Network Programming

Question 1

ARP

Answer 1

Address Resolution Protocol

Question 2

MAC

Answer 2

Media Access Control

Question 3

Where is the MAC stored

Answer 3

On ROM on the NIC

Question 4

DNS

Answer 4

Domain Name Server

Question 5

What is the function of a DNS?

Answer 5

To resolve names to IP addresses

Question 6

Port 80

Answer 6

HTTP

Question 7

Port 442

Answer 7

HTTPS

Question 8

Port 22

Answer 8

SSH

Question 9

Port 23

Answer 9

Telnet

Question 10

Port 25

Answer 10

SMPT

Question 11

Port 53

Answer 11

DNS

Question 12

What ports can be used by the user?

Answer 12

Any port > 1024

Question 13

What is a DNS?

Answer 13

Special server on the Internet that translate host names into IP addresses

Question 14

IP

Answer 14

Internet Protocol

Question 15

What is IP?

Answer 15

A low-level protocol for delivering data from one computer to another across the Internet in packets

Question 16

TCP

Answer 16

Transmission Control Protocol

Question 17

What is TCP?

Answer 17

A higher level protocol than IP that is used in conjunction with IP

Question 18

UDP

Answer 18

User Datagram Protocol

Question 19

What is UDP?

Answer 19

A higher level protocol than IP that is used in conjunction with IP

Question 20

Sockets

Answer 20

Sockets are the endpoints of logical connections between two hosts and can be used to send and receive data

Question 21

Range of port numbers

Answer 21

Port numbers can range from 0-65536, but port numbers 0-1024 are reserved for privileged services.

Question 22

java.net.BindException

Answer 22

Caused when attempting to create a server socket on a port already in use