Topic 2

Question 1

TCP

Answer 1

(Transmission Control protocol) A reliable data flow between two computers by providing a point-to-point connection based channel for application

Question 2

UDP

Answer 2

(User datagram protocol) uses independent data packets called datagrams to transport messages between applications

Question 3

Internet address(IP)

Answer 3

Internet protocol a 32-bit quantity that identifies a machine connected to the internet

Question 4

DomainName System(DNS)

Answer 4

translates an internet address in doted string format to the dotted numerical version

Question 5

InetAddress

Answer 5

in java.net it encapsulates an internet address

Question 6

Networking

Answer 6

The capability to make a connection from your application to a system over a network

Question 7

URLs

Answer 7

Uniform Resource Locators, a pointer to a web resource which can be anything from a file to an object

Question 8

Sockets

Answer 8

is one endpoint of a two-way communication link between two programs running on the network

Question 9

accept()

Answer 9

listens for a connection to be made to this socket and accepts it

Question 10

Socket classes

Answer 10

used to represent the connection between a client program and a server program

Question 11

close()

Answer 11

closes this socket

Question 12

getInetAddress()

Answer 12

returns the local InetAddress object of this server socket

Question 13

getLocalPort()

Answer 13

returns the port on which this socket is listening as an integer

Question 14

getInputStream()

Answer 14

returns an input stream for this socket

Question 15

getLocalAddress()

Answer 15

Gets the local address to which the socket is bound

Question 16

getLocalPort()

Answer 16

returns the local port to which this socket is bound

Question 17

getOutputStream()

Answer 17

returns an output stream for this socket

Question 18

getPort()

Answer 18

returns the remote port to which this socket is connected

Question 19

getProtocol()

Answer 19

returns the protocol identifier of the URL object

Question 20

getHost()

Answer 20

Returns the resource name(host) of the URL object

Question 21

getPort()

Answer 21

returns the port number as an integer of the URL object

Question 22

getFile()

Answer 22

returns the file name of the URL object

Question 23

getRef()

Answer 23

returns the optional reference of the URL object

Question 24

connect()

Answer 24

opens a communication link to the resource referenced by this URL

Question 25

getContent()

Answer 25

retrieves the contents of this URL in the form of an object

Question 26

toString()

Answer 26

returns a string representation of this url connection

Question 27

Buffers

Answer 27

containers for data

Question 28

channels

Answer 28

represent connections to entities capable of performing I/O operations