Course 1

Question 1

At what layer sits IPV6

Answer 1

layer 3

Question 2

At what layer sits ARP

Answer 2

layer 2 and 3

Question 3

At what layer sits ICMP

Answer 3

Layer 3

Question 4

At what layer sits OSPFV2

Answer 4

Layer 3

Question 5

At what layer sits TCP

Answer 5

Layer 4

Question 6

At what layer sits UDP

Answer 6

Layer 4

Question 7

At what layer sits SCTP

Answer 7

Layer 4

Question 8

At what layer sits DNS

Answer 8

Application

Question 9

At what layer sits DHCP

Answer 9

Application

Question 10

At what layer sits RIPV1

Answer 10

Application

Question 11

At what layer sits HTTPS

Answer 11

Application

Question 12

At what layer sits SSH

Answer 12

Application

Question 13

At what layer sits TELNET

Answer 13

Application

Question 14

“Version” field IPV4 header

Answer 14

4 bits IP version

Question 15

IHL IPV4 header

Answer 15

4 bits, min 20, max 60

Question 16

TOS IPV4 header

Answer 16

Raspuns pe foaie

Question 17

Total Length IPV4 header

Answer 17

16 bits, max value 2^16

Question 18

Identification IPV4 header

Answer 18

fragments belonging to the same datagram have the same 16 bit ID

Question 19

DF IPV4 header

Answer 19

Don’t fragment, =1 no more fragments

Question 20

MF IPV4 header

Answer 20

More fragments = 1 more fragments expected

Question 21

Fragment Offset IPV4 Header

Answer 21

13 bits, position of fragment within datagram

Question 22

TTL IPV4 header

Answer 22

0 => packet is discarded, an ICMP packet is sent to the source
>=1 => number of hops(Layer 3 devices)

Question 23

Protocol IPV4 header

Answer 23

type of protocol used within data field

Question 24

Header checksum IPV4 header

Answer 24

16 bit, 1’s complement applied to header

Question 25

Source address IPV4 header

Answer 25

32 bits Internet layer service access point

Question 26

Destination address IPV4 header

Answer 26

32 bit Internet layer service access point

Question 27

Options IPV4 Header

Answer 27

-Security
-Strict source routing
-Loose source routing
-record route
-timestamp

Question 28

Address range for class A

Answer 28

0.0.0.0 - 127.255.255.255

Question 29

Address range for class B

Answer 29

128.0.0.0 - 191.255.255.255

Question 30

Address range for class C

Answer 30

192.0.0.0 - 223.255.255.255

Question 31

Address range for class D

Answer 31

224.0.0.0 - 239.255.255.255

Question 32

Address range for class E

Answer 32

240.0.0.0 - 247.255.255.255

Question 33

Private ip addresses

Answer 33

10. toate
    172.16.0.0 -> 172.31.255.255
    192.168.0.0 -> 192.168.255.255