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Course: Archived AP CSP content > Unit 1
Lesson 4: Archived Reliable data transmissionHow can computers send data reliably?
Have you ever lost a letter or package in the mail? I once lost my entire passport! The postal system tries hard to deliver letters to their destination, but sometimes, things happen along the way: natural disasters, thefts, messy handwriting, hungry dogs.
The Internet is a lot like a postal system: it has to get information from one part of the world to another part of the world. Once again, things can happen along the way, like a fire destroying an ethernet cable.
The designers of the Internet wanted to make data transmission as reliable as possible, so they created the TCP/IP protocols to add fault tolerance and redundancy to the Internet.
In the next video, you'll learn more about TCP/IP from a Spotify software engineer and the creator of the Internet himself, and then we'll dig deeper into the protocols.
Want to join the conversation?
So IP protocols are internet protocols protocols?(3 votes)
:^) good catch!
Yes, things like that happen when people don't really think about what the abbreviation stands for.(4 votes)
What is scalable or the scalability of a network?(1 vote)- Scaling a network means making it grow. A scalable network is a network that's capable of managing growth.
So say have a network with 5 computers connected to it, if the network is scalable it will continue to work in the future when you connect another 5 computers to it (e.g. because you company grew).
I don't know if you learned about the IPv4 to IPv6 switch yet, but that's about keeping the internet scalable. IPv4 doesn't offer enough IP addresses to fulfill requirements so there is switch to IPv6 to ensure that the internet can continue to function like it's supposed to in the future.(3 votes)
- Where are the internet cables? On posts? In the ground?(1 vote)
- Yes, the cables for internet communications are on poles, underground and under the sea.(1 vote)
What is the role of the TCP/IP PROTOCOLS(1 vote)- The TCP/IPs are a family of protocols that manage communication between devices. For instance the entire internet is made possible by the protocols belonging to that group. Without protocols computers wouldn't know how to communicate with each otherand things like the internet wouldn't be possible.(1 vote)