Networking Flashcards
What are some advantages of ring topology?
- Flow of data is in unidirectional, and therefore reduces the chance of any collisions.
- No need for a network sever.
- Is the least costly compared to most of the others.
What are some advantages of bus topology?
- Easily add or remove new devices.
- Easy to expand simply by joining two cables.
- If one device fails, it doesn’t effect the network much.
What are some advantages of star topology?
- Easy to extend the network and add other devices.
- Easy to find any problems in the network.
- High data transmission speeds.
What are some disadvantages of star topology?
- If the server fails, the entire network goes down.
- Requires more wires and therefore more costly compared to others.
- Entire server relies on the central device.
What are some disadvantages of bus topology?
- Network traffic being high could slow the network down.
- If the backbone cable goes down, the server fails.
- Difficult to troubleshoot as devices are isolated.
What are some disadvantages of ring topology?
- If one device goes down, the entire network fails.
- It’s difficult to add/remove new devices onto the network without disturbing it.
- Are quite slow compared to others.
List some pros and cons of file servers:
- Easy way to sort out files.
- Easy & convenient way to share files over the network.
- If not configured/ set up properly, files could not be saved.
- Files can be lost if mirroring isn’t done regularly due to crashes in the system.
List some pros and cons of mail servers:
- Faster access to emails because it’s local instead of over the web.
- More customisation in handling the server diagnostics.
- If the internet goes down, you won’t be able to access your e-mails.
- Relying on other companies for backups etc.
List some pros and cons of web servers:
- Unique to each business/server, meaning more privacy.
- Costly to setup and maintain.
List some pros and cons of database servers:
- Improved security of information.
- Can hold large amounts of data.
- Is resource intensive - time, money and expertise.
- Not easy to make changes to once it’s been set up.
List some pros and cons of application servers:
- Don’t need constant updates of applications when it’s all done in one spot.
- Cost and setup can be quite expensive due to security needs as well.
- The bandwidth needed is always going to be more.
Which connections work with routers?
Router + Switch
Router + Up to 4 Devices
Wireless Router + WAPs
Router + WAP
Which connections work with modems?
Modem + Router + Switch
What are some advantages of using a network?
- Allows for the sharing of data and resources between users.
- Allows for the sharing of internet access over the network for users.
- Allows for hardware to be shared such as printers, for multiple users.
What are some pros and cons of using ethernet cables?
PROS
+ Speed is greater than wireless connections
+ Is more reliable because bandwidth isn’t being shared
+ Cheap
CONS
- Hard to install and requires time and money. Once installed there it has to be left at that building.
- Only connects a single device to the network/internet
- Susceptible to mild interference
Bandwidth of CAT5, 5e and 6 cables?
100Mbps, 1000Mbps (1Gbps), 10,000Mbps (10Gbps)
Range for CAT5, 5e and 6 cables?
100m, 100m, 33m for 10Gbps or 100m for 1Gbps
Bandwidth and range of fibre optic cables?
40Gbps and 10Km
Bandwidth and range of different types of WiFi standards?
- 11a
- 11b
- 11g - 54Mbps
- 11n - 450Mbps
- 11ac - 1300Mbps
802.11ax
All ranges vary depending on the location of the WAP/Router and the devices and their costs follow accordingly depending on the maximum bandwidth.
Bandwidth and range of Bluetooth 4.0?
25Mbps, 60m
What does ADSL stand for? How is Internet distributed and what are the speeds?
Asymmetric Digital Subscriber Line
It uses normal telephone lines for data transmission which are copper wires. You need an ADSL splitter to still use your telephone line as well.
Around 24Mbps for download, and 3Mbps upload.
What is Cable internet? How is Internet distributed and what are the speeds?
Uses hybrid-fibre cable to data transmission and is the same one that is used for pay TV.
Speeds are 100Mbps for download and 2Mbps for uploads depending on plans and ISP.
What is NBN internet? How is Internet distributed and what are the speeds?
National Broadband Network is rolling out across Australia uses fibre optic cable, wireless and satellite.
Speeds are broken up into 3 tiers which are 25/5Mbps, 50/20Mbps and 100/40Mbps
What’s IPv4? Why isn’t it used as much now?
The most widely used version of IP and allows for 32-bit IP addresses. Almost all IPv4 addresses have been used up.
