I have read about block ciphers, but I do not understand the topic completely.

Is a block cipher a way to send data or a way to encrypt data?

How is the data dividec into multiply blocks before it is sent? Is the data partitioned before the encryption process or afterwards?

How long are the blocks? Can I choose any block size?

I have read about block ciphers, but I do not understand the topic completely.

Is a block cipher a way to send data or a way to encrypt data?

How is the data divided into multiply blocks before it is sent? Is the data partitioned before the encryption process or afterwards?

How long are the blocks? Can I choose any block size?

I have read about block cipher, but I do not understand the topic completely.

Is a block cipher a way to send data or a way to encrypt data?

How is the data divide into multiply blocks before it is sent? Is the data partitioned before the encryption process or afterwards?

How long are the blocks? Can I choose any block size?

I have read about block ciphers, but I do not understand the topic completely.

Is a block cipher a way to send data or a way to encrypt data?

How is the data dividec into multiply blocks before it is sent? Is the data partitioned before the encryption process or afterwards?

How long are the blocks? Can I choose any block size?

I am a beginner in cryptography I read about block cipher. but I do not understand exactly. what is mean? Is a way to send data or Is a way to encrypt data. If it's method to send data rather is divide data into multiply block before send data. If that's right.Is partition data before encryption process or after? I ask now How long block exactly. Am I can chosen any size to block.

I'm ready for further clarification if you do not understand؟

thanks please any suggest about this.

I have read about block cipher, but I do not understand the topic completely. 

Is a block cipher a way to send data or a way to encrypt data?

How is the data divide into multiply blocks before it is sent? Is the data partitioned before the encryption process or afterwards? 

How long are the blocks? Can I choose any block size?