Lesson 7: Networking Programming in Java

Question 1

Sockets examples (2):

Answer 1

• Transmission Control Protocol (TCP)
• User Datagram
  Protocol (UDP).

Question 2

The second step involves establishing contact or associating the socket with another socket. True or false?

Answer 2

TRUE

Question 3

These packets are guaranteed to arrive (if lost, retransmission
occurs) and are received in order at the destination. True or false?

Answer 3

TRUE

Question 4

Requires access to various APIs and support from different application development environments.

Answer 4

Implementation

Question 5

In order to be able to communicate,
the sockets have to use the same protocol. True or false?

Answer 5

TRUE

Question 6

This step usually happens recursively. Information is sent and received by the two communicating
sockets. True or false?

Answer 6

TRUE

Question 7

Depending on the protocol, it
can either request a service or establish a connection. True or false?

Answer 7

TRUE

Question 8

They are created first and are bound for the duration of the data communication session.

Answer 8

Client and Server TCP sockets

Question 9

In general, the receiver
knows the server’s IP address, port number, and the protocol used and contacts it using these details. True or false?

Answer 9

FALSE, replace RECEIVER with CLIENT

Question 10

The first step involves creating and opening sockets. True or false?

Answer 10

TRUE

Question 11

The third step consists of exchanging data between the two parties and represents the main stage of network application’s communication tasks. True or false?

Answer 11

TRUE

Question 12

It is a connectionless non-reliable transmission
of datagrams protocol, similar to the postal service.

Answer 12

User Datagram
Protocol (UDP)

Question 13

They offer basic
transport data communication
support and hide lower layer
implementation details.

Answer 13

Sockets

Question 14

They provide a higher level of abstraction for the communication
infrastructure beneath and enable support for fast and easy network-based applications and development

Answer 14

Sockets

Question 15

A connection-based reliable, orderly transmission of data
packets, similar to the telephone service.

Answer 15

Transmission Control Protocol (TCP)

Question 16

Each communicating party requires a?

Answer 16

Separate socket

Question 17

Following connection establishment, TCP packets are sent to the computer’s
socket. True or false?

Answer 17

FALSE, replace COMPUTER with PARTNER

Question 18

Important parameters to be provided when creating/opening a socket

Answer 18

• IP address
• Port number
• Communication protocol (TCP or UDP).

Question 19

Are network communication link end-points between two applications (i.e., server and client).

Answer 19

Sockets

Question 20

Two type of sockets that can be used for application
development:

Answer 20

• Transport layer sockets
• Application layer sockets.

Question 21

The last step involves closing and destroying the sockets which closes the communication end-point. True or false?

Answer 21

TRUE

Question 22

When creating/opening a socket, the important parameters to be provided include the IP
address, port number, and
communication protocol (TCP or UDP). True or false?

Answer 22

TRUE

Question 23

They make use of transport-layer protocols such as the Transmission Control Protocol (TCP) and User Datagram Protocol (UDP).

Answer 23

Transport layer sockets

Question 24

Uses high-level programming languages and involves a set of principles and techniques.

Answer 24

Network application programming

Question 25

Java **provides a set of libraries and APIs** for **building network-based applications**. True or false?

Answer 25

True

Question 26

The network communication using sockets involves several **complicated steps** which have to be followed by the application developer in order to have a functional transport mechanism between the two communicating parties. True or false.

Answer 26

FALSE, replace COMPLICATED with BASIC

Question 27

After this step the socket **can still be used** for communication any more. True or false?

Answer 27

FALSE, CAN NOT BE USED

Question 28

Refer to **programs that utilize Java's extensive networking capabilities** to communicate and exchange data over networks.

Answer 28

Network-based applications in Java

Question 29

As TCP is a connection-oriented protocol, when **TCP sockets are used, connections are established between client and server hosts**. True or false?

Answer 29

TRUE

Question 30

**Provides the application developer the direct basic access to transport protocols**, offering data packet transport services between a sender and a receiver host over the network, while hiding the complexity and implementation details of the protocol.

Answer 30

Socket/s