Google IT Support Professional:The Bits and Bytes of Computer Networking (Week 4) Networking Services.

 Don't just copy for the sake of completion. 

Make sure you understand first.

★Name Resolution★

Q1.What transport layer protocol does DNS normally use?

1. TCP
2. IP
3. ICMP
4. UDP

While DNS over TCP does exist, UDP is the most common protocol.

Q2.A DNS TTL determines what?

1. How many steps there are in the resolution process
2. How far away a DNS can be from you
3. How many DNS resolutions can take place before the IP has to change
4. How long a DNS entry is allowed to be cached

TTL stands for Time to Live and determines how long a DNS entry can be cached.

Q3.How many root servers are there?

1. 8
2. 13
3. 16
4. 17

There are 13 root servers.

一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一

           Machine Learning Coursera-All weeks solutions [Assignment + Quiz] click here

       &

                         Coursera Google Data Analytics Professional Quiz Answers   click here

    &

                       Coursera Google IT Support Professional   click here

Have no concerns to ask doubts in the comment section. I will give my best to answer it.

If you find this helpful kindly comment and share the post.

This is the simplest way to encourage me to keep doing such work.

Thanks & Regards,

- Wolf