Lec 14: Network Security I

Question 1

What are the basic fundamentals of networks?

Answer 1

Question 2

What is packet switched network architecture?

Answer 2

Question 3

How are protocols sructured?

Answer 3

Question 4

What are the different data formats?

Answer 4

Question 5

What happens when I click on a web page from UCSD in Application layer?

Answer 5

Question 6

What happens when I click on a web page from UCSD in the transport layer?

Answer 6

Question 7

What happens when I click on a web page from UCSD in the network layer?

Answer 7

Question 8

What happens when I click on a web page from UCSD in the datalink layer?

Answer 8

Question 9

What happens when I click on a web page from UCSD in the physical layer?

Answer 9

Question 10

How does IP work?

Answer 10

Question 11

What do today’s IP Packet Header look like?

Answer 11

Question 12

What is the IP Protocol Functions?

Answer 12

Question 13

What is fragmentation?

Answer 13

Question 14

What is IP Fragmentation and Reassembly?

Answer 14

Question 15

What is TTL and how does it work?

Answer 15

Question 16

What is the header checksum?

Answer 16

Question 17

What is the transmission control protocol?

Answer 17

Question 18

How does TCP Delivery work?

Answer 18

Question 19

How does reliable communication work in TCP?

Answer 19

Question 20

What is the TCP Header Format?

Answer 20

Question 21

What is the connection set up on TCP? (three-way handshake)

Answer 21

• thre three way handshake to agree on initial sequence #s

Question 22

What are the basic TCP/IP security issues?

Answer 22

Question 23

How does packet sniffing work?

Answer 23

• TCP/IP attack

Question 24

What is TCP Connection spoofing?

Answer 24

• TCP/IP attack

Question 25

What is an example of denial-of-service vulnerability?

Answer 25

Question 26

What is random initial TCP SNs?

Answer 26

Question 27

How does blind port scanning work?

Answer 27

Question 28

What are protocol vulnerabilities?

Answer 28

Question 29

What is congestion control?

Answer 29

Question 30

How can congestion control be attacked?

Answer 30

Question 31

How does TCP congestion control work?

Answer 31

Question 32

What is the source of vulnerability in TCP congestion control?

Answer 32

Question 33

What is an example of a TCP congestion control vulnerability?

Answer 33

Question 34

(T/F) Having authenticity, confidentiality, and integrity in your protocols makes them secure.

Answer 34

Question 35

What is Network Perimeter Defense?

Answer 35

Question 36

What are firewalls?

Answer 36

Question 37

What are the different kinds of firewalls?

Answer 37

Question 38

What are network firewalls?

Answer 38

Question 39

What are packet filtering firewalls?

Answer 39

Question 40

What are ports?

Answer 40

Question 41

What is an example of filtering?

Answer 41

Question 42

What are the principles of firewall configuration?

Answer 42

Question 43

What are proxy-based firewalls?

Answer 43

Question 44

What are the pros and cons of firewalls?

Answer 44

Question 45

What is Network Address Translation?

Answer 45

Question 46

What is typical Network Address Translation Behavior?

Answer 46

Question 47

What is NAT Behavior on incoming packets on NAT port?

Answer 47

Question 48

What are the pros and cons of Network Address Translation?

Answer 48

Question 49

Why do lts of devices want to look at network traffic for security?

Answer 49

Question 50

What are challenges of network content analyysis?

Answer 50

Question 51

What is a network evasion?

Answer 51

Question 52

What is a TTL evasion?

Answer 52

Question 53

What is sequence # evasion?

Answer 53

Question 54

What is the solution to evasion (network, TLL, sequence #)?

Answer 54

Question 55

Overall, what are the problems with Network protocols?

Answer 55