Network Resources Flashcards
Describe the main features of a client server network
∆ Controlling computer / network server
∆ Handles the processing requests from the other computers on the network
∆ For resources
∆ And controls security across the network
Describe two benefits of peer to peer network
∆ Low installation cost, no need to resource a dedicated server
∆ No need for a sophisticated OS
Describe one drawback of peer to peer networks
Low level of security, can’t be controlled internally
How can an additional computer be added to a bus network
Computer connected to shared bus through it’s own connector
How can an additional computer be added to a ring network
Link between two nodes is broken and new computer is connected between them
How can an additional computer be added to a star network
Computer only has to be connected to network by its own cable.
Describe the main features of a star network
∆ Multiple nodes are directly connected, each via its own cable to the hub/server which is in charge of communication
∆A node sends data to the hub
∆ The hub determines the recipient
∆The hub forwards data to the recipient
Describe the main features of a ring network
∆ The nodes are connected in a loop
∆ Each node is connected to two other adjacent nodes
∆ A special message called a token (data) is passed from node to node
∆ Until it reaches its intended recipient
∆ Data can only travel in one direction
Describe the main features of a bus network
∆ All nodes are connected onto a main cable
∆ Data can be transmitted bi-directional
∆Terminators are used at both ends of the main cable
∆ Each node can transfer data directly to any other node by sending it on the main cable
How does data travel from one computer to another on a bus network
∆Sending node places data on bus
∆Data travels along bus in both directions
∆ Each node checks if data is intended for it
∆ The recipient reads data
How does data travel from one computer to another on a ring network
∆ Each node is connected to two other adjacent nodes
∆ A special message called a token (data) is passed from node to node
∆ When a node has possession of a token it can add a message data
∆ It is passed from node to node until it arrives at destination
Describe the impact of cable failure on a star network
∆ Each node is directly connected to the hub/server
∆ Failure of a cable will only affect the node connected to the cable
∆ All other nodes will be able to connect to via the hub
Describe the impact of cable failure on a bus network
∆ All nodes are connected to the backbone
∆ Failure of the backbone will affect the rest of network
∆ Failure of cable connecting node to backbone will only affect that node
Describe the impact of cable failure on a ring network
∆ Nodes are connected to each other in a ring
∆ If one cable fails or there is a broken connection in the main cable then the entire network will fail
Describe an advantage of a star network over a ring network
∆ Less susceptible to cable failure
∆ There is no reliance on a central cable
∆ If cable goes down only link between one node and central computer is affected
Compare the ring and star topologies in regard to security
∆ The star topology is more secure because the server sends data directly to its intended recipient
∆ In the ring topology data is sent from node to node until it reaches its intended recipient
Compare the ring and star topologies in regard to reliability
∆ The star topology is more reliable because if a link fails only one node is affected
∆ In the ring topology if a link fails the entire loop fails
∆ If the central server fails in a star network then the whole network goes down
📝 Compare the impact of cable failure on data transmission over a star network and a bus network
∆⭐️ Each device is connected to a central hub by it’s own cable
∆🚎 All devices are connected to a backbone cable
Comparison:
∆ ⭐️ If a cable fails only a single device is affected
∆ 🚎 If the backbone fails all communication is affected, if a connecting cable fails only that device is affected
📝 Evaluate the star topology and the bus topology with respect to data security
⭐️ Network:
∆ Has a central dedicated fileserver, each node is connected directly to the hub by its own cable. The fileserver controls all network communication and the transfer of data packets
∆ The star network is more secure. Data packets are sent from fileserver to node directly via dedicated connection. Fileserver controls all security only intended recipient receives the data packet
🚎 Network:
∆ Has a main backbone to which all nodes are connected, and a terminator at both ends. A node sends a data packet to another node via the backbone
∆ Bus network is less secure. No central control of security, all nodes could access data packets on backbone, data packets travel in both directions
How is an IP address used in network communication
∆ Unique number uniquely identifies an internet device
∆ Part of it identifies network and part the device
∆ It may be static or dynamic
Compare and contrast a peer to peer network with a server based network
∆ In P2P all nodes have equal status and nodes share their resources with one another
∆ In SBN one node controls the network and its resources. Other nodes request resources from server. Remote software upgrades are possible with client server
∆ P2P upgrades are managed independently on each node
Describe a MAN
Covers a highly populated area using fibre optic/wireless technologies. Provides services for the community
Describe a WAN
Covers a large geographical area using the public telephone system. It provides services globally
How is a server used in a network?
Manages Network resources such as: ∆ Storage ∆ Files ∆ Hardware Devices/peripherals ∆Communications/emails
What does a switched hub do in a network?
∆ Acts as a connection point for a number of network computers/nodes
∆ Checks the destination/IP address of data packets and forwards them to intended recipients
What does a repeater do in a network?
Regenerates data transmission signals
📝 Explain the difference between the way in which IP addresses and MAC addresses are used on a network
∆ The IP address is set by the ISP it is linked to the physical location of the device.
∆ IP address is updated with the location of the device
∆ Each device has a set MAC address set by the manufacturer and is embedded on the network card
∆ IP addresses use 32 bits, MAC uses 48 bits
How is a network card used in a network
∆It connects a computer to a LAN so it can communicate with a file server
∆ It provides a port for connecting a network cable/Ethernet cable
How is a wireless access point used in a network
∆ To connect a computer to a router using Wi-Fi, in a hot spot using antennae
How is a MAC address used in a network?
To identify a computers Network Interface Card uniquely on a LAN
Describe the main features of P2P Network
There is no dedicated server, all computers have equal status, each computer supplies and consumes resources.
