Becoming familiar of TCP/IP is deep.

Today's topic settles down because it is really underlaying problems somehow and seems not to make a mistake in the problem sentence in seem a fairly old ....TCP/IP.. have it.. problem when reading. The material today then ..a Japanese problem it.. is [kochira] ↓↓.



■TCP/IP



Internet Protocol address of IPv6 is composed of 128 bits, and a vast address space can be used compared with Ipv4, and the unicast address, the multicast address, and the anycast address are allocated in use additionally.

These sentences are correct.
- The unicast multicast anycast can be used by IPv6's being composed of 128 bits.



The private address is defined only by the address space of class C though Internet Protocol address of Ipv4 uses the address area that was composed of 32 bits, and classified into class E by use by class A.

These sentences are wrong.
- The private address is class A?. It is defined in each address space of C.
- It is basic.



ICMP has the function etc. that carry error message and various demands/response message when the error occurs by the data transfer with the IP packet. The Ping command uses echo request/response message among various messages of this ICMP.

These sentences are correct.
- The state as it is｡｡



TCP is a protocol to the communication of the connection type used for UDP to communicate a connectionless type. Therefore, when reliability is requested from the data transfer, TCP is suitable, and when a good communication of the transfer efficiency is requested, UDP is suitable.

These sentences are correct.
- Natural. ｡｡



It is not when having already explained somehow. It thinks sentences of 1･3･4 to be correct when settling down and reading, and understand sentences of two. Isn't there private address without [wake] only of class C?It is [] feeling. It doesn't go easily because of this though it is good when it is laced that chief telecommunications engineer's problem occasionally is also easy ..so... ｡｡Then, around here though it is short today