What’s IPv6?
The most widely used version of IP and allows for 128-bit IP addresses. We use IPv6 because it has more addresses for people over the world.
What are ways to effectively secure a business’ network?
Firewalls, usernames & passwords/user credentials, encryption.
Antivirus isn’t one of them because this is for individual devices rather than the network itself.
Why/when should you use a ping test?
When a device doesn’t have access to the Internet, in order to check if a node is connected to a network or not.
What are some tests that you could run if you network isn’t working but your switch is working?
Try another network cable or try another network point.
What networking device is responsible for the DHCP protocol?
The router.
If a printer is advertised as a network printer, what does this mean?
They are capable of connecting to a network without the need of a print server.
What is the command used to test the pathway and time taken for a packet on a network to reach its destination server?
tracert
Which type of network is Bluetooth wireless technology designed to function over?
PAN - Personal Area Network
What test is used for testing if a computer and printer can send data between each other?
A printer test page. It’s used to confirm if the printer is connected to the network and if it’s correctly configured.
It also includes diagnostic info used to troubleshoot printer issues.
What are the typical speeds of a switch?
100Mbps or 1000Mbps
What are the costs for different types of Ethernet cables?
Cat5 - 50c/m
Cat5e - 60c/m
Cat6 - 60-90c/m
What is the network loopback address used to test a network card for successful operation?
127.0.0.1
What are some benefits of using VoIP?
- Allows for voice communications over a network.
- Lower costs versus traditional fixed line connection.
- Businesses are able to easily scale up or down without having to purchase additional hardware or dedicated lines.
- Improved call quality with audio compression and noise-cancelling microphones.
- More flexibility with softphones (software program for making telephone calls over the Internet, like Skype)
What are routable and non-routable addresses?
Routable addresses are also known as public addresses and can be accessed outside of a private network.
Non-routable addresses are private as they cannot be routed onto the Internet.
How can networks benefit from QoS?
Allows for management of network traffic by prioritising different transmission on the network.
What are some limitations of 802.11?
Its stability, signal from farther distances and as a result more costs to setup for the network to function effectively.
What’s the purpose of a data ‘packet’ in a network?
Sent data is converted into packets to send larger files and ensures that data can travel w/out taking up too much bandwidth.
List 2 potential causes of “Request timed out” result for a ping test.
- NTM is damaged
- Node/NTM isn’t connected to the network
- High network traffic
What are 2 benefits of enabling a ‘guest’ network?
- Guest user has a different password from the main network.
- Easier for guests to connect to the network.
- Guests don’t have access to the same permissions and access on the network as admins, therefore they have lower authority.
What are the advantages of using a network drive rather than a local drive to store data files?
Increased physical security, centralised backup and sharing of files and folders.
Describe the differences in efficiency and effectiveness for a NAS, SSD and HDD in a multi-user environment.
A NAS allows for many users to save files on the same network easily and share them.
SDDs and HDDs on the other hand are more used for single users in a single device.
What is the purpose of an ipconfig test?
Gives information on the network they are currently connected to such as the IP address, subnet mask and default gateway.
A student tries to log in to the school’s computer network and receives a message indicating that there is no server available to authenticate their login at this time.
Suggest 2 possible causes for this error message.
- Server is down
- School’s network traffic is overloaded
- Network switch isn’t working properly
Media on a client/server network is considered to be…
The wires that make the physical connections between clients and servers.
What device connects two or more networks together, such as the internet and a SOHO?
A router
How can you prevent interference with wireless connections such as WiFi and satellite over long distances?
- Move the WiFi aerials to be higher in the sky to not interfere with cars and devices on the ground
- Implement measures to increase the signal strength
How many unique identifiers do systems on a TCP/IPv4 network have?
Two:
- MAC Address
- IP Address
What are 3 advantages of using a web proxy server for a small business?
- More secure network, as requests of the user are validated before received. (Door analogy)
- Greater level of authority for the admins on the network.
- Less chance of malware attacks, and data traffic can be filtered.
What’s one requirement that must exist on a LAN for DHCP to function correctly.
A router
What does “size of patch panel” mean?
The number of ports of a switch.
Better to have more than less for future-proofing
Why are UTP cables twisted together?
To prevent more interference from other cables nearby.
