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Explain the use of Go's network and web programming APIs for building and communicating with networked and web-based services and applications in Go programs?

Go provides a rich set of networking and web programming APIs that can be used to build robust and scalable networked and web-based services and applications. 

Some of the key APIs include:

net: This package provides a set of low-level networking primitives, such as sockets and TCP/IP protocol support, that can be used to build custom network protocols and services.

http: This package provides a set of high-level APIs for building web-based applications and services, including support for HTTP request/response handling, URL routing, cookie management, and more.

json: This package provides support for encoding and decoding JSON data, which is a widely used format for exchanging data between web-based services and applications.

encoding/xml: This package provides support for encoding and decoding XML data, which is another widely used format for exchanging data between web-based services and applications.

html/template: This package provides support for generating HTML templates, which can be used to build dynamic web pages and applications.

net/http/httptest: This package provides a set of utilities for testing HTTP-based services and applications, including support for creating mock HTTP requests and responses.

net/smtp: This package provides support for sending email messages using the Simple Mail Transfer Protocol (SMTP).

net/rpc: This package provides support for building remote procedure call (RPC) services and clients, which can be used to expose and consume functionality across networked services and applications.

net/http/pprof: This package provides support for profiling Go programs, including profiling HTTP-based services and applications.

Overall, these APIs provide a powerful set of tools for building networked and web-based services and applications in Go.

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