Networking

Question 1

TCP

Answer 1

Transport Control Protocol

Question 2

IP

Answer 2

Internet Protocol

Question 3

Application Layer Protocol

Answer 3

Decides how applications talk to each other

Question 4

Network Protocol

Answer 4

The connection established between two systems

Question 5

HTTP

Answer 5

Hypertext Transfer Protocol

Question 6

SMTP

Answer 6

Simple Message Transfer Protocol

Question 7

IP address is

Answer 7

A 32 bit number presented as a decimal number in 4 segments

Question 8

Port Number

Answer 8

16 bit number that ranges from 0-65535

Question 9

Socket

Answer 9

A virtual construct, made up of an IP address and a port number

Question 10

FQDN

Answer 10

Fully Qualified Domain Name, a name mapped to an IP address, the service that provides the mapping is called DNS

Question 11

Client Process

Answer 11

Initializes the connection to a server process and sends its request

Question 12

Server Process

Answer 12

Listens for client connections, accepts connections frim clients, recieves and processes their requests and returns a response

Question 13

PING

Answer 13

Package Internet Groper, tests connectivity between two hosts

Question 14

NS LOOK UP

Answer 14

Used to look up IP addresses of hosts

Question 15

TELNET

Answer 15

Used to connect remote hosts

Question 16

Client Process

Answer 16

Seeks the service of a server process
•opens a network connections
•sends a request
•recieves response
•closes connection
•java.net.Socket represents a client socket

Question 17

Server Process

Answer 17

Provides a service to clients, is always listening
•attaches itself to a specific network
•accepts client connection, establishes two-way communication channel
•recieves client requests, processes it
•sends response back
•java.net.ServerSocket

Question 18

java.net

Answer 18

•java.net.Socket: represents a client network
•java.net.ServerSocket: Represents a server process

Question 19

HTTP Protocol

Answer 19

•The client ( a wev browser) opens a network connection in port 80 for plain text or 443 for encrypted
•client sends http request using specific syntax
•server recieves request

Question 20

HTTP Request

Answer 20

•Request Keyword: specifies the nature of the request
•Resource: the actual resource you are looking for
•Header: additional information
•Optional HTTP Version number that can be added

Question 21

HTTP Request Keywords

Answer 21

•GET: This specifies that you are asking the server to return you the resource you are looking for
•HEAD: You are asking for the server to only return HTTP headers

Question 22

Header

Answer 22

Additional information like:
•browser type
•version
•cookies

Question 23

HTTP Response

Answer 23

•Response Code: Has a number and a string, indicates whether request was successful
•Header: Similar to request header, contains additional infi
•Body: Contains actual Response

Question 24

Common HTTP Codes

Answer 24

•200 - Ok: Request was successful
•404 - Not Found
•400 - Bad Request
•301 - Moved Permanently
•302 - Moved Temporarily