Week 3: L4-7 Protocols

Question 1

What are Process-to-Process Communication Protocols

Answer 1

Transmission Control Protocol (TCP) & User Datagram Protocol (UDP)

Question 2

What is the range of Well Known Ports?

Answer 2

0 - 1023

Question 3

What is the Range of Registered Ports?

Answer 3

1024 - 49151

Question 4

What is the range of Dynamic, Private or Ephemeral Ports?

Answer 4

49152 - 65535

Question 5

Telnet uses which Port?

Answer 5

TCP Port 23

Question 6

SSH uses which Port?

Answer 6

TCP Port 22

Question 7

FTP Uses which Ports?

Answer 7

TCP Port 21 for Control

TCP Port 20 for Data

Question 8

TFTP uses which Port?

Answer 8

UDP Port 69

Question 9

SNMP uses which Ports?

Answer 9

UDP Port 161 for general SNMP Messages

UDP Port 162 for SNMP trap messages

Question 10

HTTP uses which Port?

Answer 10

TCP Port 80

Question 11

HTTPS uses which Port?

Answer 11

TCP Port 443

Question 12

NTP uses which Port?

Answer 12

UDP Port 123

Question 13

DNS uses which Port?

Answer 13

UDP Port 53

Question 14

DHCP/BootP uses which Port?

Answer 14

UDP Port 67 & 68
OR
TCP Port 67 & 68

Question 15

What are the 4 Steps in DHCP Connection

Answer 15

1. Discovery
2. Offer
3. Request
4. Acknowledgement

Question 16

What are the characteristics of TCP?

Answer 16

Sequenced
Reliable
Connection-oriented
Acknowledgements
Windowing Flow Control
High Overhead
Uses port numbers