Web Science/Part1: Foundations of the web/Internet Protocol/Classful IPv4 networks/quiz

{what are the two parts of an IP address called - dots and Bytes + host part and network part - IP header and IP body
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{How many IPv4 addresses do exist - More than MAC addresses - enough so we do not need to worry + about 4 billion - as many as MAC addresses
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{What is achieved by introducing IP addresses?} + Uniquely identify each host on the internet + introduce an address hierarchy - building a way to guarantee the arrival of transmitted data. + be able to identify the network a computer belongs to

{Why do we need to introduce the network part in IP} + This is done to reduce the amount of entries in a routing table. - This is needed for upper layer protocols like TCP - Because one wants to represent the structure of local area networks on the internet
 * If computers are not grouped into networks every router would need to remember routes to every host on the Internet.

{How many networks of the following class exist in IPv4 3 4  127 ( = 2^7-1) +--- 128 ( = 2^7) ---+ 273 ( = 1 + 16 + 256 ) 16,383 ( = 2^14-1) -+-- 16,384 ( = 2^14) 2,097,151 ( = 2^21-1) --+- 2,097,152 ( = 2^21 )
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 * Class A | Class B | Class C | Private networks

{How many hosts can exist in the following class of IPv4 networks --- 16,777,216 ( = 2^24) +-- 16,777,214 ( = 2^24-2) --- 65,536 ( = 2^16) -+- 65,534 ( = 2^16-2) --- 256 ( = 2^8) --+ 254 (= 2^8-2)
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 * Class A | Class B | Class C

{A network device from network 100.0.0.0 receives an IP package with the destination IP address 150.1.2.3. Which of the following is true? - The network prefix of the destination address is 150 + The network prefix of the destination address is 150.1 - The network prefix of the destination address is 150.1.2 - The destination network is a class A network. + The destination network is a class B network. - The destination network is a class C network.
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