damaged whole network fails
Slow performance-net slows as more devices added
Troubleshooting-difficult to identify and shoot problems if network goes down
What does Physical Topology mean
Physical layout of computer network including arrangement of devices and cables
What does Logical topology mean?
The way data is transmitted throughout a server and nodes on a network.
What are advantages of a client server network?
-Centralised control
-Centralised storage
-Scalability-new devices can be added
What are disadvantages of a Client-server network?
-Expensive
-Network congestion if too many clients
-Need IT Specialists
What are advantages of a Peer-to-Peer network?
-Cost-cheaper to set up as no server or specialist staff
-Resource availability
What are disadvantages of a Peer to Peer network?
-Security-each user is responsible for backups
_____ is a standard way of connecting devices wirelessly
Wifi
What are the advantages of a Wireless network?
-Cheaper to maintain
-Portable
-No wires
What are disadvantages of a wireless network?
-Interference
-Slower than wired connections
What is an SSID?
A Service Set Identifier is the way a wireless network can be identified, can be set yourself and for extra security can be hidden from all devices
What is a MAC Address?
Uniquely identifies a unique devices and is encoded into the NIC by manufacturer. These are 6 sets of 2 HEX digits.
What is a protocol?
A set of rules to ensure two or more devices are able to connect to each other and transmit data
What is a frequency?
What WiFi travels across referred to as a channel
What is a channel?
A specific frequency, 22MHz range
