Answer:
The transport layer
Explanation: Layer 4, is the transport layer of the Open System Interconnection (OSI), that handles message transfer of data between end systems or hosts and ensures complete packets transfer.
Answer:
Ensuring that Internet Service Providers (ISPs) work with IPv6
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Explanation:
An Internet Service Provider (ISP), it is the company that supply to other companies or an individuals for accessing the Internet and some other services such as virtual hosting and Web site building. ISP has the telecommunication line and an equipment to access the required point of area for the Internet.
Public key and private key - In public key encryption, a pair of keys is used (public key and private key). The public key can be made available publicly, while the private key is only known by the owner. The public key is used to encrypt the message, while the private key is used to decrypt the message.
The programmer solves the problems of a user by expressing an algorithm in a programming language to make a program that can run on a computer.
