Exam 21: Internet Networking

Suppose that sock refers to a TCP socket connected to another machine, and in is aScanner. Which code sends the string "Who is there?" to the other machine, receives the return answer, and then prints it?

When you communicate with a web server to obtain data, you have two choices: I. You can make a socket connection and send GET and POST commands. II. You can make a server connection and send GET and POST commands. III. You can use the URLConnection class and have it issue the commands on your behalf. IV. You can use the URL class and have it issue the commands on your behalf.

The HTTP command GET ____________.

A(n) _______________ is a set of instructions and rules that the client and server follow to allow communication between them. Each will know what to send and what to expect to receive from its partner in the communication.

Which of the following protocols is used to send email messages?

The numbers 130.65.86.66 denote a(n) ____________________.

The ____ is a complex collection of pathways on which a message can travel from one access point to another.

The HTTP command HEAD ____________.

____________________ has no provision for retrying an incomplete transmission.

Buffering the characters means:

The HTTP command TRACE ____________.

The ____________ translates domain names into Internet addresses.

Suppose you use the URLGet program in Section 21.5 to get a web page that does not exist on a server (which does exist). Assuming that the server is otherwise working properly, what will happen?

If your data gets lost or garbled during transmission from one computer to another, what is responsible for ensuring that the recipient is aware of the unfortunate fact and does not rely on incomplete data?

Which code creates a server socket on port PORT_NUMBER and listens for a connection?

_____________ attempts reliable delivery of data, with retries if there are failures. It also notifies the sender whether or not the attempt succeeded.

You should use a ______ to connect to a web server.

A successful response has status _______________.

A(n) ____ is a pointer to an information resource on the World Wide Web.

__________________ is the protocol that defines communication between Web browsers and Web servers.