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Computer Science
[1.3]
| Question | Answer |
|---|---|
| What are two advantages of networking computers? | Files can be shared & you can communicate with others |
| What are two disadvantages of networking computers? | Hackers may access data & malware can spread across devices |
| Give two features of a LAN | Covers a small geographical area & maintained by the organization that uses it |
| Give two features of a WAN | Covers a large geographical area & can be connected by satellite links |
| What is bandwidth? | The amount of data which can be transmitted over a certain period of time |
| Why does too many users slow the network down? | More data is transmitted at the same time, so it lowers available bandwidth |
| Give two causes for failure of a wireless network. | Distance from WAP or walls/objects. |
| What is latency? | How long it takes a message to get from one device to another |
| Give two causes of high latency | High network traffic & data collisions |
| What does NIC stand for? | Network Interface Card |
| What does each NIC have? | A unique mac address |
| Give two features of Network cables. | They're fast and reliable & low cost |
| Give two features of Fibre optic. | Even faster & longer distances |
| What does a Network switch do? | Connects ethernet cables from devices on a LAN |
| How do you connect to the WAP? | The WIC in a device connects through radio waves |
| Give 2 features of a router. | Connects your LAN to your WAN & assigns IP addresses to devices |
| Give a difference between switches and routers. | Routers direct packets to destination using IP addresses, switches direct packets to destination using MAC addresses |
| Give two features of a star network. | All devices connected to central network switch & sends data to only the correct device |
| Give an advantage and a disadvantage of a star network. | If one computer/cable fails, only that device is affected & if switch (central point) fails, the whole network fails |
| Give two features of a full mesh network. | Every device is connected to each other & can be wired or wireless |
| Give an advantage and a disadvantage of a full mesh network. | Fast & complex to maintain + expensive |
| Give two features of a partial mesh network. | Cheaper to build & not all devices are connected to each other |
| Give two features of WiFi. | They need devices to have a wireless NIC & they can be impacted by interference |
| Give two features of Bluetooth. | Short-range & often used for wireless connections |
| Give an advantage and disadvantage of wireless connections. | No cables required & slower than wired connections |
| What does IP address stand for? | Internet Protocol Address |
| What gives a device it's unique IP address? | The network it's connected to |
| How is IPv4 laid out and what is it's max? | 123.123.12.312 (max is 255) |
| Why is IPv6 more convenient? | Supports a way larger number of devices than IPv4. |
| Give two facts about MAC addresses. | Unique to the NIC, Configured on devices hardware |
| What's a client-server network? | Managed by a server where files are stored centrally |
| Give two advantages of a client-server network. | Easy to control files, easier to back-up data (centrally) |
| Give two disadvantages of a client-server network. | Servers can be expensive and requires IT specialists |
| What's a peer-to-peer network? | All devices are connected to one another, responsible for own updates and no server needed |
| Advantages of peer-to-peer network? | Easy to set up and cheap |
| Disadvantages of peer-to-peer network? | No centralised management & if one device fails, data may be lost |
| Give two advantages of the cloud. | Can be accessed from any device, updates and security managed by a third party |
| Give two disadvantages of the cloud. | Vulnerable to hackers + subscription fees |
| What is DNS? | Matches the URL to IP address |
| How does the Domain Name Services work? | Browser sends domain to DNS server, server looks for IP and sends back to the web server, web server gives you requested page |
| What is a protocol? | A rule |
| What does HTTP stand for and what is it? | HyperText Transfer Protocol and accesses HTML pages by a client from a web server |
| What is FTP used for? | Transferring files between client and server |
| What is SMTP used for? | Sending email to their mail server |
| What is POP used for? | Receiving email |
| What is IMAP used for? | Receiving email but leaves a copy on server |
| Why are protocols split in to different layers? | They each have a specific task and developers can put their focus on to just one. |
Created by:
user-1956972