Section 10 Chapter 59 - TCP/IP, standard application later protocols

Question 1

Layers of TCP/IP (4)

Answer 1

• Application
• Transport
• Network
• Link

Question 2

Application layer

Answer 2

Selects the protocol for the communication and adds the data to the packet

Question 3

Transport layer

Answer 3

Establishes a connection and splits the data into packets. Adds the port to the packets

Question 4

Network layer

Answer 4

Adds the source and destination ip addresses

Question 5

Link layer

Answer 5

The physical connection. Adds the source and destination MAC addresses to the packet.
note: these are not the original source and final destination addresses but rather the addresses for one specific hop, which there may be many of

Question 6

MAC address

Answer 6

12 digit hex code that uniquely identifies a network device

Question 7

Socket

Answer 7

A IP address and a port. It specifies a device AND application

Question 8

FTP port

Answer 8

20

Question 9

FPT control instructions port

Answer 9

21

Question 10

SSH port

Answer 10

22

Question 11

Telnet port

Answer 11

23

Question 12

Simple mail transfer protocol port

Answer 12

25

Question 13

HTTP port

Answer 13

80 and 8080

Question 14

POP3 port

Answer 14

110

Question 15

IMAP port

Answer 15

143

Question 16

HTTPS port

Answer 16

443

Question 17

What is FTP

Answer 17

A protocol for transferring files across a network

Question 18

What is SSH

Answer 18

A protocol for remotely accessing and managing a computer

Question 19

How other protocols can be used with SSH

Answer 19

A SSH client can make a TCP connection to a remote port and execute commands from other protocols such as GET from HTTP

Question 20

Use of SMTP

Answer 20

Transferring outgoing emails and emails from server to server

Question 21

How a sever functions with POP3

Answer 21

Will send you the email and then delete it from the server, which is a problem when accessing with multiple devices

Question 22

How a server functions with IMAP

Answer 22

Will send you the email but retain a copy on the server

Question 23

Role of a web server

Answer 23

Serving up web pages to clients via http

Question 24

Role of browser

Answer 24

Retrieves web pages and resources and then renders them